high availability

Glued on February 25, 2009 at 22:37 EST

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Schedule: Drupal and MySQL High Availability | FOSDEM "Links User login Schedule: Drupal and MySQL High Availability Speakers Schedule Info . Lots of people use MySQL as the backend for their Drupal setup. This session will introduce you to the different methods of making MySQL High Available as well as the pitfalls in those methods. Amongst the alternatives we'll discuss MySQL Cluster, and how to integrate it with your environment so that not only the data stays available but also your MySQL Daemon. . As of 5.1 MySQL got a new feature called disk based cluster, however not all tables can benefit from it. We'll have a closer look where it can help Drupal." [1] Quoted from archive.fosdem.org/2008/schedule/even... [Published: Thu, 26 Feb 2009 03:38:52 GMT] [610 characters, 106 words] [score: 185]	Clustering and High Availability "Clustering High Availability Deploying Cluster Shared Volumes (CSV) in Windows Server 2008 R2 Failover Clustering . Hi cluster fans, . By now you have probably heard of the new architectural innovation being brought to Failover Clustering in Windows Server 2008 R2 known as Cluster Shared Volumes, or CSV. CSV functions as a distributed-access file system optimized for Hyper-V. A comparison would be to a clustered file system, however, unlike other clustered file systems, CSV does not use any proprietary technology – it uses standard NTFS, so there is nothing special you need to purchase or support – it just works! If your storage is suitable as a st" [2] Quoted from http://blogs.msdn.com/clustering/default.aspx [Published: Dynamic Content on Thu, 26 Feb 2009 03:38:53 GMT] [661 characters, 108 words] [score: 178]	Joel Oleson's Blog - SharePoint Land : SharePoint Backup Restore, High Availability, and Disaster Recovery "News MOSS Internet Sites Most Popular Posts My Favorite SharePoint Bloggers Tags Recent Posts SharePoint Backup Restore, High Availability, and Disaster Recovery . This post has been long comming. I recently spent some time with Samer Sawaya of SharePoint Recycle bin fame :). We have some good memories working through that one. You can thank me later for the 2nd stage not getting cut, I fought hard for that. We walked through his backup presentation a few weeks ago and remembered I hadn't done any posts on this topic. Although this has been a hot topic in the past I haven't allocated much time getting up to speed. I did spend some time with AvePoint at ITForum even got a bite to eat with Y. Quest's acqu" [3] Quoted from blogs.msdn.com/joelo/archive/2007/03/... [Published: Dynamic Content on Thu, 26 Feb 2009 03:38:54 GMT] [713 characters, 127 words] [score: 186]

Forefront TMG (ISA Server) Product Team Blog : Keeping High Availability with Forefront TMG’s ISP Redundancy Feature "Tags Archives January 2006 (7) Keeping High Availability with Forefront TMG’s ISP Redundancy Feature Overview . Today, more and more businesses rely on their Internet Service Providers link (or ISP) to handle their outside Internet world communications. Sending emails, browsing the web and any other web related actions are essential business infrastructure services that are only available as long the ISP line is up and running. Keeping a stable, available and reliable outside Internet connection is one of the critical tasks on every administrator’s check list. Forefront TMG provides a new capability called ISP redundancy which basically, enables utiliz" [4] Quoted from blogs.technet.com/isablog/archive/200... [Published: Dynamic Content on Thu, 26 Feb 2009 03:38:54 GMT] [665 characters, 99 words] [score: 172]	Solutions for High Availability and Disaster Recovery with MySQL. : MySQL Conference & Expo 2009 - O'Reilly Conferences, April 20 - 23, 2009, Santa Clara, CA "Solutions for High Availability and Disaster Recovery with MySQL. . Do you need high availability? If you are not certain, consider the following question: How much downtime can your business survive? If the answer is, “not too much,” or the cost of unplanned downtime is high, you should think about high availability for your application stack. If your application is really mission critical, you should consider disaster recovery as well. Gartner says that 50 percent of all companies who were affected by an incident like 9/11 were out of business within a year, if they were not prepared for such" [5] Quoted from en.oreilly.com/mysql2009/public/sched... [Published: Dynamic Content on Thu, 26 Feb 2009 03:38:31 GMT] [607 characters, 100 words] [score: 321]	High-availability cluster - Wikipedia, the free encyclopedia "High-availability cluster . High-availability clusters (also known as HA Clusters or Failover Clusters) are computer clusters that are implemented primarily for the purpose of providing high availability of services which the cluster provides. They operate by having redundant computers or nodes which are then used to provide service when system components fail. Normally, if a server with a particular application crashes, the application will be unavailable until someone fixes the crashed server. HA clustering remedies this situation by detecting hardware/software faults," [6] Quoted from en.wikipedia.org/wiki/High-availabili... [Published: Fri, 20 Feb 2009 14:45:12 GMT] [579 characters, 81 words] [score: 112]

High availability - Wikipedia, the free encyclopedia "High availability . High availability is a system design protocol and associated implementation that ensures a certain absolute degree of operational continuity during a given measurement period. . Availability refers to the ability of the user community to access the system, whether to submit new work, update or alter existing work, or collect the results of previous work. If a user cannot access the system, it is said to be unavailable. Generally, the term downtime is used to refer to periods when a system is unavailable. ." [7] Quoted from en.wikipedia.org/wiki/High_availabili... [Published: Tue, 17 Feb 2009 12:13:39 GMT] [533 characters, 87 words] [score: 257]	HP Alpha Systems - High Availability Cluster... "High availability clusters from HP provide superior, single-system manageability and easy deployment. HP solutions include Oracle 9i Real Application Clusters TruCluster Server (Clusters for Tru64 UNIX) and OpenVMS High Availability Cluster Software. Both offer a wide-range of capabilities and applications with a consistent view of storage across the cluster, a single-system image, and a backup application platform for rolling maintenance. Linux clusters Count on HP for flexible Disaster Tolerance Solutions to meet your needs at every point in your IT systems lifecycle. Learn m" [8] Quoted from h18002.www1.hp.com/alphaserver/produc... [Published: Dynamic Content on Thu, 26 Feb 2009 03:38:55 GMT] [585 characters, 84 words] [score: 245]	High Availability and Fault Tolerance for SOA Environment "Blogs Members My Home People Vendors Communities --> High Availability and Fault Tolerance for SOA Environment High Availability and Fault Tolerance are one of the critical requirements for SOA. When we are building a distributed service orientated system for enterprises, the availability and performance of the service environment plays a critical role in success. But there should be some mechanism to measure that what level of availability and fault tolerance required for my enterprise system. How do you know that level? Availability can be measured like how much time you can manage if your business system is unavailable. Basically it is level of risk acceptance that can be accommodated by your business. Considering that you are a Te" [9] Quoted from it.toolbox.com/blogs/soa-governance/h... [Published: Dynamic Content on Thu, 26 Feb 2009 03:30:16 GMT] [745 characters, 118 words] [score: 274]

2.5. Link Aggregation and High Availability with Bonding "2.5. Link Aggregation and High Availability with Bonding Chapter 2. Ethernet . Networking vendors have long offered a functionality for aggregating bandwidth across multiple physical links to a switch. This allows a machine (frequently a server) to treat multiple physical connections to switch units as a single logical link. The standard moniker for this technology is IEEE 802.3ad, although it is known by the common names of trunking, port trunking and link aggregation. The conventional use of bonding under linux is an implementation of this link aggregation. . A separate use of the same driver allows the kernel to pre" [10] Quoted from http://linux-ip.net/html/ether-bonding.html [Published: Sat, 31 Mar 2007 23:17:22 GMT] [630 characters, 97 words] [score: 177]	High Availability Solutions Overview "This section introduces several SQL Server high-availability solutions that improve the availability of servers or databases. A high-availability solution masks the effects of a hardware or software failure and maintains the availability of applications so that the perceived downtime for users is minimized. . SQL Server provides several options for creating high availability for a server or database. High-availability options include the following: Failover clustering Failover clustering provides high-availability support for an entire instance of SQL Server. A failover cluster is a combination of one or more nodes, or servers, with two or more shared disks. Appl" [11] Quoted from msdn.microsoft.com/en-us/library/ms19... [Published: Dynamic Content on Thu, 26 Feb 2009 03:38:57 GMT] [672 characters, 97 words] [score: 275]	Safari Books Online - 0738431389 - High Availability and Disaster Recovery Options for DB2 on Linux, UNIX, and Windows "As organizations strive to do more with less, IBM® DB2® for Linux®, UNIX®, and Windows® provides various built-in high availability features. DB2 further provides high availability solutions by leveraging enterprise system resources with broad support for clustering software such as HACMP™, TSA, and Microsoft® Windows Cluster Server. . This IBM Redbooks® publication describes DB2's high availability functions and features, focusing on High Availability Disaster Recovery (HADR) in the OLTP environment. The book provides a detailed discussion of HADR, including setup, configuration. administration, monitoring, and best practices. . We explain how to configure cluster software HAC" [12] Quoted from http://my.safaribooksonline.com/0738431389 [Published: Dynamic Content on Thu, 26 Feb 2009 03:38:58 GMT] [696 characters, 95 words] [score: 381]

Storage Virtual Appliance for High-Availability Environments | Open Source Magazine "The StorMagic SvSAN is designed to enable the deployment of a high-availability shared storage solution for VMware ESX environments for less than US$2,000, allowing users to take advantage of enhanced server virtualization functions without the need to purchase expensive shared storage. For a limited time, by contacting StorMagic or one of its resellers, end-users can obtain a promo key for a free copy of SvSAN, with no expiration date. . StorMagic SvSAN includes features users would expect from an enterprise-class SAN and provides optional licenses for high availability and capacity management. By turning unused storage capacity into a virtual SAN, the solution is designed to enable users to take advantage of high-end features of VMware environments such as VMware VMotionTM, without the need for an external SAN. StorMagic Sv" [13] Quoted from http://opensource.sys-con.com/node/853349 [Published: Thu, 26 Feb 2009 03:38:59 GMT] [838 characters, 129 words] [score: 105]	PuneTech » Cloud Computing and High Availability » Technology in Pune "Now Jaspreet Singh, of Pune-based startup Druvaa has weighed in on this issue on [...] Subscribe Email: Tags advertising animation barcamp BI bloggers community conference csi data warehousing domestic market education entrepreneurs Events government hardware hr ideacamp ideas innovation java jobs languages linux meetings Microsoft mobile networks News open source PHP pmc POCC PUG pune Pune City ruby security startups storage Technology user groups VC virtualization web Websites Recent Comments Cloud Computing and High Availability . Written by navin on July 27th, 2008 in In Depth, Money Matters, Technology Tags: availability, cloud computing, storage, Technology, web services . This article discussing strategies for achieving high availability of applications based on cloud computing services is reprinted with permission from the blog of Mukul Kumar of Pune-based ad optimization startup PubMatic . Cloud Computing has become very widespread with startups as well a" [14] Quoted from punetech.com/cloud-computing-and-high... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:06 GMT] [979 characters, 141 words] [score: 252]	high availability system Resources | TechRepublic "by Chad Perrin Tags: CIA, CIA Triad, High Availability System, Security, Chad Perrin Blog posts 2008-06-30 Achieving High Availability on a Linux Two-Node Cluster Using Oracle's Maximum Availability Architecture As more system capabilities are introduced, system administrators find it increasingly difficult to integrate the features for a unified High Availability HA solution meeting their business requirements. In the absence of a clear and cohesive solution, information technology managers might rely on hiring consultants to determine the appropriate HA system... Tags: Linux, Oracle Corp., High Availability White papers 2007-02-01 High Availability With Cisco Active Network Abstraction The high-availability characteristics of the Cisco Active Network Abstraction ANA system are based on distributed software architecture with internal process monitoring and interunit active-passive clustering and failover. The high-availability solution scales" [15] Quoted from search.techrepublic.com.com/search/hi... [Published: Dynamic Content on Thu, 26 Feb 2009 03:38:59 GMT] [958 characters, 126 words] [score: 504]

What is high availability? - a definition from Whatis.com - see also: HA "- In information technology, high availability refers to a system or component that is continuously operational for a desirably long length of time. availability can be measured relative to "100% operational" or "never failing." A widely-held but difficult-to-achieve standard of availability for a system or product is known as "five 9s" (99.999 percent) availability. . Since a computer system or a network consists of many parts in which all parts usually need to be present in order for the whole to be operational, much planning for high availability centers around backup and failover processing and data storage and access. For storage, a redundant array of independent disks (RAID) is one a" [16] Quoted from searchdatacenter.techtarget.com/sDefi... [Published: Dynamic Content on Thu, 26 Feb 2009 03:38:59 GMT] [699 characters, 111 words] [score: 278]	Search Done Right » Blog Archive » Achieving High Availability in Enterprise Search "Achieving High Availability in Enterprise Search . As organizations roll out search applications to end-users in order to provide a single point of information access, a funny thing happens - users become reliant on it and expect that search will be always “on” - just like it is on the web. However, many search applications on the market were not designed to address the demands of high availability, leaving customers to develop their own solutions and workarounds to address the problem. Given that search is becoming much more ubiquitous within the enterprise, designing search software with" [17] Quoted from searchdoneright.com/2007/02/achieving... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:00 GMT] [602 characters, 96 words] [score: 244]	High availability solutions for MySQL: An Overview and practical demo | Drupalcon Szeged 2008 "High: 6 Low: 0 Latest on the whiteboard High availability solutions for MySQL: An Overview and practical demo Attached files Placement Conference booklet summary and bio MySQL is a popular open source database system and often used as the backend for Drupal installations. This session will give an overview about different solutions and technologies available to make a MySQL Server system highly available. After the theoretical part, a practical demonstration of a HA cluster for Drupal will be performed. With the help of Red Hat Cluster Suite, we will build a HA solution using MySQL replication. If time permits, we will then extend the solution to use shared storage device. The session will start by giving an Introduction to High Availability, Terminology and general concepts involved. Afterwards, severeral MySQL" [18] Quoted from szeged2008.drupalcon.org/program/sess... [Published: Thu, 26 Feb 2009 03:39:00 GMT] [824 characters, 129 words] [score: 255]

High Availability "This High Availability content area includes topics that you can use to design, build, and operate a highly available messaging system based on the release to manufacturing (RTM) version of Microsoft Exchange Server 2007 and Exchange 2007 Service Pack 1 (SP1). The documentation in this area includes: . We recommend that you review the applicable documentation prior to designing or deploying a highly available messaging solution based on Exchange 2007 SP1. . The documentation in this area has been updated to include the latest recommendations and best practices for deploying Exchange 2007 SP1 on Windows Server 2008 and Windows Server 2003 Service Pack 2 (SP2). . While minimum uptime requirements vary among organizations, every organization would like to achieve a high" [19] Quoted from technet.microsoft.com/en-us/library/b... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:00 GMT] [790 characters, 109 words] [score: 183]	Software-RAID HOWTO: High Availability RAID "High Availability RAID . Q: RAID can help protect me against data loss. But how can I also ensure that the system is up as long as possible, and not prone to breakdown? Ideally, I want a system that is up 24 hours a day, 7 days a week, 365 days a year. A: High-Availability is difficult and expensive. The harder you try to make a system be fault tolerant, the harder and more expensive it gets. The following hints, tips, ideas and unsubstantiated rumors may help you with this quest. IDE disks can fail in such a way that the failed disk on an IDE ribbon can also pr" [20] Quoted from tldp.org/HOWTO/Software-RAID-0.4x-HOW... [Published: Tue, 14 Mar 2000 14:50:54 GMT] [569 characters, 110 words] [score: 202]	Voicemail Blast and High Availability Questions | trixbox "Home Products FAQ Downloads trixbox.com Voicemail Blast and High Availability Questions . Hello everyone, . We are contemplating purchasing a Trixbox appliance, but I need a few questions answered first. We are ready to purchase now, so getting these questions answered quickly is important! . 1) Does Trixbox have the ability to allow us to resell service on our single appliance to multiple customers with individual customized co-branding? Which version of Trixbox would we need to purchase? (Pro, Enterprise, Call Center?) . 2) Is there the capability to allow those customers to create their own voicemail blast groups? If so, is th" [21] Quoted from trixbox.org/forums/trixbox-pro/trixbo... [Published: Thu, 26 Feb 2009 03:39:02 GMT] [638 characters, 102 words] [score: 175]

Arun Gupta's Blog: TOTD #69: GlassFish High Availability/Clustering using Sun Web Server + Load Balancer Plugin on Windows Vista "Success Stories --> Arun Gupta's Blog TOTD #69: GlassFish High Availability/Clustering using Sun Web Server + Load Balancer Plugin on Windows Vista TOTD #67 shows how to configure GlassFish High Availability using Apache httpd + mod_jk on Mac OS X. Even though that's a standard and supported configuration, there are several advantages for replacing Apache httpd with Sun Web Server and mod_jk with Load Balancer plugin that comes with GlassFish. This ip f he ay (TOTD) shows how to configure Clustering and Load Balancing using GlassFish v2.1, Sun Web Server, Load Balancer plugin on Windows Vista. This blog is using JDK 6 U7, GlassFish v2.1 (cluster profile), Sun Web Server 7 U4, and Load Balancer plug-in with Sun GlassFish Enterprise Server 2.1 Enterprise Profile (with HADB link). Lets" [22] Quoted from weblogs.java.net/blog/arungupta/archi... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:00 GMT] [794 characters, 128 words] [score: 241]	Amazon.com: Blueprints for High Availability: Evan Marcus, Hal Stern: Books "High Availability: Design, Techniques and Processes (Harris Kern's Enterprise Computing Institute Series) by Floyd Piedad Editorial Reviews Product Description Expert techniques for designing your system to achieve maximum availability and predictable downtime . With your company s reputation and profits at stake, downtime on your 24/7 web site is not an option, nor is poor application performance. Now in its second edition, this authoritative book provides you with the design blueprints to maximize your system availability. . Striking a balance between costs and benefits, the authors show you all of the elements of your computer system that can fail as well as ways to assess their reliability and attain resiliency and high availability for each one. A unique feature is Tales from the Field, a collec" [23] Quoted from www.amazon.com/Blueprints-High-Availa... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:01 GMT] [812 characters, 126 words] [score: 263]	Amazon.com: High Availability: Design, Techniques and Processes (Harris Kern's Enterprise Computing Institute Series): Floyd Piedad, Michael W. Hawkins: Books "In High Availability: Design, Techniques and Processes, two leading IT experts bring together "best practices" for every people and process-related issue associated with maximizing application availability. The goal: to help enterprises dramatically improve the value of their strategic applications, without spending more money. Using extensive real-world examples and scenarios, the authors cover the entire application lifecycle. Learn how to design systems that will be easier to maintain; ensure that new systems will not increase in cost later due to problems you could have anticipated; and plan long-term availability strategies. Discover how to improve redundancy, increase standardization, simplify backups, and much more. These strategies and tec" [24] Quoted from www.amazon.com/High-Availability-Tech... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:02 GMT] [758 characters, 105 words] [score: 191]

Business Continuity with CA XOsoft High Availability "What is CA XOsoft High Availability?CA XOsoft High Availability is a business continuity and disaster recovery (BC/DR) software solution that ensures business systems, applications and data are always available, even in the face of planned and unplanned outages and natural disasters. CA XOsoft High Availability adds automated failover and failback to CA XOsoft Replication for a higher-level of business continuity. . What data protection and recovery challenges does it meet?CA XOsoft High Availability complements your existing backup solution by delivering a higher level of data protection. It provides continuous availability to mission-critical applications and data in case of planned and unplanned outages and speeds recovery of data due to loss from human error, system crashes, viruses and other malware. It improves operat" [25] Quoted from http://www.ca.com/us/business-continuity.aspx [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:03 GMT] [836 characters, 122 words] [score: 396]	CA XOsoft™ High Availability "Former name: CA XOsoft™ WANSync™HA High Availability . . Add another level of data protection by providing automatic failover for continuous application availability with CA XOsoft High Availability. Because data is increasing more rapidly than ever with evolving types of information requiring strong protection a single loss could mean irreparable damage to your organization. . Our CA XOsoft Replication (formerly CA XOsoft WANSync) and CA XOsoft High Availability products ensure uninterrupted access to all types of file and application servers. What" [26] Quoted from http://www.ca.com/us/smb/product.aspx?id=5940 [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:06 GMT] [561 characters, 81 words] [score: 321]	High Availability and Business Continuity - Solutions Center "Resource Center - Learn More High availability refers to a strategy that allows systems to be accessible nearly 100% of the time. This strategy can potentially eliminate downtime caused by hardware or software failure, power outages, viruses, etc. It is particularly effective for mission-critical applications and systems that, if down for any length of time, could negatively impact productivity or even the organization's image and reputation.[+] Read More High availability refers to a strategy that allows systems to be accessible nearly 100% of the time. This strategy can potentially eliminate downtime caused by hardware or software failure, power outages, viruses, etc." [27] Quoted from www.cdwg.com/content/solutions/busine... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:04 GMT] [679 characters, 101 words] [score: 243]

High Availability - Cisco Systems "Cisco High Availability is technology delivered in Cisco IOS Software that enables network-wide resilience to increase IP network availability. Network applications must cross different network segments - from the Enterprise Backbone, Enterprise Edge, and Service Provider Edge, through the Service Provider Core. All segments must be resilient to recover quickly enough for faults to be transparent to users and network applications. High Availabilty . Program Manager Tom Cramer describes the innovative capabilities of Cisco High Availability technologies: Stateful Switchover and In Service Software Upgrade. (4:28 min) . Viewing this embedded video requires the latest" [28] Quoted from www.cisco.com/en/US/products/ps6550/p... [Published: Wed, 25 Feb 2009 03:10:53 GMT] [675 characters, 94 words] [score: 260]	Dell High Availability Clustering "High Availability Solutions Brochure (Adobe Acrobat format)Dell Cluster Configuration Support Matrices . Overview and Benefits. . For many businesses, computing systems have become such an integral part of their company's business that severe consequences can occur when their systems are unavailable. These systems are used for critical business functions such as order processing and tracking, inventory control, transaction processing, customer support, and electronic commerce. And when these critical functions are not accessible it can result in lost revenue, lost productivity, reduced customer satisfaction, possible data loss or reduced decision" [29] Quoted from http://www.dell.com/ha [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:04 GMT] [656 characters, 89 words] [score: 171]	High Availability - Find White Papers and Technology Research "As a result of adopting a high availability strategy, this HP customer saved 97 million Euros, by avoiding lost downtime. Download Now This paper provides a comprehensive set of test-proven best practices for properly configuring, deploying, and operating an Oracle 10g database on an HP StorageWorks XP12000 Disk Array (XP12000) in an HP-UX environment using HP StorageWorks XP Continuous Access Software as the remote copy infrastructure. Download Now Faced with a growing number of business-critical applications and services to support, SMBs and enterprises with" [30] Quoted from www.findwhitepapers.com/security/high... [Published: Thu, 26 Feb 2009 03:39:05 GMT] [567 characters, 84 words] [score: 174]

X86 Server Virtualization For High Availability And Disaster Recovery by Stephanie Balaouras, Christopher Voce - Forrester Research "October 24, 2007 X86 Server Virtualization For High Availability And Disaster Recovery How x86 Server Virtualization Affects Business Resiliency . by Stephanie Balaouras, Christopher Voce . with Simon Yates, Rachel Batiancila Executive Summary . To date, the primary driver behind the adoption of server virtualization has been consolidation. But as enterprises gain experience with the technology, additional uses and benefits are surfacing. According to a recent Forrester study, 49% of enterprises surveyed that are implementing or interested in x86 server virtualization indicate that improving disaster recovery/business continuity continues to be a very important motivation for" [31] Quoted from http://www.forrester.com/go?docid=42944 [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:00 GMT] [686 characters, 95 words] [score: 172]	High Availability Management - Home Page "High Availability Management, LLC . Things can go wrong from time to time. . Computer systems fail. If your business computer system stopped working, what would this mean to your small business? We can help. By planning in advance for computer system failures, it is possible to mitigate their impact on your business operations. High Availability Management offers you products and services that will isolate the impact of system failures and allow you to continue operations without emergency intervention by computer professionals. To get started developing your plan for in" [32] Quoted from http://www.highavailability.us/ [Published: Thu, 06 Sep 2007 19:19:57 GMT] [578 characters, 90 words] [score: 241]	Enable high availability for composite applications "13 Jan 2009 This article describes an implementation of high availability for a composite application using Linux-HA. Delivering high availability to composite applications can be challenging. Because composite applications consist of several distinct applications, each with different availability requirements, configuration is complex. In this article, the authors describe how they designed and implemented a high availability prototype for Tivoli Maximo , a composite app. Their configuration script shows how you can provide high availability to a heterogeneous cluster of related applications using a systematic and prioritized failover schedule." [33] Quoted from www.ibm.com/developerworks/linux/libr... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:05 GMT] [655 characters, 88 words] [score: 395]

IEEE Task Force on Cluster Computing - High Availability "What is HA? High Availability (HA for short) refers to the availability of resources in a computer system, in the wake of component failures in the system. This can be achieved in a variety of ways, spanning the entire spectrum ranging at the one end from solutions that utilize custom and redundant hardware to ensure availability, to the other end to solutions that provide software solutions using off-the-shelf hardware components. The former class of solutions provide a higher degree of availability, but are significantly more expensive, than the latter class. This has led to the popularity of the latter class, with almost all vendors of computer systems offering various HA products. Typically, t" [34] Quoted from www.ieeetfcc.org/high-availability.ht... [Published: Tue, 17 Feb 2004 05:01:37 GMT] [707 characters, 113 words] [score: 204]	HomePage: Linux HA "Providing Open Source High-Availability Software for Linux and other OSes since 1999. . Introduction . Using Linux-HA . Links . ServeRAID / DTD . . . . . Last site update: 2009-02-26 02:57:47 . The High Availability Linux Project . The basic goal of the High Availability Linux project is to: . The Linux-HA project is a widely used and important component in many interesting High Availability solutions, and ranks as among the best HA software packages for any platform. We estimate that we currently have more than thirty thousand installati" [35] Quoted from http://www.linux-ha.org/ [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:07 GMT] [545 characters, 91 words] [score: 231]	Linux.com :: Keep your Web site online with a High Availability Linux Apache cluster "Share Print Comments Failover clusters are used to ensure high availability of system services and applications even through crashes, hardware failures, and environmental mishaps. In this article, I'll show you how to implement a rock-solid two-node high availability Apache cluster with the heartbeat application from The High-Availability Linux Project. I tested the cluster on Fedora Core 5, CentOS 4.3, and Ubuntu 6.06.1 LTS server distributions. . In a cluster environment, a high availability (HA) system is responsible for starting and stopping services, mounting and dismounting resources, monitoring the system availability in the cluster environment, and handling the ownership of the virtual IP address that's share" [36] Quoted from http://www.linux.com/feature/57362 [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:06 GMT] [727 characters, 105 words] [score: 347]

lf179, SystemAdministration: High Availability systems under Linux "Content: High Availability systems under Linux . Abstract: . When designing a mission critical systems, either during flowcharting or when building it physically with boxes, cables etc, one has to ask the following questions : When I ask these questions to myself, I get the same answer most of the time. I will get fired :) On the other hand when I ask my self the question "Will the Operating System Fail" I alway get this answer. No. You are not running 32 bit extensions for a 16 bit patch to an 8 bit operating system originally coded for a 4 bit microprocessor, written by a 2 bit compan" [37] Quoted from www.linuxfocus.org/English/November20... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:07 GMT] [594 characters, 109 words] [score: 185]	LinuxPlanet - Reviews - StaQWare: High Availability for Cobalt RaQ3i Servers - Extending the Cobalt RaQ3i Server Clusters "StaQWare: High Availability for Cobalt RaQ3i Servers . Extending the Cobalt RaQ3i Server Clusters . . Lisa Phifer . Tuesday, September 19, 2000 10:26:45 AM . . Originally appearing in ISP Planet. . Anyone in the hosting business knows that high availability is absolutely required. The real questions: how much do you need, how do you ensure it, and how much to spend in doing so. A plethora of alternatives exist, from fault-tolerant servers to hardware load balancers to open source software. Those with a bankroll can spend anywhere from $7K to $70K on high-speed switching and traffic managemen" [38] Quoted from www.linuxplanet.com/linuxplanet/revie... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:06 GMT] [599 characters, 99 words] [score: 253]	High Availability (HA) RTOS Package for Embedded High-Availability Systems "High Availability (HA) RTOS Package for Embedded Systems High availability framework for the LynxOS embedded real-time operating system . PRINTABLE PDF VERSION (52 kB) . Rapid development of real-time high availability embedded systems. . Working in combination with the LynxOS RTOS , the LynuxWorks High Availability Package (HAP ) presents a powerful platform for rapidly building high availability (HA ) systems including those utilizing cost-effective Commercial Off-The-Shelf (COTS ) hardware. . Creating high availability systems can be immensely challenging if you lack a flexible framework for their development, deployment and debugging." [39] Quoted from www.lynuxworks.com/rtos/high-availabi... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:07 GMT] [648 characters, 91 words] [score: 522]

Marathon Technologies: Disaster Recovery, High Availability "The world s first fault-tolerant, high availability software for server virtualization. Achieve uninterrupted availability, 100% data protection, and rapid recovery – all through “one-click operation. . What if you were actually able to prevent outages instead of merely planning for the recovery when a failure (inevitably) occurs? With everRun for Windows, now you can. . everRun is blindingly simple, disproportionally effective and attractively priced. If you re skeptical, try breaking it in. Qualifying organizations ca" [40] Quoted from http://www.marathontechnologies.com/ [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:00 GMT] [530 characters, 75 words] [score: 182]	High Availability Virtualization | XenServer High Availability "The integration of Marathon everRun ® and Citrix XenServer Enterprise Edition leap-frogs other offerings for high availability virtualization. . Here are the benefits from everRun VM s unique approach. . Run Business Critical Applications - And More - In Virtual Machines . everRun VM delivers reliable protection for critical applications like Exchange, SQL, SharePoint,and BlackBerry by providing redundant virtual machines and synchronized mirroring of your network, storage and data that prevents application downtime and data loss. . The integration of Citrix XenServer s superior bare-metal performance and everRun VM s unique software fault-tolerant architecture gives you th" [41] Quoted from www.marathontechnologies.com/high_ava... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:00 GMT] [684 characters, 97 words] [score: 270]	High availability and Heartbeat - Network World "Heartbeat arose from the Heart project in 1999 and is one of the foundational technologies of the High Availability Linux Project. . Now, as simple as failover might sound, we're talking computers and networking and so, of course, it isn't. In fact, the problem is so complex that the current release only supports a pair of nodes. This will change with the forthcoming release of HA Linux Release 2 (HAL-R2) within the next couple of months. . HAL-R2 will be a major revision of the entire Linux system. HAL-R2 will extend Heartbeat's functionality to support multiple nodes, the ability to monitor resources for correct operation, and support for configuration dependencies" [42] Quoted from www.networkworld.com/columnists/2005/... [Published: Dynamic Content on Thu, 26 Feb 2009 03:32:49 GMT] [676 characters, 110 words] [score: 175]

High Availability "Home High Availability . As more and more mission-critical applications move on the Internet, providing highly available services becomes increasingly important. One of the advantages of a clustered system is that it has hardware and software redundancy, because the cluster system consists of a number of independent nodes, and each node runs a copy of operating system and application software. High availability can be achieved by detecting node or daemon failures and reconfiguring the system appropriately, so that the workload can be taken over by the remaining nodes i" [43] Quoted from www.linuxvirtualserver.org/HighAvaila... [Published: Sat, 16 Sep 2006 10:08:14 GMT] [576 characters, 89 words] [score: 246]	High Availability database for real-time, embedded systems – eXtremeDB in-memory embedded database for fault-tolerant applications "Free, on-demand Webinars! Topics include High Availability, key embedded database selection criteria, and more. . Get Perst , the open source, object-oriented embedded database for Java and .NET. . Perst 4.0 for .NET broadens scope of McObject's solution for Microsoft's .NET Framework. Learn more. . Meet McObject in Hall 11 Stand 233 at Embedded World in Nuremberg, Germany, March 2 - 5. . e X treme DB Fusion's critical role in biometric face-reader is featured in Embedded Computing Design ! . Wondering about in-memory vs. on-disk database systems? A new article in India's CIOL Developer contrasts the technologies. . Dahan" [44] Quoted from www.mcobject.com/highavailability.sht... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:08 GMT] [630 characters, 100 words] [score: 171]	Windows Server 2008: High Availability "Providing high availability to mission-critical applications, services, and data is a primary objective of successful IT departments. When services are down or fail, business continuity is interrupted, which can result in significant losses. Windows Server 2008 supports many key high-availability features to help organizations meet their uptime requirements for their critical systems such as Failover Clustering, Network Load Balancing (NLB), Shadow Copy, Windows Server Backup and a new Windows Recovery Environment. Failover Clustering . Failover clustering can help you build redundancy into your network and eliminate single points of failure. Learn more at our extensiveFai" [45] Quoted from www.microsoft.com/windowsserver2008/e... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:08 GMT] [682 characters, 95 words] [score: 193]

Second p0st: High availability, the social side "[ Dec ] [ Feb ] essays useful posts my stuff 2009-1-20 High availability, the social side . Everyone loves to blog about how to achieve high availability with various schemes of redundant servers. However, there are some other things to consider. How do you assure high availability, or more importantly, that you won't lose data, when your company runs out of money (hopefully temporarily)? How about if someone hacks into your system and gets a copy of your private SSH key, or your AWS credentials? What if you have disgruntled employees? . The best solution I can think of is to have a backup box on a totally different provider, ideall" [46] Quoted from http://www.myelin.co.nz/post/2009/1/20/ [Published: Sun, 15 Feb 2009 05:38:20 GMT] [641 characters, 112 words] [score: 316]	MySQL :: DRBD for MySQL High Availability "Contact Us Online DRBD for MySQL High Availability . DRBD for MySQL is a high availability solution that combines MySQL, Linux Heartbeat, and Distributed Replicated Block Device (DRBD) so organizations can cost-effectively deliver High Availability (HA) database solutions. Implementing MySQL with these open source, high availability packages enables customers to: High Availability for MySQL Applications . DRBD for MySQL enables organizations to add high availability to new and existing business-critical MySQL systems including e-commerce, social networking, dynamic content man" [47] Quoted from http://www.mysql.com/drbd [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:08 GMT] [584 characters, 79 words] [score: 521]	MySQL :: MySQL High Availability "Contact Us Online MySQL High Availability . Then you will find MySQL High Availability is the course for you! This course is designed for experienced database administrators and system architects that want to analyze and form a basis of understanding different high availability options, including clustering and replication solutions within MySQL. This course will provide the tools required to make the decision of what high availability solution is appropriate and how to implement a system with the correct design. At the completion of this course, you should be able to:" [48] Quoted from www.mysql.com/training/courses/mysql_... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:08 GMT] [577 characters, 90 words] [score: 382]

Neverfail - High Availability "High availability is not just about data but also about the ability to continue with business regardless of the type of failure. For today's organizations, high availability is essential, especially in industries with strict compliance and regulatory requirements such as financial services, legal and government. . Typical clustering systems support high availability but at a price well beyond the budgetary goals of today's businesses. Simple replication systems lack full-recovery capabilities and require user intervention to restart applications, often taking 15, 20, 30 minutes or more to resume operations. That can mean a significant loss of revenue, productivity and" [49] Quoted from www.neverfailgroup.com/solutions/high... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:27 GMT] [677 characters, 98 words] [score: 313]	SUSE Linux Enterprise Server 10: High Availability Storage Infrastructure "The high availability of storage, applications and services is a critical requirement for your business to be competitive. But even as data grows, you can lower storage management costs and still benefit from an easy-to-manage, high-availability storage foundation that scales as needed. . In Fortune 1000 companies, storage has been doubling every 10 months. History has shown that data loss or inaccessibility to data for longer than two weeks due to disaster can cause a company to go out of business! The documentation requirements accompanying recent compliance regulations force companies to continually increase their data storage. This growth not only drives deman" [50] Quoted from www.novell.com/products/server/ha_sto... [Published: Dynamic Content on Thu, 26 Feb 2009 03:35:56 GMT] [673 characters, 102 words] [score: 192]	Using Xen for High Availability Clusters | O'Reilly Media "Using Xen for High Availability Clusters by Kris Buytaert and Johan Huysmans 02/05/2008 . The idea of using virtual machines to build high available clusters is not new. Some software companies claim that virtualization is the answer to your HA problems, off course that's not true. Yes, you can reduce downtime by migrating virtual machines to another physical machine for maintenance purposes or when you think hardware is about to fail, but if an application crashes you still need to make sure another application instance takes over the service. And by the time your hardware fails, it's usually already too late to initiate the migrat" [51] Quoted from www.onlamp.com/pub/a/onlamp/2008/02/0... [Published: Dynamic Content on Thu, 26 Feb 2009 03:38:47 GMT] [641 characters, 105 words] [score: 181]

Oracle Database High Availability (HA) "Building a high availability IT infrastructure is critical to the success and well being of all enterprises in today's fast moving economy. . One of the challenges in designing an HA solution is examining and addressing all the possible causes of downtime. It is important to consider causes of both unplanned and planned downtime when designing a fault tolerant and resilient IT infrastructure. Unplanned downtime is primarily the result of computer failures or data failures. Planned downtime is primarily due to data changes or system changes that must be applied to the production system. . Click on the following for a further explanation of what the critical high availability solut" [52] Quoted from www.oracle.com/technology/deploy/avai... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:09 GMT] [689 characters, 110 words] [score: 246]	PostgreSQL: Documentation: Manuals: PostgreSQL 8.3: High Availability, Load Balancing, and Replication "High Availability, Load Balancing, and Replication . Database servers can work together to allow a second server to take over quickly if the primary server fails (high availability), or to allow several computers to serve the same data (load balancing). Ideally, database servers could work together seamlessly. Web servers serving static web pages can be combined quite easily by merely load-balancing web requests to multiple machines. In fact, read-only database servers can be combined relatively easily too. Unfortunately, most database servers have a read/write mix of requests, and read/write se" [53] Quoted from www.postgresql.org/docs/8.3/static/hi... [Published: Fri, 06 Feb 2009 13:07:06 GMT] [603 characters, 90 words] [score: 242]	IBM Redbooks | High Availability and Disaster Recovery Options for DB2 on Linux, UNIX, and Windows "Redbooks All of IBM High Availability and Disaster Recovery Options for DB2 on Linux, UNIX, and Windows . An IBM books publication Others who downloaded this publication also downloaded . Others who downloaded this book also downloaded ... Abstract . As organizations strive to do more with less, IBM® DB2® for Linux®, UNIX®, and Windows® provides various built-in high availability features. DB2 further provides high availability solutions by leveraging enterprise system resources with broad support for clustering software such as HACMP™, TSA, and Microsoft® Windows Cluster Server. . This IBM Re" [54] Quoted from www.redbooks.ibm.com/abstracts/sg2473... [Published: Thu, 26 Feb 2009 03:39:09 GMT] [609 characters, 91 words] [score: 310]

redhat.com | Red Hat Cluster Suite "Skip to content Main Site Links: Links for this section: Red Hat Cluster Suite Low-cost high availability for enterprise applications . For applications that require maximum uptime, a Red Hat Enterprise Linux cluster with Red Hat Cluster Suite is the answer. Specifically designed for Red Hat Enterprise Linux, Red Hat Cluster Suite provides two distinct types of clustering: . With Red Hat Cluster Suite, applications can be deployed in high availability configurations so that they are always operational-bringing "scale-out" capabilities to Enterprise Linux deployments. . For high-volume open source applications, such as NFS, Samba, and Apache, Red Hat Cluster Suite p" [55] Quoted from http://www.redhat.com/cluster_suite/ [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:09 GMT] [674 characters, 101 words] [score: 151]	Dedicated Server High Availability Solutions "Server Intellect’s High Availability Solutions are designed for companies that require a load balanced solution that ensures their mission-critical Internet applications or websites are online at all times. If your entire website resides on a single server then your site is vulnerable to potential hardware failures and surges in traffic that could slow your site to a crawl. With one of our high availability solutions you can limit your exposure to such risks and balance the traffic for your site across multiple servers. Should any of the load balanced web servers fail then requests will simply be routed to the remaining servers in the cluster. Load balancing your servers will allow you to spread the requests across multiple servers and increase" [56] Quoted from www.serverintellect.com/solutions/ava... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:16 GMT] [758 characters, 121 words] [score: 243]	High Availability: Enterprise Messaging: Solutions: Progress Sonic "High Availability . The growing importance of conducting business 24x7 and the increasing need for real-time operations are driving the demand for high availability enterprise systems. These systems consist of several tiers of servers, each having particular availability characteristics and representing possible points of failure. IT organizations are faced with the challenge of maximizing system availability and eliminating any single point of failure. . Increasingly, businesses are demanding continuous service availability with no time for outages, whether plan" [57] Quoted from www.sonicsoftware.com/solutions/enter... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:10 GMT] [570 characters, 78 words] [score: 271]

Symantec Delivers High Availability and Disaster Recovery Solutions for VMware Environments "News Room Analyst Relations Careers Symantec Delivers High Availability and Disaster Recovery Solutions for VMware Environments . CUPERTINO, Calif. – Dec. 9, 2008 – Symantec Corp. (Nasdaq: SYMC) today announced collaboration with VMware to deliver enhanced high availability (HA) and disaster recovery (DR) solutions for VMware environments. The initiative includes: cooperative support through the Technical Support Alliance Network (TSANet) for mutual customers leveraging Symantec’s Veritas Cluster Server (VCS) for VMware ESX in VMware environments; integration between VCS and VMware Infrastructure to deliver complementary HA/DR solutions; and enhancements to VCS tha" [58] Quoted from www.symantec.com/about/news/release/a... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:10 GMT] [680 characters, 90 words] [score: 240]	Configuring Terracotta For High Availability "Configuring Terracotta For High Availability Introduction . High Availability (HA) is an implementation designed to maintain uptime and access to services even during component overloads and failures. Terracotta clusters offer simple and scalable HA implementations based on the Terracotta server array. Terracotta server arrays can vary from a basic two-node array consisting of an active server instance backed by a hot standby (for instant failover), to a multi-node array with many active server instances providing scale and deep failover coverage. . The main features of a Terracotta HA architecture inc" [59] Quoted from www.terracotta.org/web/display/docs/C... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:15 GMT] [610 characters, 90 words] [score: 244]	How to Configure VMware High Availability (VMHA) "One of those features is VMware�s High Availability feature � dubbed VMHA. . . When a physical server goes down or loses all network connectivity, VMHA steps in and migrates the virtual guest machines off of that server and onto another server. This way, the virtual machines can be up and running again in just the time that it takes them to reboot. . . Figure 1: VMware High Availability (VMHA) - Image Courtesy of VMware.com . This is a very powerful feature because it means that any operating system and appliance can have high availability just by running inside the VMware Infrastructure. . There are a numbe" [60] Quoted from www.virtualizationadmin.com/articles-... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:10 GMT] [616 characters, 108 words] [score: 315]

High Availability & Disaster Recovery "Sort by: Sonasoft offers a solution which provides an integrated data protection, high availability and disaster recovery solution for Exchange and SQL servers. SonaSafe application supports many disaster recovery scenarios for virtual servers. Customers can have multiple physical servers at the primary location and at the offsite disaster recovery location; they can have one physical server with multiple virtual servers. Also, multiple virtual servers from the primary site can be backed up and replicated to the disaster recovery site. . . In the case of SonaSafe, both on physical and virtual servers, the appropriate agents are installed and these agents have a very small footprint. Because of the limi" [61] Quoted from www.virtualizationadmin.com/software/... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:11 GMT] [712 characters, 109 words] [score: 172]	Products - High Availability "IBM i high availability offerings from Vision keep business-critical information continuously protected. Changes to applications, or other critical objects, are replicated in real time to a secondary server – either to your own or to a server belonging to one of our trusted hosting partners. When tape backups no longer cover recovery time and recovery point requirements, Vision high availability is the easy and fast-ROI solution for ensuring business continuity, increasing productivity, reducing operating costs and satisfying compliance requirements. . . . . . ." [62] Quoted from www.visionsolutions.com/Products/High... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:09 GMT] [572 characters, 85 words] [score: 244]	VMware High Availability (HA), Restart Your Virtual Machine - VMware "Deliver high availability across your entire virtualized IT environment without the cost or complexity of traditional clustering solutions. VMware HA provides cost-effective high availability for any application running in a virtual machine, regardless of its operating system or underlying hardware configuration. . VMware HA provides pervasive, cost-effective failover protection within your virtualized IT environment. Automatically Restart Virtual Machines . VMware HA is a feature-rich product that continuously monitors all physical servers in a resource pool and restarts virtual machines affected by server failure. . VMware HA is included in" [63] Quoted from http://www.vmware.com/products/vi/vc/ha.html [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:10 GMT] [652 characters, 89 words] [score: 245]

VMware High Availability & Business Continuity with Virtual Infrastructure - VMware "For server failures, VMware High Availability (HA)—a component of VMware Infrastructure 3—ensures rapid, automated restart of virtual machines. VMware HA automatically and intelligently restarts affected virtual machines on other production servers. As a part of virtual infrastructure, VMware HA can be easily configured for a server without dependencies on operating system, applications, or physical hardware. . Customers can also use third-party clustering software in virtual environments by clustering virtual machines with other virtual machines or clustering physical machines with other physical machines. VMware software makes it possible to implement clustering without requiring th" [64] Quoted from www.vmware.com/solutions/continuity/h... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:10 GMT] [698 characters, 93 words] [score: 174]	High Server Availability & Business Continuity via Virtualization - VMware "Ensure the high availability of your IT services and business-critical applications with VMware technologies for failover and load balancing along with hardware-independent backup and recovery. Meet and exceed your service level agreements by setting up automatic recovery from host failures and automating your resource allocation with High Availability clusters and Distributed Resource Scheduling (DRS). Learn to deliver failover with VMware High Availability and load balancing with VMware DRS VMware technology enables you to improve your disaster recovery process by extending the breadth of systems covered even while you reduce hardware costs and simplify backup and recovery processes. Find out how VMware can help yo" [65] Quoted from www.vmware.com/technology/high-availa... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:10 GMT] [727 characters, 104 words] [score: 211]	Asterisk High Availability Solutions - voip-info.org "Quick Links Asterisk Open Source VOIP Software VOIP Service Providers VOIP Phones What is VOIP? VOIP Event Calendar Home Main Page Blogs Recent Posts List Blogs Write Blog Post Blog Post Rankings Forums List Forums Asterisk FreeSWITCH GrandStream Polycom Phones Switchvox VoipSwitch VOIP Questions and Help VOIP Cloud Computing About Voip-info.org SARK-HA from Aelintra Telecom offers High Availability Asterisk out-of-the box. Runs Aelintra's SARK UCS MVP Asterisk implementation on a pair of servers.... Real-time failover takes less than 20 seconds to complete. Setup requires only 4 additional data fields to filled out in the SARK globals panel. Illustrated set-up guide HERE. Vovida has a SIP load balancer. This allows several Asterisk servers to be setup and appear to be a single server to users. Other load balacing approaches involve the SER SIP proxy, UltraMonkey (see below) or simple DNS round-robin. And then there's also app_distributor as th" [66] Quoted from www.voip-info.org/wiki/view/Asterisk+... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:10 GMT] [959 characters, 147 words] [score: 173]

What is High Availability? - A Word Definition From the Webopedia Computer Dictionary "High Availability High Availability, or HA as it is abbreviated, refers to the availability of resources in a computer system, in the wake of component failures in the system. This can be achieved in a variety of ways, spanning the entire spectrum ranging at the one end from solutions that use custom and redundant hardware to ensure availability, to the other end to solutions that provide software solutions using off-the-shelf hardware components. The former class of solutions provide a higher degree of availability, but are significantly more expensive, than the latter class. This has led to the popularity of the latter class, with almost all vendors of computer systems offering various HA products. Typically, these" [67] Quoted from www.webopedia.com/TERM/H/High_Availab... [Published: Dynamic Content on Thu, 26 Feb 2009 03:39:10 GMT] [727 characters, 115 words] [score: 274]

HAPCW2006-- High Availability and Performace Computing Workshop "High Availability (HA) Computing has long been played a critical role in industry mission critical applications. On the other hand, High Performance Computing (HPC) has equally been a significant enabler to the R D community for their scientific discoveries. Serviceability aims toward effective means by which corrective and preventive maintenance can be performed on a system. Higher serviceability improves availability and helps retaining quality, performance and continuity of services at expected levels. Together, the combination of HA, Serviceability, and HPC will clearly lead to even more benefits to critical shared major HEC resource environments" [68] Quoted from http://xcr.cenit.latech.edu/hapcw2006/ [Published: Thu, 01 Mar 2007 03:18:47 GMT] [660 characters, 94 words] [score: 193]