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2 Determining Your High Availability Requirements   (Site not responding. Last check: 2007-11-02) Businesses with higher availability requirements must deploy more fault-tolerant, redundant systems for their business components and have a larger investment in IT staff, processes, and services to ensure that the risk of business downtime is minimized. An analysis of the business requirements for high availability and an understanding of the accompanying costs enables an optimal solution that meets the needs of the business managers to be available as much as possible within financial and resource limitations of the business. High availability solutions must also be chosen keeping in mind financial considerations and future growth estimates. stanford.edu /dept/itss/docs/oracle/10g/server.101/b10726/hadesign.htm   (2308 words)

High availability - Wikipedia, the free encyclopedia 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, updated or alter existing work, or collect the results of previous work. Availability is usually expressed as a percentage of uptime in a given year. en.wikipedia.org /wiki/High_availability   (447 words)

Computech Resources High Availability High Availability is a core part of business continuity for organizations who need to protect themselves against system failure. Availability planning involves defining and implementing strategies to maintain business operations, no matter what type of manmade or natural disruption occurs; according to your organization's tolerance limits. High availability typically consists of redundant systems that are mirrored and provide fail over so there is no interruption in application availability. www.compures.com /computechresources.nsf/SPWD/InfrastructureSolutionsHA   (215 words)

High Availability: Firebox Vclass | WatchGuard Technologies, Inc. High Availability, in which two same-model firewall appliances are used, provides stateful failover for firewall and VPN connections. High Availability Active/Passive (A/P) High Availability A/P uses one Firebox® Vclass appliance as the primary source for enforcing your security policy, and another same-model appliance is designated as a standby. High Availability A/P is standard on Firebox® V100, V80, and V60, and is optional for V60L (not available on V10). www.watchguard.com /products/v_highavail.asp   (248 words)

Amazon.com: High Availability Networking with Cisco: Books: Vincent C. Jones   (Site not responding. Last check: 2007-11-02) Each chapter attacks a general need of high availability network design, from defining what high availability really means and requires in the first chapter to the final chapter's discussion of the essential commitment to a full range of network management capabilities. It is essential for all to keep in mind that high availability is not just a design parameter, it is also an executive management commitment to funding adequate resources, staffing and training for the life of the network. High availability is not an automatic result of adding redundant links and components to a network. amazon.com /Availability-Networking-Cisco-Vincent-Jones/dp/0201704552   (3761 words)

Designing for High Availability HA infrastructure ensures that an application has constant availability of network, processors, disks, memory, etc., such that a failure of one of these components is transparent to the application. Availability is usually assessed using several perspectives, either from a technology standpoint (network, servers, etc.), from a geography standpoint or from a process/organization standpoint. Availability or other infrastructure performance results are linked to good technology and to the robustness of the different management processes supporting it. www.dmreview.com /article_sub.cfm?articleId=1001155   (4344 words)

high availability - a Whatis.com definition 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. Some availability experts emphasize that, for any system to be highly available, the parts of a system should be well-designed and thoroughly tested before they are used. whatis.techtarget.com /gDefinition/0,294236,sid7_gci761219,00.html   (254 words)

Dell High Availability Clustering High Availability Clusters provide the next level of availability to further increase business critical applications availability. By transferring the users to a backup system, high availability clustering is designed to minimize the amount of downtime. Pricing, specifications, availability and terms of offers may change without notice, are not transferable and are valid only for new purchases from Dell Medium and Large Business for delivery in the 50 United States and District of Columbia. www.dell.com /content/topics/global.aspx/solutions/en/clustering_ha?c=us&cs=555&l=en&s=biz   (609 words)

Cameron Systems :: CameronFIX High Availability The Highly Available CameronFIX platform provides a continuous FIX service to your trading counterparties and is an end-to-end solution protecting all FIX sessions, their associated message processors and trading infrastructure connections. It is possible to configure High Availability in an active/active mode where two or more servers process FIX traffic concurrently and still provide automatic failover. High Availability across a Wide Area Network is used to backup servers at remote sites. www.cameronsystems.com /products/ha.html   (855 words)

XOsoft's High Availability Solution - WANSyncHA Server WANSyncHA is a high availability solution based on asynchronous real-time replication and automated application failover and failback to provide cost-effective business continuity for file servers and other application servers on both 32- and 64 bit Windows servers. WANSyncHA is a high availability solution that integrates several technologies to provide continuous availability of your mission-critical file and application servers through a wide range of disruptions from server failure to data corruption to the loss of an entire site. The WANSyncHA high availability solution is designed to be an out-of-the-box solution for realistic environments, but also provides support for you to customize to fit your needs, so that you are free to do effective disaster recovery planning for your business. www.xosoft.com /products/f_WANSyncHAServer.shtml   (2236 words)

High Availability (HA) RTOS Package for Embedded High-Availability Systems Creating high availability systems can be immensely challenging if you lack a flexible framework for their development, deployment and debugging. With the High Availability Package, open system software extensions, developers can utilize commercial hardware components coupled with redundant elements and switchover applications to construct systems that remain in service a high percent of the time—including systems supporting 99.999%, or "5-nines," uptime. The sophisticated high availability framework provided by HAP is unique in the industry in that it enables developers to construct systems that previously required considerable use of non-COTS hardware and software. www.lynuxworks.com /rtos/high-availability.php3   (723 words)

High availability networks - Ensonix   (Site not responding. Last check: 2007-11-02) Prevention of downtime and increasing availability can be as easy as setting up a proper backup and restore routine, or can be as complex as setting up multiple systems in different geographic locations around the country or world. This increases availability by allow other system to perform their desired tasks while other ones are off line for maintenance. If your online business relies on maximising the availability of the services it provides to your customers and clients even in the event of a catastrophic disaster, then we can help you to acheive near continuous uptime and increase your revenues and profits. www.ensonix.com /networks/high_availability.aspx   (869 words)

High Availability 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 in the cluster. In general, there are service monitor daemons running on the load balancer to check server health periodically, as illustrated in the figure of LVS high availability. There are several software packages in conjuction with LVS to provide high availability of the whole system, such as Red Hat Piranha, Keepalived, UltraMonkey, heartbeat plus ldirectord, and heartbeat plus mon. www.linuxvirtualserver.org /HighAvailability.html   (672 words)

High Availability Issues with BEA Tuxedo The purpose of this paper is to discuss the shortcoming of Tuxedo in the area of High Availability, and how it can be improved when combined with a High Availability package. High Availability Cluster Multi-Processing (HACMP) for AIX is a high availability application that can link up over a dozen RS06000 nodes into highly available clusters. Tuxedo, as matured as it is, does not provide a subsystem that exclusively deals with high availability. www.aurorainfo.com /wp3/index.htm   (2752 words)

Oracle Database High Availability (HA)   (Site not responding. Last check: 2007-11-02) Building a high availability IT infrastructure is critical to the success and well being of all enterprises in today's fast moving economy. Click on the following for a further explanation of what the critical high availability solution areas are, why they are important considerations for building a highly available solution, and what are Oracle's offerings in each of these areas. High Availability Collateral - Oracle Database 10g Release 2 www.oracle.com /technology/deploy/availability/index.html   (264 words)

High Availability The High Availability Linux Project: Linux-HA is the home of "heartbeat," the high availability code that can be used by itself, but is also implemented by various load sharing and balancing cluster software. Linux Replicated High Availability Manager: The Linux Replicated High Availablity Manager tries to offer a solution for Linux, based on ENBD, similar to what the author had previously developed on the Solaris platform using shared SCSI disks and Veritas Volume Manager. MC/Serviceguard: Multi computer/Serviceguard, by Hewlett Packard, is a High Availability facility that can protect against a variety of hardware and software failures, while ensuring the availability of critical services. lcic.org /ha.html   (771 words)

Amazon.com: Blueprints for High Availability: Books: Evan Marcus,Hal Stern   (Site not responding. Last check: 2007-11-02) High availability is almost like the Holy Grail - believers know it exists, but getting it can be a quest. High Availability as a design concept has kind of been brushed off to the side in recent years. However, high availability as a design concept is still the standard and once you understand how it all works and what the difference between 99% versus 99.75% availability you can take steps to maintain that high availability of your network systems. www.amazon.com /Blueprints-High-Availability-Evan-Marcus/dp/0471430269   (2212 words)

Become.com - Shop results for high availability software High Availability A/A lets both same-model Firebox Vclass appliances pass traffic at the same time, nearly doubling the firewall and VPN... HP MSA500 G2 High Availability Kit is built upon reliable and... High Availability solutions for local and wide area networks. www.become.com /shop?q=high+availability+software   (159 words)

High Availability disk products for the HP e3000   (Site not responding. Last check: 2007-11-02) To take advantage of the high availability configuration, the mirrored partners should be configured to ensure pathway redundancy. The automatic failover will give the Nike pathway redundancy, increasing its high availability feature set by reducing the likelihood that any of the five points of failure will deny access to user data. The Symmetrix 3000 is currently the high end disk product offered by Hewlett-Packard Company, in conjunction with EMC Inc., particularly for the HP3000 and HP9000 high availability and data center management solutions. jazz.external.hp.com /papers/ha.html   (1964 words)

High Availability - Cisco Systems Cisco High Availability enables network-wide protection by providing fast recovery from faults that may occur in any part of the network. With Cisco High Availability, network hardware and software work together and enable rapid recovery from disruptions to ensure fault transparency to users and network applications. Cisco High Availability features are offered on existing Cisco IOS platforms and currently-deployed hardware, which ensures investment protection for Cisco customers. www.cisco.com /en/US/products/ps6550/products_ios_technology_home.html   (320 words)

High Availability : CU*Answers   (Site not responding. Last check: 2007-11-02) The first step was to build High Availability capability for the iSeries to allow us to retain Production iSeries support even while undergoing routine equipment management such as hardware maintenance, operating system changes, facility changes, and the like. A key component of effective High Availability is that it must be considered a normal operations mode, with regularly scheduled rollovers not only for special situations, but also as proof of our redundant readiness. We mentioned earlier that High Availability operation must be considered a normal operations mode, and practice makes perfect; however, we do not wish to inconvenience our clients as we roll from system to system. www.cuanswers.com /highavailability.php   (1547 words)

IBM System i5 for High Availability System i5 High Availability offerings are designed to help you meet your business continuity and resiliency needs. To achieve the highest possible availability, multiple i5 systems are tied together with high function, high availability software. Additional information on these solutions is available from the vendor or on the System i5 HA Web site. www-03.ibm.com /servers/eserver/iseries/hardware/is4ha   (599 words)

High-availability middleware on Linux, Part 2: IBM WebSphere MQ In the second of five installments on implementing middleware in high availability configurations, learn how to install and configure IBM® WebSphere® MQ messaging middleware on a heartbeat cluster, providing failover capability in the event of a system malfunction. In Part 1 of this series, I introduced you to high availability (HA) concepts and how to install and configure heartbeat. WebSphere Business Integration Message Broker and high availability environments shows how to achieve high availability through a combination of software design and clustering (developerWorks, March 2004). www-128.ibm.com /developerworks/library/l-halinux2/?ca=dnt-549   (2306 words)

D. Kalinsky Associates - Whitepaper "Design Patterns for High Availability" High availability systems are those able to tolerate both expected and unexpected faults. Availability is often measured in units of “availability percentage” or But “high availability” systems are often expected to be available 99.999% of the www.kalinskyassociates.com /Wpaper6.html   (2890 words)

High Availability   (Site not responding. Last check: 2007-11-02) Administrators are faced with the challenge of identifying underutilized storage devices in complex environments and load-balancing capacity across all available resources. What organizations need are solutions designed to facilitate a high-availability environment, and can help prevent (or better tolerate) system outages, while enabling administrators the ability to optimize capacity utilization across the enterprise. The 2 and 4 Gbit/sec Brocade SilkWorm family of directors and switches set a new industry standard for ultra-high availability, scalability, and manageability, in the storage environment. www.brocade.com /solutions/high_availability.jsp   (218 words)

Data Storage, SAN, NAS, and High Availability - Arsenal Digital Solutions™   (Site not responding. Last check: 2007-11-02) Based upon multi-vendor, best-of-breed storage infrastructures, both ViaStor SAN, SAN-HA (High Availability) and NAS services offer virtually limitless capacity; these storage solutions are proactively managed and monitored 24x7 by Arsenal storage professionals, and offered on a pay-as-you-go basis. The Snapshot option is designed for businesses whose data availability cannot be disrupted by routine management functions such as system backup and data copying. Both synchronous and asynchronous replication options are available, depending on business requirements for system performance and data integrity. www.arsenaldigital.com /services/onsite-data-storage.htm   (768 words)

High-availability middleware on Linux, Part 3: IBM LoadLeveler In the example of a high-availability configuration for a scheduling machine, the necessary local files and directories are placed on external shared disk storage, which makes them available to a backup scheduling machine in the event of scheduler node failure. In this installment, you have seen how to implement high availability for a LoadLeveler cluster using the built-in capabilities of LoadLeveler, and how to further enhance availability by using open source software. For a detailed discussion of availability and how to plan for and maintain it in an enterprise middleware environment, read "Planning for Availability in the Enterprise" (developerWorks, December 2003). www.ibm.com /developerworks/library/l-halinux3/index.html?ca=drs-l1105   (2888 words)

Programa [19:19] (marcelo) So, for a system to be considered "highly available" it must, in theory, have 5 minutes of downtine during the period of 1 year. [19:19] (marcelo) The old model of high availability is "fault tolerance" usually hardware-based. high availability is the collection of these methods umeet.uninet.edu /conferencias/29-11-2000/2911_eng.html   (4232 words)

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