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Group of computers that run with minimum downtime
In computing, high-availability clusters (HA clusters) or fail-over clusters are groups of computers that support server applications that can be reliably
High-availability_cluster
Systems with high up-time, a.k.a. "always on"
phenomenally high availability, which might give the illusion of continuous availability. Systems that exhibit truly continuous availability are comparatively
High_availability
Set of computers configured in a distributed computing system
"supercomputing". "High-availability clusters" (also known as failover clusters, or HA clusters) improve the availability of the cluster approach. They operate
Computer_cluster
Linux distribution for server virtualization
systems is available. Proxmox VE (PVE) can be clustered across multiple server nodes. Since version 2.0, Proxmox VE offers a high availability option for
Proxmox_Virtual_Environment
High-availability cluster software
IBM's solution for high-availability clusters on the AIX Unix and Linux for IBM System p platforms and stands for High Availability Cluster Multiprocessing
IBM High Availability Cluster Multiprocessing
IBM_High_Availability_Cluster_Multiprocessing
Computing with supercomputers and clusters
High-performance computing (HPC) is the use of supercomputers and computer clusters to solve advanced problems. HPC integrates systems administration
High-performance_computing
High-availability cluster software
after being acquired by SIOS Technology, Inc. High availability clusters (HAC) improve application availability by failing them over or switching them over
SIOS_LifeKeeper
High-availability cluster software
The Red Hat Cluster Suite (RHCS) includes software to create a high availability and load balancing cluster. Both can be used on the same system although
Red_Hat_Cluster_Suite
Concept in computing
name spaces referring to different computer IP addresses. High-availability clusters (HA clusters) usually use a heartbeat private network connection which
Split-brain_(computing)
Free software high-availability clustering solution
The Linux-HA (High-Availability Linux) project provides a high-availability (clustering) solution for Linux, FreeBSD, OpenBSD, Solaris and Mac OS X which
Linux-HA
High-availability cluster software
Oracle Solaris Cluster (sometimes Sun Cluster or SunCluster) is a high-availability cluster software product for Solaris, originally created by Sun Microsystems
Solaris_Cluster
High-availability cluster software
websites. High-availability clusters (HAC) improve application availability by failing or switching them over in a group of systems—as opposed to high-performance
Veritas_Cluster_Server
Open source high availability resource manager software
Pacemaker is an open-source high availability resource manager software used on computer clusters since 2004. Until about 2007, it was part of the Linux-HA
Pacemaker_(software)
Clustering standard in computing
Resource agents are currently supported by Linux-HA Heartbeat, the high-availability cluster software. "OpenCF Supporters". Archived from the original on 2005-03-27
Open_Cluster_Framework
Distributed replicated storage system for Linux
and some shell scripts. DRBD is traditionally used in high availability (HA) computer clusters, but beginning with DRBD version 9, it can also be used
DRBD
List of software for cluster management. High-availability cluster Apache Mesos, from the Apache Software Foundation Kubernetes, founded by Google Inc
List of cluster management software
List_of_cluster_management_software
Computer operating system
OpenVMS offers high availability through clustering—the ability to distribute the system over multiple physical machines. This allows clustered applications
OpenVMS
High-availability cluster software
failover and increased availability of applications, or parallel calculating power in case of high-performance computing (HPC) clusters (as in supercomputing)
Microsoft_Cluster_Server
Automatic switching from failed computer system to standby computers
maintenance is done on it. Computer cluster Data integrity Fail-safe Fault-tolerance Fencing (computing) High-availability cluster IT disaster recovery Load balancing
Failover
High-availability cluster software
HP Serviceguard, formerly known as MC/ServiceGuard, is a high-availability cluster software produced by HP that runs on HP-UX and Linux. Serviceguard
HP_Serviceguard
Cluster of IBM mainframes
parallel computing to allow a cluster of up to 32 systems to share a workload for high performance and high availability. In 1990, IBM mainframe computers
IBM_Parallel_Sysplex
Database using graph structures for queries
Docs. Retrieved 2025-08-13. Ewbank, Key. "RedisGraph reaches general availability". I-Programmer.info. "What's new in SAP HANA 2.0 SPS 05". blogs.SAP.com
Graph_database
Storage operating system
Implementers often organize two storage systems in a high-availability cluster with a private high-speed link, either a Fibre Channel, InfiniBand, 10 Gigabit
ONTAP
Defunct clustering system for Linux
node available. OpenSSI is designed to be used for both high performance and high availability clusters. It is possible to create an OpenSSI cluster with
OpenSSI
Set of FOSS tools for Linux based HPC
building clusters using CentOS (v8.3) and openSUSE Leap (v15.2) on x86_64 as well as aarch64 architectures. Free and open-source software portal Cluster manager
OpenHPC
Open-source container software
both on a single master node or on multiple masters supporting high-availability clusters. The various components of the Kubernetes control plane are as
Kubernetes
Sue Ellery and Jim Mason. The company acquired the LifeKeeper high-availability clustering software from NCR Corporation that year, and began targeting
SIOS_Technology_Corp.
high-performance computing (HPC) and high-availability clusters. All file systems listed here focus on high availability, scalability and high performance unless otherwise
List_of_file_systems
Topics referred to by the same term
Hughes Aircraft Company Gorani language (ISO 639-3: hac) Hectare High-availability cluster Honorary Air Commodore Hospital-acquired condition Hot Action
HAC
High-availability software is software used to ensure that systems are running and available most of the time. High availability is a high percentage of
High_availability_software
High-availability clustering solution
TruCluster is a closed-source high-availability clustering solution for the Tru64 UNIX operating system. It was originally developed by Digital Equipment
TruCluster
Load-balancing software
(LVS), where it runs on a host and acts as a load balancer in front of a cluster of real servers. IPVS can direct requests for TCP- and UDP-based services
IP_Virtual_Server
Load-balancing software
The mission of the project is to build a high-performance and highly available server for Linux using clustering technology, which provides good scalability
Linux_Virtual_Server
Computer storage product
Implementers often organize two storage systems in a high-availability cluster with a private high-speed link, either Fibre Channel, InfiniBand, 10 Gigabit
NetApp_FAS
SCST is often combined with RAID, data deduplication and/or high-availability cluster software to augment its functionality. The SCST software stack
SCST
International hardware and software company
any interruption is handled without affecting data. It supports High-availability cluster, redundancy, scalability, replication, disaster recovery and multiple
American_Megatrends
Computer firewall protocol
synchronise firewall states between machines running Packet Filter (PF) for high availability. It is used along with CARP to make sure a backup firewall has the
Pfsync
Packet alteration framework for Linux and the umbrella project for software of the same
conntrack. The userspace daemon conntrackd can be used to enable high availability cluster-based stateful firewalls and collect statistics of the stateful
Netfilter
Form of resilience with independent backup components
one example of its application. Systems science portal High availability High-availability cluster RAID "Redundancy: N+1, N+2 vs. 2N vs. 2N+1". datacenters
N+1_redundancy
Communication platform for organizations
standard, high availability cluster solutions including AIX High Availability Cluster Multi-Processing (HACMP), SUN Solaris Cluster and Microsoft Cluster Server
MessagePlus/Open
first commercially available highly available clustering solutions for commodity hardware. NSC provided a full single-system image cluster: Process migration
UnixWare_NonStop_Clusters
Computer networking protocol
address will be taken by one of the firewall slaves and the service availability will not be interrupted. In the late 1990s the Internet Engineering Task
Common Address Redundancy Protocol
Common_Address_Redundancy_Protocol
reputation. The terms high availability, continuous operation, and continuous availability are generally used to express how available a system is. The following
Continuous_availability
Distributed data processing framework
that stores data on commodity machines, providing very high aggregate bandwidth across the cluster; Hadoop YARN - (introduced in 2012) is a platform responsible
Apache_Hadoop
Group communication system
open source cluster. The Corosync Cluster Engine is a group communication system with additional features for implementing high availability within applications
Corosync_Cluster_Engine
Auto-sharding technology for MySQL databases
designed to provide high availability and high throughput with low latency, while allowing for near linear scalability. MySQL Cluster is implemented through
MySQL_Cluster
High-performance computer cluster
HPCC (High-Performance Computing Cluster), also known as DAS (Data Analytics Supercomputer), is an open source, data-intensive computing system platform
HPCC
Israeli computer scientist
asynchronous distributed systems, atomic broadcasting, high availability and high-availability clusters, and Byzantine fault tolerance. Dolev–Yao model was
Danny_Dolev
Consensus algorithm
maintain a steady leader over time, in order to have a perfect availability of the cluster. Stability is ensured by respecting the timing requirement of
Raft_(algorithm)
Topics referred to by the same term
for excellence in student journalism Pacemaker (software), a high-availability cluster resource manager Pacemaker, a fictional talk-radio program Public
Pacemaker_(disambiguation)
is not available, possibly because the overall system is too complex. Safety engineering Data integrity Fault-tolerance High-availability cluster (HA clusters)
Switchover
Software to manage services on a server-cluster
one SC node or on multiple SC nodes, supporting high-availability clusters and service availability. The various components of the OpenSAF control plane
OpenSAF
Backend in computing
other cases the cluster is more related to availability and load balancing than to computational or specific service clusters. List of cluster management software
Cluster_manager
Shared-everything clustering software
introduced in 2001 with Oracle9i. It provides software for clustering and high availability in Oracle database environments. Oracle Corporation includes
Oracle_RAC
Clustered hosting is a type of web hosting that spreads the load of hosting across multiple physical machines, or nodes, increasing availability and decreasing
Clustered_web_hosting
Type of resource record in the Domain Name System (DNS)
host with the lowest "Priority" value first. The system allows high-availability clusters of mail gateways to be built for one domain if necessary. The
MX_record
Open-source network and infrastructure monitoring software
authentication system. Version 6.0 LTS (February 2022) added high-availability clustering for the Zabbix server, Kubernetes monitoring, and a machine-learning-based
Zabbix
Free and open-source database management system
servers. The system prioritizes availability and scalability over consistency, making it particularly suited for systems with high write throughput requirements
Apache_Cassandra
Aspect of computer clusters
smaller number of nodes, before the entire machine is available, or configured. High-availability cluster Performance simulation Supercomputing Computer Organization
Message passing in computer clusters
Message_passing_in_computer_clusters
Java-based HTTP web server environment
achieved through many techniques. Clustering support currently requires the JDK version 1.5 or higher. A high-availability feature has been added to facilitate
Apache_Tomcat
Type of computing cluster
processing to be shared among them. The result is a high-performance parallel computing cluster from inexpensive personal computer hardware. Beowulf
Beowulf_cluster
Version of Windows Server, released in 2008
roles. Server Core can also be used to create a cluster with high availability using failover clustering or network load balancing. Andrew Mason, a program
Windows_Server_2008
installation of a cluster that is composed of 2-8 RecoverPoint appliances. The multiple appliances work together as a high availability cluster. Each appliance
RecoverPoint
Geographic concentration of related businesses
business cluster is a geographic concentration of interconnected businesses, suppliers, and associated institutions in a particular field. Clusters are considered
Business_cluster
Vector quantization algorithm minimizing the sum of squared deviations
clusters in which each observation belongs to the cluster with the nearest mean (cluster centers or cluster centroid). This results in a partitioning of the
K-means_clustering
a database. This allows the construction of high-availability multiply redundant database servers. Cluster connections can span upwards of 500 miles (800 km)
VMScluster
AR/9912010. T Barclay; J Gray; W Chong (2004). TerraServer Bricks–A High Availability Cluster Alternative. Citeseer. CiteSeerX 10.1.1.59.3626. v t e
Geoplexing
Apple rack-mounted server
server, web server or run high-performance computing applications in clusters – a dedicated cluster Xserve, the Xserve Cluster Node, without a video card
Xserve
Synchronization primitive for fault tolerance
of the common techniques in mission critical systems for providing high availability and fault tolerance of network services by detecting the network or
Heartbeat_(computing)
Copy-on-write file system
can be configured for optimal functionality. Can be used for high availability clusters and computing, although not fully designed for this use. One major
ZFS
technology centers Cambridge Cluster: The name given to the region around Cambridge, England, which is home to a large cluster of high-tech businesses focusing
List_of_technology_centers
Type of database system
com. Retrieved 2018-05-07. "ISelfSchooling - What is cluster table - Index Cluster and Hash Cluster". Archived from the original on 2014-05-14. Retrieved
Online_transaction_processing
SQL database engine software
can be spread across a number of distributed server clusters. Oracle MySQL offers a high availability solution with a mix of tools including the MySQL router
MySQL
Theorem in theoretical computer science
partitioned, i.e. the system cannot ensure availability. In the absence of partitions, both consistency and availability can be satisfied. PACELC therefore goes
PACELC_design_principle
Discontinued security software
Enterprise editions, with Enterprise-grade functionality such as High-Availability Clustering not included in the Standard Edition. ISA Server 2000 required
Microsoft Forefront Threat Management Gateway
Microsoft_Forefront_Threat_Management_Gateway
Sharing information to ensure consistency in computing
primary-backup or primary-replica scheme, which is predominant in high-availability clusters. In comparison, if any replica can process a request and distribute
Replication_(computing)
beliefs are common. Those with the disorder often score high on measures for self-disorder. Cluster B personality disorders are characterized by dramatic
Classification of personality disorders
Classification_of_personality_disorders
List of cluster management software Computer cluster Grid computing World Community Grid Distributed computing Distributed resource management High-Throughput
Comparison of cluster software
Comparison_of_cluster_software
Calendaring and mail server
additional high-availability feature called SCR (Standby Continuous Replication). Unlike CCR, which requires that both servers belong to a Windows cluster typically
Microsoft_Exchange_Server
Globular cluster in the constellation Hercules
called the Great Globular Cluster in Hercules, the Hercules Globular Cluster, or the Great Hercules Cluster), is a globular cluster of several hundred thousand
Messier_13
Form of ballooning
equipped with vents enabling altitude control, cluster balloons are multiple, small, readily available and individually sealed balloons. To control flight
Cluster_ballooning
Event metadata
heartbeat network uses timestamping to monitor the nodes on a high availability computer cluster. Timestamping computer files (updating the timestamp in the
Timestamping_(computing)
Quality of robustness of computer hardware
Reliability, availability and serviceability (RAS), also known as reliability, availability, and maintainability (RAM), is a computer hardware engineering
Reliability, availability and serviceability
Reliability,_availability_and_serviceability
Component whose failure will disrupt the entire system
a load balancer to ensure high availability for a server cluster at the system level. In a high-availability server cluster, each individual server may
Single_point_of_failure
Two colliding clusters of galaxies in constellation Carina
The Bullet Cluster (1E 0657-56) consists of two colliding clusters of galaxies. Strictly speaking, the name Bullet Cluster refers to the smaller subcluster
Bullet_Cluster
Type of distributed computing architecture
satisfied by a single node (processor/memory/storage unit) in a computer cluster. The intent is to eliminate contention among nodes. Nodes do not share
Shared-nothing_architecture
Linux-distro for high-performance computing clusters
Rocks Cluster Distribution (originally NPACI Rocks) is a Linux distribution intended for high-performance computing (HPC) clusters. It was started by National
Rocks_Cluster_Distribution
Set of cloud computing services
CDN were moved into general availability on August 1, 2012. HP Cloud DNS as a Service was moved into general availability on July 1, 2013. The two business
HP_Cloud
computer clusters is best captured by a footnote in Greg Pfister's In Search of Clusters: "Virtually every press release from DEC mentioning clusters says
History_of_computer_clusters
Distributed database management system
resources allocated to the existing nodes). It can provide high levels of resilience and availability and can be run in a variety of environments such as bare
CockroachDB
Method of database replication
Cloudant clusters use multi-master replication to stay in sync with each other and provide high availability to API consumers. eXtremeDB Cluster is the
Multi-master_replication
Type of decentralized filesystem
node in a cluster can create a single point of failure that can result in data loss or unavailability. Fault tolerance and high availability can be provided
Clustered_file_system
1980–2014 American multinational software and services company
on NetWare Business Continuity Clustering automates the configuration and management of high-availability, clustered servers Client for Linux gives Linux
Novell
Radio transmissions consisting of only a single repeating Morse code letter
Beacons" SLHFB, or "Single Letter High Frequency Beacons" SLHFM, or "Single Letter High Frequency Markers" Cluster beacons MX — an ENIGMA and ENIGMA-2000
Letter_beacon
Open-source NoSQL database
JSON document access, with low latency and high sustainability throughput. It is designed to be clustered from a single machine to very large-scale deployments
Couchbase_Server
Control panel in front of a vehicle operator
an electronic instrument cluster, digital instrument panel, digital dash, digital speedometer or digital instrument cluster. By analogy, a succinct display
Dashboard
Collection of computer servers
Server farms are commonly used for cluster computing. Many modern supercomputers comprise giant server farms of high-speed processors connected by either
Server_farm
On-demand cloud computing provider
allows users to have at their disposal a virtual cluster of computers, with extremely high availability, which can be interacted with over the internet
Amazon_Web_Services
Clustering using tree-based data aggregation
main memory. As a result, there was a lot of overhead maintaining high clustering quality while minimizing the cost of additional IO (input/output) operations
BIRCH
Computer network operating system
While NetWare 3.x was current, Novell introduced its first high-availability clustering system, named NetWare SFT-III, which allowed a logical server
NetWare
HIGH AVAILABILITY-CLUSTER
HIGH AVAILABILITY-CLUSTER
Surname or Lastname
English (chiefly Yorkshire)
English (chiefly Yorkshire) : topographic name for someone who lived by a hedged or fenced enclosure (Old English haga), or a habitational name from a place named with this word (or its Old Norse cognate hagi), especially three places called Haigh, two in West Yorkshire and the other near Manchester.
Girl/Female
Muslim
High
Boy/Male
Irish
Hugh is a translation of an ancient name Aodh meaning “â€fire.â€â€ A name with nationalistic connotations as Hugh O’Neill, Earl of Tyrone and Red Hugh O’Donnell, Earl of Tyrconnell together led a rebellion and won some major battles against the forces of the English queen Elizabeth 1st, before being defeated at the Battle of Kinsale in 1601.
Surname or Lastname
English
English : topographic name for someone who lived at the top of a hill or on a piece of raised ground, from Middle English heyt ‘summit’, ‘height’.
Surname or Lastname
English
English : from the Old French personal name Hu(gh)e, introduced to Britain by the Normans. This is in origin a short form of any of the various Germanic compound names with the first element hug ‘heart’, ‘mind’, ‘spirit’. Compare, for example, Howard 1, Hubble, and Hubert. It was a popular personal name among the Normans in England, partly due to the fame of St. Hugh of Lincoln (1140–1200), who was born in Burgundy and who established the first Carthusian monastery in England.In Ireland and Scotland this name has been widely used as an equivalent of Celtic Aodh ‘fire’, the source of many Irish surnames (see for example McCoy).
Boy/Male
German
High.
Boy/Male
Tamil
Praanshu | பà¯à®°à®¾à®‚à®·à¯
High
Praanshu | பà¯à®°à®¾à®‚à®·à¯
Boy/Male
English
From the hillslope meadow.
Boy/Male
Muslim
High
Boy/Male
Christian & English(British/American/Australian)
Fire
Surname or Lastname
English (chiefly East Anglia and northern England)
English (chiefly East Anglia and northern England) : nickname for a tall man, from Middle English hegh, hie ‘high’, ‘tall’, Old English hēah (compare Hay 2), or a topographic name for a dweller on a hilltop or high place, from the same word used in a topographical sense. This second use is supported by early forms such as Richard atte High (Sussex 1332).
Boy/Male
Indian
High
Girl/Female
Muslim
High
Boy/Male
American, Australian, British, Chinese, Christian, Danish, Dutch, English, French, German, Indian, Irish, Jamaican, Teutonic
Bright Mind; Bright in Mind and Spirit; Intelligent; Heart; Soul; Mind; Spirit
Boy/Male
French Teutonic American Shakespearean English Welsh
Intelligent.
Boy/Male
German
High.
Girl/Female
Muslim
High
Girl/Female
Muslim
High
Male
English
English form of Old French Hugues, HUGH means "heart," "mind," or "spirit."
Boy/Male
English
Son of Hugh.
HIGH AVAILABILITY-CLUSTER
HIGH AVAILABILITY-CLUSTER
Boy/Male
Arabic, Muslim
Precious Stone
Surname or Lastname
English
English : occupational name for a trumpeter, from Old French trumpeur.
Biblical
blackness; heat
Boy/Male
Arabic, Muslim
Eloquent; Father of Speech
Boy/Male
Indian
Courageous; Never seen Before; Lord Shiva
Girl/Female
Tamil
Apraudha | அபà¯à®°à¯Œà®¤à®¾
One who never gets old
Girl/Female
British, English
Powerful; Wealthy
Male
English
Anglicized form of Old Irish Mael-Maedóc, MARMADUKE means "devotee of Maedóc."
Girl/Female
Hindu, Indian
Bestower of Joy; Goddess Durga; A Holy Cow; One who Brings Joy
Girl/Female
American, German
Red Gem Stone Like a Pomegranate
HIGH AVAILABILITY-CLUSTER
HIGH AVAILABILITY-CLUSTER
HIGH AVAILABILITY-CLUSTER
HIGH AVAILABILITY-CLUSTER
HIGH AVAILABILITY-CLUSTER
n.
The flicker; -- called also high-hole.
n.
People of rank or high station; as, high and low.
a.
Strung to a high pitch; spirited; sensitive; as, a high-strung horse.
pl.
of Availability
n.
A laced boot, ankle high.
a.
Of or pertaining to, or favoring, the party called the High Church, or their doctrines or policy. See High Church, under High, a.
superl.
Of noble birth; illustrious; as, of high family.
adv.
On high.
a.
High in tone or sound.
superl.
Of great strength, force, importance, and the like; strong; mighty; powerful; violent; sometimes, triumphant; victorious; majestic, etc.; as, a high wind; high passions.
a.
Elevated; high-principled; honorable.
n.
High-priesthood.
superl.
Possessing a characteristic quality in a supreme or superior degree; as, high (i. e., intense) heat; high (i. e., full or quite) noon; high (i. e., rich or spicy) seasoning; high (i. e., complete) pleasure; high (i. e., deep or vivid) color; high (i. e., extensive, thorough) scholarship, etc.
a.
High as the breast.
superl.
Costly; dear in price; extravagant; as, to hold goods at a high price.
adv.
In a high manner; in a high place; to a great altitude; to a great degree; largely; in a superior manner; eminently; powerfully.
superl.
Elevated in character or quality, whether moral or intellectual; preeminent; honorable; as, high aims, or motives.
superl.
Acute or sharp; -- opposed to grave or low; as, a high note.
adv. & a.
Very high.
superl.
Strong-scented; slightly tainted; as, epicures do not cook game before it is high.