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- High-availability_cluster abstract "High-availability clusters (also known as HA clusters or failover clusters) are groups of computers that support server applications that can be reliably utilized with a minimum of down-time. They operate by harnessing 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 wikiPageRevisionID "595035392".
- High-availability_cluster hasPhotoCollection High-availability_cluster.
- 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 type Artifact100021939.
- High-availability_cluster type ComputerSystem103085915.
- High-availability_cluster type Fault-tolerantComputerSystems.
- High-availability_cluster type Instrumentality103575240.
- High-availability_cluster type Object100002684.
- High-availability_cluster type PhysicalEntity100001930.
- High-availability_cluster type System104377057.
- High-availability_cluster type Whole100003553.
- High-availability_cluster comment "High-availability clusters (also known as HA clusters or failover clusters) are groups of computers that support server applications that can be reliably utilized with a minimum of down-time. They operate by harnessing 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.".
- High-availability_cluster label "Clúster de alta disponibilidad".
- High-availability_cluster label "High Availability".
- High-availability_cluster label "High-availability cluster".
- High-availability_cluster label "Sistema de alta disponibilidade".
- High-availability_cluster label "密結合クラスター".
- High-availability_cluster sameAs Clúster_de_alta_disponibilidad.
- 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 Q2700956.
- High-availability_cluster sameAs Q2700956.
- High-availability_cluster sameAs High-availability_cluster.
- High-availability_cluster wasDerivedFrom High-availability_cluster?oldid=595035392.
- High-availability_cluster depiction 2nodeHAcluster.png.
- High-availability_cluster isPrimaryTopicOf High-availability_cluster.
