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- High-availability_cluster abstract "High-availability clusters (also known as HA clusters or fail over clusters) are groups of computers that support server applications that can be reliably utilized with a minimum of down-time. They operate by using high availability software to harness redundant computers in groups or clusters that provide continued service when system components fail. Without clustering, if a server running a particular application crashes, the application will be unavailable until the crashed server is fixed. HA clustering remedies this situation by detecting hardware/software faults, and immediately restarting the application on another system without requiring administrative intervention, a process known as failover. As part of this process, clustering software may configure the node before starting the application on it. For example, appropriate filesystems may need to be imported and mounted, network hardware may have to be configured, and some supporting applications may need to be running as well.HA clusters are often used for critical databases, file sharing on a network, business applications, and customer services such as electronic commerce websites.HA cluster implementations attempt to build redundancy into a cluster to eliminate single points of failure, including multiple network connections and data storage which is redundantly connected via storage area networks.HA clusters usually use a heartbeat private network connection which is used to monitor the health and status of each node in the cluster. One subtle but serious condition all clustering software must be able to handle is split-brain, which occurs when all of the private links go down simultaneously, but the cluster nodes are still running. If that happens, each node in the cluster may mistakenly decide that every other node has gone down and attempt to start services that other nodes are still running. Having duplicate instances of services may cause data corruption on the shared storage.".
- High-availability_cluster thumbnail 2nodeHAcluster.png?width=300.
- High-availability_cluster wikiPageExternalLink citation.cfm?id=1313074.
- High-availability_cluster wikiPageID "2468683".
- High-availability_cluster wikiPageLength "9803".
- High-availability_cluster wikiPageOutDegree "36".
- High-availability_cluster wikiPageRevisionID "682086587".
- High-availability_cluster wikiPageWikiLink API.
- High-availability_cluster wikiPageWikiLink Apache_Cassandra.
- High-availability_cluster wikiPageWikiLink Application_programming_interface.
- High-availability_cluster wikiPageWikiLink Application_software.
- High-availability_cluster wikiPageWikiLink Category:Fault-tolerant_computer_systems.
- High-availability_cluster wikiPageWikiLink Category:High-availability_cluster_computing.
- High-availability_cluster wikiPageWikiLink Category:Quality_control.
- High-availability_cluster wikiPageWikiLink Computer.
- High-availability_cluster wikiPageWikiLink Computer_cluster.
- High-availability_cluster wikiPageWikiLink Computer_network.
- High-availability_cluster wikiPageWikiLink Database.
- High-availability_cluster wikiPageWikiLink Database_management_system.
- High-availability_cluster wikiPageWikiLink Disk_mirroring.
- High-availability_cluster wikiPageWikiLink Distributed_Replicated_Block_Device.
- High-availability_cluster wikiPageWikiLink E-commerce.
- High-availability_cluster wikiPageWikiLink Electric_power.
- High-availability_cluster wikiPageWikiLink Electronic_commerce.
- High-availability_cluster wikiPageWikiLink Failover.
- High-availability_cluster wikiPageWikiLink Heartbeat_(computing).
- High-availability_cluster wikiPageWikiLink Hector_(API).
- High-availability_cluster wikiPageWikiLink High_availability.
- High-availability_cluster wikiPageWikiLink High_availability_software.
- High-availability_cluster wikiPageWikiLink Network-attached_storage.
- High-availability_cluster wikiPageWikiLink OpenSAF.
- High-availability_cluster wikiPageWikiLink Pacemaker_(software).
- High-availability_cluster wikiPageWikiLink Power_supply.
- High-availability_cluster wikiPageWikiLink Redundancy_(engineering).
- High-availability_cluster wikiPageWikiLink SAFplus.
- High-availability_cluster wikiPageWikiLink Server_(computing).
- High-availability_cluster wikiPageWikiLink Service_Availability_Forum.
- High-availability_cluster wikiPageWikiLink Split-brain_(Computing).
- High-availability_cluster wikiPageWikiLink Split-brain_(computing).
- High-availability_cluster wikiPageWikiLink Storage_Area_Network.
- High-availability_cluster wikiPageWikiLink Storage_area_network.
- High-availability_cluster wikiPageWikiLink Uninterruptible_power_supply.
- High-availability_cluster wikiPageWikiLink Urgent_computing.
- High-availability_cluster wikiPageWikiLink Website.
- High-availability_cluster wikiPageWikiLink Websites.
- High-availability_cluster wikiPageWikiLink File:2nodeHAcluster.png.
- High-availability_cluster wikiPageWikiLinkText "Failover Clustering".
- High-availability_cluster wikiPageWikiLinkText "HA Clusters".
- High-availability_cluster wikiPageWikiLinkText "HA clustering".
- High-availability_cluster wikiPageWikiLinkText "High availability systems".
- High-availability_cluster wikiPageWikiLinkText "High-availability cluster".
- High-availability_cluster wikiPageWikiLinkText "failover cluster".
- High-availability_cluster wikiPageWikiLinkText "failover clustering".
- High-availability_cluster wikiPageWikiLinkText "failover".
- High-availability_cluster wikiPageWikiLinkText "ha-cluster".
- High-availability_cluster wikiPageWikiLinkText "high availability storage clusters".
- High-availability_cluster wikiPageWikiLinkText "high availability".
- High-availability_cluster wikiPageWikiLinkText "high-availability cluster".
- High-availability_cluster wikiPageWikiLinkText "high-availability computer clusters".
- High-availability_cluster wikiPageWikiLinkText "high-availability".
- High-availability_cluster wikiPageWikiLinkText "highly available".
- High-availability_cluster hasPhotoCollection High-availability_cluster.
- High-availability_cluster wikiPageUsesTemplate Template:Multiple_issues.
- High-availability_cluster wikiPageUsesTemplate Template:Reflist.
- High-availability_cluster subject Category:Fault-tolerant_computer_systems.
- High-availability_cluster subject Category:High-availability_cluster_computing.
- High-availability_cluster subject Category:Quality_control.
- High-availability_cluster hypernym Groups.
- High-availability_cluster type Article.
- High-availability_cluster type Event.
- High-availability_cluster type Type.
- High-availability_cluster type Article.
- High-availability_cluster type Class.
- High-availability_cluster type Field.
- High-availability_cluster type Type.
- High-availability_cluster type Concept.
- High-availability_cluster comment "High-availability clusters (also known as HA clusters or fail over clusters) are groups of computers that support server applications that can be reliably utilized with a minimum of down-time. They operate by using high availability software to harness redundant computers in groups or clusters that provide continued service when system components fail.".
- High-availability_cluster label "High-availability cluster".
- High-availability_cluster sameAs Clúster_de_alta_disponibilidad.
- High-availability_cluster sameAs پردازش_خوشهای_با_دسترسی_بالا.
- High-availability_cluster sameAs High_Availability.
- High-availability_cluster sameAs 密結合クラスター.
- High-availability_cluster sameAs Sistema_de_alta_disponibilidade.
- High-availability_cluster sameAs m.07g6b0.
- High-availability_cluster sameAs Отказоустойчивый_кластер.
- High-availability_cluster sameAs Q2700956.
- High-availability_cluster sameAs Q2700956.
- High-availability_cluster wasDerivedFrom High-availability_cluster?oldid=682086587.
- High-availability_cluster depiction 2nodeHAcluster.png.
- High-availability_cluster isPrimaryTopicOf High-availability_cluster.