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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
Term in reliability engineering
Normally high availability systems might be specified as 99.98%, 99.999% or 99.9996%. The converse, unavailability, is 1 minus the availability. The simplest
Availability
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
Network protocol for Ethernet that provides seamless failover
High-availability Seamless Redundancy (HSR) is a network protocol for Ethernet that provides seamless failover against failure of any single network component
High-availability Seamless Redundancy
High-availability_Seamless_Redundancy
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
SQL database engine software
December 2009. "MySQL :: MySQL Enterprise High Availability". www.mysql.com. Retrieved 9 March 2019. "High Availability & Performance Tuning". MariaDB KnowledgeBase
MySQL
Subset of an IT infrastructure system that shares no service-critical components
availability region is a group of data centres that are located in the same geographical region. Availability regions comprise multiple availability zones
Availability_zone
Measure of power plant productivity
electricity. In the field of reliability engineering, availability factor is known as operational availability, A o {\displaystyle A_{o}} . The capacity factor
Availability_factor
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
Acronym for a common web hosting solution
database (master) and its copies (slaves). Such high-availability setups may also improve the availability of LAMP instances by providing various forms of
LAMP_(software_bundle)
Java-based HTTP web server environment
Clustering support currently requires the JDK version 1.5 or higher. A high-availability feature has been added to facilitate the scheduling of system upgrades
Apache_Tomcat
Need to sacrifice consistency or availability in the presence of network partitions
definition of availability in CAP theorem as defined by Gilbert and Lynch. Availability as defined in CAP theorem is different from high availability in software
CAP_theorem
Consistency model used in distributed computing to achieve high availability
consistency is a consistency model used in distributed computing to achieve high availability. An eventually consistent system ensures that if no new updates are
Eventual_consistency
Engineering characterization of a product or system
points High availability Risk assessment Reliability-centered maintenance Safety instrumented system Safety integrity level Reliability, availability and
Reliability, availability, maintainability and safety
Reliability,_availability,_maintainability_and_safety
Bias towards recently acquired information
The availability heuristic, also known as availability bias, is a mental shortcut that relies on immediate examples that come to a given person's mind
Availability_heuristic
Facility used to house computer servers
centers. Various metrics exist to measure the data-availability that results from data-center availability beyond 95% uptime, with the top of the scale counting
Data_center
Proprietary database management system
media recovery. Oracle Database includes several technologies for high availability, disaster recovery, and scale. Oracle Real Application Clusters allows
Oracle_Database
Probability a system works when required
are two kinds of availability. Operational Predicted Operational availability is presumed to be the same as predicted availability until after operational
Availability_(system)
reputation. The terms high availability, continuous operation, and continuous availability are generally used to express how available a system is. The following
Continuous_availability
Defined levels of resiliency and redundancy for IT infrastructure
multiple availability zones to distribute their services geographically, achieving resilience across multiple physical sites.[citation needed] Availability zone
Data_center_tiers
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
Concept in computing
in both name spaces referring to different computer IP addresses. High-availability clusters (HA clusters) usually use a heartbeat private network connection
Split-brain_(computing)
Software architecture design method
In information technology, high-availability application architecture is a process followed when implementing a new application into an existing business-wide
High-availability application architecture
High-availability_application_architecture
Internet ecosystem layer that addresses bottlenecks
network of proxy servers and corresponding data centers. CDNs provide high availability and performance ("speed") through geographical distribution relative
Content_delivery_network
Set of computers configured in a distributed computing system
availability over that of a single computer, while typically being much more cost-effective than single computers of comparable speed or availability
Computer_cluster
On-demand cloud computing provider
at their disposal a virtual cluster of computers, with extremely high availability, which can be interacted with over the internet via REST APIs, a CLI
Amazon_Web_Services
Protecting information by mitigating risk
used to access it must be functioning correctly. High availability systems aim to remain available at all times, preventing service disruptions due to
Information_security
Computing with supercomputers and clusters
Quantum computing Metacomputing Grand Challenge High Productivity Computing Systems High-availability cluster High-throughput computing Many-task computing Supercomputing
High-performance_computing
Free and open-source object relational database management system
features, such as graphical user interfaces or load balancing and high availability toolsets. The large third-party PostgreSQL support network of people
PostgreSQL
Distributed data processing framework
and support for non-POSIX operations such as Append. In May 2012, high-availability capabilities were added to HDFS, letting the main metadata server
Apache_Hadoop
Logical volume management system
HA-LVM Cluster-awareness is left to the application providing the high availability function. For the LVM's part, HA-LVM can use CLVM as a locking mechanism
Logical Volume Manager (Linux)
Logical_Volume_Manager_(Linux)
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
Explanation for types of collective belief
the availability cascade was first developed by Timur Kuran and Cass Sunstein as a variation of information cascades mediated by the availability heuristic
Availability_cascade
AT&T/Bell family of computers
AT&T UNIX operating system and were named after the successful 3B20D High Availability processor. In 1984, after regulatory constraints were lifted, AT&T
3B_series_computers
Topics referred to by the same term
functions in mathematics Hallstatt culture, an archaeological culture High availability, systems design and implementation with a view to maximising service
Ha
maintenance that could cause disruption of service may be performed. For a high-availability service, such as an Internet hosting service or Internet service provider
Maintenance_window
Design for Availability is the design process for a system targeting availability of the system for guarantying readiness as the major part of goal specification
Design_for_availability
Calendaring and mail server
for Exchange Server 2007. This service pack includes an additional high-availability feature called SCR (Standby Continuous Replication). Unlike CCR, which
Microsoft_Exchange_Server
Data management company
2021; 4 years ago (2021-08-23) Operating system Windows, Linux, Unix, Mac Available in 10 languages List of languages English, Chinese (Simplified), Chinese
Arcserve
Free and open-source proxy software
HAProxy is a free and open source software that provides a high availability load balancer and proxy (forward proxy, reverse proxy) for TCP and HTTP-based
HAProxy
Component whose failure will disrupt the entire system
function without it. SPOFs are undesirable in any system with a goal of high availability or reliability, be it a business practice, software application, or
Single_point_of_failure
is available for Linux under the GPL. Distributed File System (Dfs) from Microsoft focuses on location transparency and high availability. Available for
List_of_file_systems
Electric power transmission system
in conversion, switching, control, availability, and maintenance. HVDC is less reliable and has lower availability than alternating current (AC) systems
High-voltage_direct_current
Open-source container software
run both on a single master node or on multiple masters supporting high-availability clusters. The various components of the Kubernetes control plane are
Kubernetes
System for grading the railway network of Great Britain
route availability for a line is calculated by taking into account bridge strength, track condition, structural issues and so on. A route availability of
Route_availability
Maintaining or reestablishing vital information technology infrastructure
and real-time processing. Availability of IT systems became more important. Regulatory agencies became involved; availability objectives of 2, 3, 4 or
IT_disaster_recovery
the mailbox server participates in a Database Availability Group. However, since Database Availability Groups use Windows Failover Clustering, and Microsoft
History of Microsoft Exchange Server
History_of_Microsoft_Exchange_Server
Electrical device that uses batteries to prevent any interruption of power flow
ISBN 0-7803-7512-2, S2CID 195862090 Detailed explanation of UPS topologies "High-Availability Power Systems, Part I: UPS Internal Topology" (PDF). November 2000
Uninterruptible_power_supply
Consensus algorithm
Subsystem". docs.hazelcast.com. Retrieved 2022-12-24. "Cloud native high availability with IBM MQ". community.ibm.com. 25 March 2021. Retrieved 2021-05-25
Raft_(algorithm)
Data storage technology
data striping and redundant, online disks, it was common for high-capacity, high-availability data storage to rely on so-called SLEDs ("single, large, expensive
RAID
Joint hierarchical database made by IBM
enhance availability and handle large data volumes effectively. IMS V9 introduced online reorganization for HALDBs, supporting continuous availability and
IBM Information Management System
IBM_Information_Management_System
Authentication scheme
sign-on also increases dependence on highly-available authentication systems; a loss of their availability can result in denial of access to all systems
Single_sign-on
Amount of useful work accomplished by a computer
benchmarks are available. Availability of a system is typically measured as a factor of its reliability. As reliability increases, so does availability (that is
Computer_performance
Maintenance service of electronic consumers
to provide technical support, outsourcing allows them to maintain high availability of service, especially during peak demand or product launches. Such
Technical_support
Topics referred to by the same term
commonly taken to mean "99.999%", may refer to: High availability of services, when a service is available for 99.999% of the time, or around 5 minutes of
Five_nines
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
Distributed database
Oracle Berkeley DB Java Edition high-availability storage engine. It adds services to provide a distributed, highly available key/value store, suited for
Oracle_NoSQL_Database
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
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)
off-the-shelf (COTS) technology. Service availability is an extension of high availability, referring to services that are available regardless of hardware, software
Service_Availability_Forum
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
Computer network design model
ISBN 978-1-57870-084-4 High Availability Campus Network Design, Cisco, 2008, retrieved 2022-04-05 PDF Haviland, Geoff (1998). "Designing High-Performance Campus
Hierarchical internetworking model
Hierarchical_internetworking_model
Relational model database server
(general availability) of V4. It introduced "data sharing": several DB2 engines access the same data. Advantages: performance and availability (if one
IBM_Db2
Distributed replicated storage system for Linux
applications, and some shell scripts. DRBD is traditionally used in high availability (HA) computer clusters, but beginning with DRBD version 9, it can
DRBD
Use of software engineering practices for IT
engineering and IT infrastructure support that monitors and improves the availability and performance of deployed software systems and large software services
Site_reliability_engineering
Relational database management system
in-memory, relational database management system with persistence and high availability. Originally designed and implemented at Hewlett-Packard labs in Palo
TimesTen
Type of computing virtualization
explicit coupling with specific equipment, therefore availability is defined by the availability of VNF services. Because NFV technology can virtualize
Network function virtualization
Network_function_virtualization
Time-sharing operating system
limited success. Multics has numerous features intended to ensure high availability so that it would support a computing utility similar to the telephone
Multics
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
Cluster of IBM mainframes
allow a cluster of up to 32 systems to share a workload for high performance and high availability. In 1990, IBM mainframe computers introduced the concept
IBM_Parallel_Sysplex
American computer manufacturer
applications across high-availability virtual machines, freeing up existing x86 servers. The two servers comprising the Avance high-availability platform may
Stratus_Technologies
Corporation. It is claimed to be intended for systems that require high availability, high scalability and low latency, particularly in cases when traditional
Oracle_Coherence
Communication platform for organizations
large organizations designed specifically to handle high volumes of traffic within a high-availability environment. Currently supported communication channels
MessagePlus/Open
Network protocol standard for Ethernet seamless failover
of IEC 61850. PRP and HSR are suited for applications that request high availability and short switchover time, such as: protection for electrical substation
Parallel_Redundancy_Protocol
Form of resilience with independent backup components
Redundancy is a form of resilience that ensures system availability in the event of component failure. Components (N) have at least one independent backup
N+1_redundancy
High-availability cluster software
by Red Hat MRG. The High Availability Add-On is Red Hat's implementation of Linux-HA. It attempts to ensure service availability by monitoring other nodes
Red_Hat_Cluster_Suite
Automatic switching from failed computer system to standby computers
failover capability in servers, systems or networks requiring high availability and a high degree of reliability. At the server level, failover automation
Failover
Load-balancing software
(GPL), version 2. The mission of the project is to build a high-performance and highly available server for Linux using clustering technology, which provides
Linux_Virtual_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)
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
American computer company, 1982–2010
processors. The M-class SPARC Enterprise systems include high-end reliability and availability features. Later T-series servers have also been badged SPARC
Sun_Microsystems
Duplication of critical components to increase reliability of a system
many others to provide geographic redundancy, high availability, fault tolerance and to ensure availability and reliability for their cloud services. As
Redundancy_(engineering)
terminusdb/terminusdb-server, TerminusDB, 2020-05-19, retrieved 2020-05-19 Siwiec, J.E.: A High-Performance DB/DC System;IBM, G321-5051, 1978 "Stackshare Top In-Memory Databases"
List_of_in-memory_databases
the original on 2015-01-18. Retrieved 2015-01-08. Redis Persistence high availability - Redis master/slave replication - single point of failure? - Stack
Comparison of structured storage software
Comparison_of_structured_storage_software
Cloud-based NoSQL database service
database service offered by Microsoft. It is designed to provide high availability, scalability, and low-latency access to data for modern applications
Cosmos_DB
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
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
connections were load-balanced between the available cluster nodes. The NSC system was designed for high availability—all system services were either redundant
UnixWare_NonStop_Clusters
Software for, carrier-grade, hardware management
and a managed hot-swap interface. It aims for service availability beyond high availability (HA) expectations. The OpenHPI project was conceived by
OpenHPI (Service Availability)
OpenHPI_(Service_Availability)
Recorded state of a computer storage system at a particular point in time
for low-availability systems (on desktop computers and small workgroup servers, on which regular downtime is acceptable). High-availability 24/7 systems
Snapshot_(computer_storage)
Clustering standard in computing
Resource agents are currently supported by Linux-HA Heartbeat, the high-availability cluster software. "OpenCF Supporters". Archived from the original
Open_Cluster_Framework
Database management system
embedded systems. The initial product was later joined by eXtremeDB High Availability (HA) for fault-tolerant applications. The eXtremeDB family now includes
Embedded_database
Fitzgerald, 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.
Rechargeable battery type often used in motor vehicles
power supplies in telecommunications networks such as for cell sites, high-availability emergency power systems as used in hospitals, and stand-alone power
Lead–acid_battery
communications service providers that is designed for scalability, high performance and high availability. On December 5, 2014, the Open Networking Lab (ON.Lab) along
ONOS
High explosive artillery round
modern high explosive rounds, it continues to be used by many countries, in particular in training exercises because of its low cost, high availability and
M107_projectile
Defunct clustering system for Linux
directed to the least loaded node available. OpenSSI is designed to be used for both high performance and high availability clusters. It is possible to create
OpenSSI
Open specification
can provide continuous Service Availability. Additional features common in hardware platforms used for high-availability applications include online serviceability
Hardware_Platform_Interface
Resilience of systems to component failures or errors
of one or more faulty components. This capability is essential for high-availability, mission-critical, or even life-critical systems. Fault tolerance
Fault_tolerance
Open-source DHCP server
Environment (PXE) boot, client classification, shared networks, and high-availability (failover pairs). Kea can store leases locally in a memfile, or in
Kea_(software)
HIGH AVAILABILITY
HIGH AVAILABILITY
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
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 (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.
Boy/Male
German
High.
Boy/Male
Muslim
High
Girl/Female
Muslim
High
Boy/Male
Tamil
Praanshu | பà¯à®°à®¾à®‚à®·à¯
High
Praanshu | பà¯à®°à®¾à®‚à®·à¯
Boy/Male
Indian
High
Girl/Female
Muslim
High
Boy/Male
French Teutonic American Shakespearean English Welsh
Intelligent.
Boy/Male
English
From the hillslope meadow.
Boy/Male
German
High.
Boy/Male
English
Son of Hugh.
Male
English
English form of Old French Hugues, HUGH means "heart," "mind," or "spirit."
Girl/Female
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).
Girl/Female
Muslim
High
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).
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’.
HIGH AVAILABILITY
HIGH AVAILABILITY
Boy/Male
Indian
Lord of Eswaran
Male
English
Variant spelling of English Jalen, JAYLIN means "God lodges" or "passing the night; tarrying."
Boy/Male
Spanish
Twin.
Boy/Male
Muslim
Tourist, Who visits holy places
Girl/Female
French, German
Little and Womanly
Boy/Male
Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Lord Rama; Speaker of Truth
Girl/Female
Indian
Sweet Sound
Girl/Female
Indian, Telugu
Crystal; Pure
Male
Greek
(ἈβειÏὼν) Greek form of Hebrew Abiyram, ABIRON means "my father is exalted." In the bible, this is the name of the eldest son of Hiel the Bethelite, and the name of a son of Eliab who joined Korah in his rebellion against Moses. Also spelled Abeiron.
Girl/Female
Arabic, Swedish
Light
HIGH AVAILABILITY
HIGH AVAILABILITY
HIGH AVAILABILITY
HIGH AVAILABILITY
HIGH AVAILABILITY
a.
High in tone or sound.
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.
superl.
Of great strength, force, importance, and the like; strong; mighty; powerful; violent; sometimes, triumphant; victorious; majestic, etc.; as, a high wind; high passions.
superl.
Acute or sharp; -- opposed to grave or low; as, a high note.
superl.
Elevated in character or quality, whether moral or intellectual; preeminent; honorable; as, high aims, or motives.
a.
Of or pertaining to, or favoring, the party called the High Church, or their doctrines or policy. See High Church, under High, a.
n.
The flicker; -- called also high-hole.
superl.
Of noble birth; illustrious; as, of high family.
superl.
Costly; dear in price; extravagant; as, to hold goods at a high price.
n.
People of rank or high station; as, high and low.
adv. & a.
Very high.
adv.
On high.
adv.
In a high manner; in a high place; to a great altitude; to a great degree; largely; in a superior manner; eminently; powerfully.
a.
Strung to a high pitch; spirited; sensitive; as, a high-strung horse.
a.
High as the breast.
n.
One who holds high-church principles.
a.
Elevated; high-principled; honorable.
n.
High-priesthood.
n.
A laced boot, ankle high.
superl.
Strong-scented; slightly tainted; as, epicures do not cook game before it is high.