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Automatic switching from failed computer system to standby computers
Failover is switching to a redundant or standby computer server, system, hardware component or network upon the failure or abnormal termination of the
Failover
Group of computers that run with minimum downtime
system without requiring administrative intervention, a process known as failover. As part of this process, clustering software may configure the node before
High-availability_cluster
Wireless failover is an automated function in telephone networks and computer networks where a standard hardwired connection is switched to a redundant
Wireless_failover
Form of resilience with independent backup components
availability) during failover is dependent on a specific solution, though degradation to system resilience will occur during failover. It is also possible
N+1_redundancy
Network system for establishing a fault-tolerant default gateway
establishes an association between gateways in order to achieve default gateway failover if the primary gateway becomes inaccessible. HSRP gateways send multicast
Hot_Standby_Router_Protocol
Cloud-based distributed SQL DBMS service
transactions, strongly consistent reads, and automatic multi-site replication and failover. Spanner is used in Google F1, the database for its advertising business
Spanner_(database)
Network protocol standard for Ethernet seamless failover
(PRP) is a network protocol standard for Ethernet that provides seamless failover against failure of any network component. This redundancy is invisible
Parallel_Redundancy_Protocol
Verifying software recovery from crashes
causing failures in a controlled environment. Following a failure, the failover mechanism is tested to ensure that data is not lost or corrupted and that
Recovery_testing
without human intervention, is called failover. Manual switchover on error would be used if automatic failover is not available, possibly because the
Switchover
Principal protocol used to assign IPv4 addresses on an IPv4 network
Dooley, Michael; Kapur, Arun (March 2003). DHCP Failover Protocol. IETF. I-D draft-ietf-dhc-failover-12. Retrieved May 9, 2010. Weinberg, Neal (2018-08-14)
Dynamic Host Configuration Protocol
Dynamic_Host_Configuration_Protocol
Administrator to write code or scripts to perform the work. Although the actual failover mechanism in log shipping is manual, this implementation is often chosen
Log_shipping
Software that emulates an entire computer
[citation needed] Similar to the migration mechanism described above, failover allows the VM to continue operations if the host fails. Generally it occurs
Virtual_machine
users to manage their DNS traffic via specified protocols such as: DNS failover, dynamic IP addresses, SMTP authentication, and GeoDNS. Public recursive
List_of_managed_DNS_providers
Suite of technologies
application availability and reliability through its ability to seamlessly "failover" to a secondary device in the event of a hardware or software failure.
Application_delivery_network
Open source message broker
server is built on the Open Telecom Platform framework for clustering and failover. Client libraries to interface with the broker are available for all major
RabbitMQ
Version of Windows Server, released in 2008
Core can also be used to create a cluster with high availability using failover clustering or network load balancing. Andrew Mason, a program manager on
Windows_Server_2008
Digital workload distribution techniques
"stickiness". A significant downside to this technique is its lack of automatic failover: if a backend server goes down, its per-session information becomes inaccessible
Load_balancing_(computing)
merged out). Migration is similar to the failover capability some virtualization suites provide. In true failover, the host may have suddenly completely
Migration_(virtualization)
Relational database management system
support for High-Availability with two-level auto failover: the broker failover and server failover. When connecting to a broker via a client API, users
CUBRID
Type of cyber-attack
and remediate DoS attacks through automatic rate filtering and WAN Link failover and balancing. These schemes will work as long as the DoS attacks can be
Denial-of-service_attack
Sharing information to ensure consistency in computing
Through replication, systems can continue operating when components fail (failover), serve requests from geographically distributed locations, and balance
Replication_(computing)
Cluster Shared Volumes (CSV) is a feature of Failover Clustering first introduced in Windows Server 2008 R2 for use with the Hyper-V role. A Cluster Shared
Cluster_Shared_Volumes
File transfer software
transfer data, as well as providing automation services, analytics and failover options. The software has been used in the healthcare industry by companies
MOVEit
Form of shared internet-based computing
tier. Advanced redundancy strategies, such as cross-region replication or failover systems, typically require explicit configuration and may incur additional
Cloud_computing
Open-source forum software
PostgreSQL and SQLite as database systems and, in addition, has database failover support. It is available in multiple languages and is licensed under the
MyBB
Cryptographic protocols for securing data in transit
Document RFC 8446 to keep it as secure as possible; it is to be seen as a failover protocol now, meant only to be negotiated with clients which are unable
Transport_Layer_Security
Distributed data processing framework
OL 25423189M. "Version 2.0 provides for manual failover and they are working on automatic failover". Hadoop.apache.org. Archived from the original on
Apache_Hadoop
Network protocol for Ethernet that provides seamless failover
Redundancy (HSR) is a network protocol for Ethernet that provides seamless failover against failure of any single network component. PRP and HSR are independent
High-availability Seamless Redundancy
High-availability_Seamless_Redundancy
Networking protocol for clock synchronization
Mandatory Optional SNTP is intended for a single upstream server with no failover logic. State tracking Mandatory Optional SNTP can operate in a stateless
Network_Time_Protocol
A hot spare or warm spare or hot standby is a component used as a failover mechanism to provide reliability in system configurations. The hot spare is
Hot_spare
a Berkeley DB backend. Zope Replication Services (ZRS) is a commercial failover add-on, open-sourced since May 2013, that eliminates the single point of
Zope_Object_Database
Network communication protocol for providing shared access to resources
SMB Multichannel (multiple connections per SMB session), SMB Transparent Failover It also introduces several security enhancements, such as end-to-end encryption
Server_Message_Block
Network monitoring software
the Failover will automatically take over monitoring duties. Satellite Monitoring Services can automatically switch to the newly active Failover server
PA_Server_Monitor
Company that manufactures out-of-band management systems
provide always-available wired and wireless secure remote access, with failover capabilities to automatically restore site connectivity. This enables technical
Opengear
Content delivery network by Netflix
Netflix traffic to be delivered from a particular site The availability and failover options that can be implemented at that site Open Connect is a combination
Open_Connect
Software component of IBM WebSphere
provides support for WOLA resource failover as part of the general support for JCA resource failover. Invocation of the failover occurs when a configurable threshold
WebSphere Optimized Local Adapters
WebSphere_Optimized_Local_Adapters
Computer network protocol
Capability negotiation Application layer acknowledgements; Diameter defines failover methods and state machines (RFC 3539) Extensibility; new commands can be
Diameter_(protocol)
Using multiple network connections in parallel to increase capacity and reliability
not all implementations take advantage of this. Most methods provide failover as well. Combining can either occur such that multiple interfaces share
Link_aggregation
Computer networking protocol
network to share a set of IP addresses. Its primary purpose is to provide failover redundancy, especially when used with firewalls and routers. In some configurations
Common Address Redundancy Protocol
Common_Address_Redundancy_Protocol
Authentication scheme
all systems unified under the SSO. SSO can be configured with session failover capabilities in order to maintain the system operation. Nonetheless, the
Single_sign-on
Systems with high up-time, a.k.a. "always on"
upgraded without compromising service availability (see load balancing and failover). High availability requires less human intervention to restore operation
High_availability
Wireless mesh networking brand
Signal, a USB-C cellular backup dongle with a built-in eSIM that provides failover connectivity. Eero Signal is available in both 4G LTE and 5G RedCap models;
Eero (wireless networking brand)
Eero_(wireless_networking_brand)
Proprietary database management system
Database Vault, Online Indexing, Advanced Compression, Data Guard Fast-Start Failover, Transparent Data Encryption Unsupported: Oracle Database 10g Release 1
Oracle_Database
Distributed application structure in computing
must be scaled appropriately to the expected workload. Load-balancing and failover systems are often employed to scale the server beyond a single physical
Client–server_model
Multi-model database
Encrypted backups. Deployment mode for single servers with automatic failover. Release Notes 3.2 2017-07-20 3.2.18 2019-02-02 Distributed iterative graph
ArangoDB
High-availability cluster software
allows server computers to work together as a computer cluster, to provide failover and increased availability of applications, or parallel calculating power
Microsoft_Cluster_Server
Load-balancing technique in the Internet's Domain Name System (DNS)
2019. Feenberg, Daniel (July 25, 2016). "DNS round robin for web server failover". Retrieved January 10, 2020. "What is the difference among a multivalue
Round-robin_DNS
Calendaring and mail server
is opposed to Exchange's more common active-passive mode in which the failover servers in any cluster node cannot be used at all while their corresponding
Microsoft_Exchange_Server
Room containing computer servers
heat, humidity, and dust, but also the need for very high resilience and failover requirements. Maintaining a stable temperature and humidity within tight
Server_room
Method of database replication
multi-master replication. Multi-master replication can also be contrasted with failover clustering where passive replica servers are replicating the master data
Multi-master_replication
Domain name system software project
simple BIND style zonefiles to relational databases and load balancing/failover algorithms. PowerDNS development began in 1999 and was originally a commercial
PowerDNS
Available 24 hours a day, seven days a week
standards of overall reliability. Critical infrastructure may be supported by failover systems, electric generators, and satellite communications. In the event
24/7_service
supported for evaluation purposes[citation needed]). Failover can be manual or automatic; automatic failover requires a witness partner and an operating mode
History of Microsoft SQL Server
History_of_Microsoft_SQL_Server
Free and open-source Unix-like operating system
from OpenBSD, allowing several nodes to share a set of IP addresses for failover. FreeBSD is used as the basis for network-appliance systems including pfSense
FreeBSD
Satellite company
Geostationary (GEO) satellites, and 5G/4G/LTE terrestrial networks for automatic failover and connectivity, even in remote places. Headquartered in Fort Lauderdale
Maritime Telecommunications Network
Maritime_Telecommunications_Network
utility does not take any time to switch over, although the total time for failover is dependent on how long the underlying disk driver retries the command
Dynamic_multipathing
American cloud-based application delivery platform
mitigation, content caching, application delivery, load balancing and failover services. Incapsula was founded in 2009 by Gur Shatz and Marc Gaffan
Incapsula
Server software for macOS
High-availability features Automatic recovery File system journaling IP failover (dropped in OS X 10.7 and later) Software RAID Disk space monitor File
Mac_OS_X_Server
Native hypervisor by Microsoft
Significant feature and performance improvements to Storage Spaces Direct and Failover Clustering Hyper-V in Windows Server 2022 added: nested virtualization
Hyper-V
Microsoft technology for storage snapshots
(§ History) Windows software and services that support VSS include Windows Failover Cluster, Windows Server Backup, Hyper-V, Virtual Server, Active Directory
Shadow_Copy
Version of Windows Server, released in 2016
periodically replicates snapshots, and the replication direction can be changed. Failover Clustering: Cluster operating system rolling upgrade, Storage Replicas
Windows_Server_2016
Network topology in which nodes are interconnected by network switches
unconnected. One of the advantages of such a setup is the capability of failover, meaning that in case one link breaks or a fabric goes out of order, datagrams
Switched_fabric
Physical computing device
support standard high availability models including clustering, automated failover, and redundant field-replaceable components. A few of the HSMs available
Hardware_security_module
Large and powerful computer
gameframe. Channel I/O Cloud computing Commodity computing Computer types Failover Gameframe History of IBM mainframe operating systems List of transistorized
Mainframe_computer
Computer networking protocol allowing first hop fallback on router failure
Router Protocol (ESRP) - Extreme Networks' proprietary standard with fast failover and layer 2 protection Gateway Load Balancing Protocol (GLBP) - a more
First-hop_redundancy_protocol
Isolation of malfunctioning computer resources
various decisions which can be customer specific plugins. Fault tolerance Failover "Alan Robertson Resource fencing using STONITH" (PDF). IBM Linux Research
Fencing_(computing)
Computer networking link aggregation technology
or 10-Gigabit Ethernet ports, with an additional one to eight inactive (failover) ports which become active as the other active ports fail. EtherChannel
EtherChannel
Electrical network switch which can use field-replaceable units
protocols and cable types. Blades can typically be configured in a parallel or failover configuration, which can allow for higher bandwidth, or redundancy in the
Modular_switch
With appropriately set-up Data Guard operations, DBAs can facilitate failovers or switchovers to alternative hosts in the same or alternative locations
Oracle_Data_Guard
Distributed computing paradigm
assigning minimum edge resources to each offloaded task. Management of failovers is crucial in order to keep a service alive. If a single node goes down
Edge_computing
International hardware and software company
designed to support Storage Bridge Bay specification that provide Auto-Failover capability to ensure that any interruption is handled without affecting
American_Megatrends
Form of mobile banking
SMPP, UCP etc.) Advanced SMS banking solutions also cater to providing failover mechanisms and least-cost routing options. Banks portal Mobile banking
SMS_banking
Cisco proprietary network virtualisation technology
protocol overhead, eliminates spanning tree loops, and provides sub-second failover, making it suitable for high-availability Layer 2 and Layer 3 networks
Virtual_Switching_System
Open-source enterprise resource planning suite
maintenance of data and data protection through data replication and complex failover capabilities in local and hosted environments. The system is based on a
Adaxa_Suite
Markup language for web content
variables, for example if a cookie is set or not; error handling, so that a failover can be used if an origin server is unavailable. The main alternatives to
Edge_Side_Includes
Manufacturer of fault-tolerant computers
storage devices, and redundant controllers to provide automatic high-speed "failover" in the case of a hardware or software failure. To contain the scope of
Tandem_Computers
Computer network protocol
and Issues in RFC 4960 (obsoleted by RFC 9260) RFC 7829 SCTP-PF: A Quick Failover Algorithm for the Stream Control Transmission Protocol RFC 7765 TCP and
Stream Control Transmission Protocol
Stream_Control_Transmission_Protocol
In software engineering, experimenting with the product to test extreme situations
platform include strengthening the backup, restore, network file transfer, failover capabilities and overall security of the environment. An evaluation to
Chaos_engineering
Power system monitoring software
ranging from historic graphing and graceful shutdowns to orchestrated power failover and virtual machine migration. Based on NUT design and protocol, the project
Network_UPS_Tools
Free and open-source proxy software
Retrieved 16 June 2025. "HAProxy as Forward Proxy". "Using HAProxy for MySQL failover and redundancy". Alexander Williams. 2009. Retrieved 19 February 2013.
HAProxy
Synchronization primitive for fault tolerance
and the transport that it runs on are as reliable as possible. Causing a failover because of a false alarm may, depending on the resource, be highly undesirable
Heartbeat_(computing)
Version of Windows Server, released in 2009
virtualization capabilities (Live Migration, Cluster Shared Volumes using Failover Clustering and Hyper-V), reduced power consumption, a new set of management
Windows_Server_2008_R2
Open-source web server software
in-band health checks Multiple load balancing mechanisms Fault tolerance and Failover with automatic recovery WebSocket, FastCGI, SCGI, AJP and uWSGI support
Apache_HTTP_Server
functionality Oracle supports third-party multipathing IO technologies (such as failover or load balancing to SAN access) the need for hot spares diminish ASM creates
Automatic_Storage_Management
Framework for remote procedure calls
object-oriented remote-object-invocation, replication, grid-computing, failover, load-balancing, firewall-traversals and publish-subscribe services. To
Internet Communications Engine
Internet_Communications_Engine
Redundancy switching systems provide T-1 and physical layer switchover and failover for equipment and circuit redundancy. Remote relay control integrates legacy
Dataprobe
Resilience of systems to component failures or errors
and switching to one of the remaining instances in case of a failure (failover); Diversity: Providing multiple different implementations of the same specification
Fault_tolerance
Internet protocol
endpoints and a peer, to reduce the probability of dropped connections after a failover event (RFC 6311). IKE is supported as part of the IPsec implementation
Internet_Key_Exchange
Interconnected network for delivering electricity to consumers
with wireless as a backup. Sufficient spare if "dark" capacity to ensure failover, often leased for revenue. Concerns with smart grid technology mostly focus
Electrical_grid
High-availability cluster software
of the cluster fail. Solaris Cluster provides two types of HA services: failover services and scalable services. To eliminate single points of failure,
Solaris_Cluster
Type of electrical grid
with wireless as a backup. Sufficient spare if "dark" capacity to ensure failover, often leased for revenue. Concerns with smart grid technology mostly focus
Smart_grid
Network switch
cards can be installed in a chassis to provide active/standby or stateful failover. The line cards provide port connectivity and service modules to allow
Cisco_Catalyst_6500
Software
Sysplex support for full participation in the Sysplex, enabling advanced failover support and a geographically dispersed environment that seamlessly acts
IBM WebSphere Application Server
IBM_WebSphere_Application_Server
European Wikipedia servers went offline due to an overheating problem. Failover to servers in Florida turned out to be broken, causing DNS resolution for
History_of_Wikipedia
I/O fail-over and load-balancing
I/O completion time, maximize throughput, and optimize resources Path failover and recovery — Utilizes redundant I/O channels to redirect application
Linux_DM_Multipath
Database using graph structures for queries
availability via datacenter-to-datacenter replication, auto-sharding, automatic failover, and other capabilities. Azure Cosmos DB 2017 Proprietary Not disclosed
Graph_database
Collection of computer servers
a commonplace event: large server farms provide redundancy, automatic failover, and rapid reconfiguration of the server cluster. The performance of the
Server_farm
doi:10.17487/RFC3620. RFC 3620. Retrieved 2014-05-27. INTERNET DRAFT, DHCP Failover Protocol (expired: September 2003) VeriSign Registry Registrar Protocol
List of TCP and UDP port numbers
List_of_TCP_and_UDP_port_numbers
protection" and reduced "failover time from five minutes to 30 seconds .. by 90% the number of users who lose connections during a failover." HP XP HPE 3PAR Nimble
HPE_Storage
Set of computers configured in a distributed computing system
approach "supercomputing". "High-availability clusters" (also known as failover clusters, or HA clusters) improve the availability of the cluster approach
Computer_cluster
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Hindu
Artless
Girl/Female
Arabic
Small; Minor
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Latin American Portuguese Spanish Italian
Light.
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Sikh
Happy
Girl/Female
Latin
From the oat field.
Boy/Male
Arabic, Muslim
Wish; Hope; Love
Boy/Male
British, English
From the Priest's Meadow
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Indian
Happiness
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Tamil
Satender | ஸாதேநà¯à®¤à®¾à®°
Lord Shiva, Husband of Sati
Boy/Male
American, British, English
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FAILOVER
FAILOVER
FAILOVER
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