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Business Continuance Volume
In disk arrays, a business continuance volume (BCV) is EMC Corporation's term for an independently addressable copy of a data volume, that uses advanced mirroring technique for business continuity purposes. Use BCVs can be detached from the active data storage at a point in time and mounted on non-critical servers to facilitate offline backup or parallel computing. Once offline processes are completed, these BCVs can be either: * discarded * used as a source to recover the production data * re-attached (re-synchronized) to the production data again Types There are two types of BCVs: * A clone BCV is a traditional method, and uses one-to-one separate physical storage (splitable disk mirror) ** least impact on production performance ** high cost of the additional storage ** persistent usage * A snapshot BCV, that uses copy on write Copy may refer to: *Copying or the product of copying (including the plural "copies"); the duplication of information or an artifact **Cut, co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Disk Array
A disk array is a disk storage system which contains multiple disk drives. It is differentiated from a disk enclosure, in that an array has cache (computing), cache memory and advanced functionality, like redundant array of independent disks, RAID, Data deduplication, deduplication, encryption and Storage virtualization, virtualization. Components of a disk array include: * Disk array controllers * Cache (computing), Cache in form of both volatile random-access memory and Non-volatile memory, non-volatile flash memory. * Disk enclosures for both Magnetic storage, magnetic rotational hard disk drives and electronic solid-state drives. * Power supply, Power supplies Typically a disk array provides increased availability, resiliency, and maintainability by using additional redundant components (controllers, power supplies, fans, etc.), often up to the point where all single point of failure, single points of failure (SPOFs) are eliminated from the design. Additionally, disk array com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EMC Corporation
EMC Corporation (stylized as EMC²) was an American multinational corporation headquartered in Hopkinton, Massachusetts, which sold data storage device, data storage, information security, virtualization, analytics, cloud computing and other products and services that enabled organizations to store, manage, protect, and analyze data. EMC's target markets included large companies and small- and medium-sized businesses across various vertical markets. The company's stock (as EMC Corporation) was added to the New York Stock Exchange on April 6, 1986, and was also listed on the S&P 500 index. EMC acquired Iomega in 2008, and a 2013 partnership with Lenovo resulted in the rebranding of Iomega as LenovoEMC. EMC merged with the computer systems manufacturer Dell, Dell Inc. in 2016 to form Dell Technologies. This merger led to the joint venture with Lenovo dissolving; at that time, ''Forbes'' noted EMC's "focus on developing and selling data storage and data management hardware and soft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Business Continuity
Business continuity may be defined as "the capability of an organization to continue the delivery of products or services at pre-defined acceptable levels following a disruptive incident", and business continuity planning (or business continuity and resiliency planning) is the process of creating systems of prevention and recovery to deal with potential threats to a company. In addition to prevention, the goal is to enable ongoing operations before and during execution of disaster recovery. Business continuity is the intended outcome of proper execution of both business continuity planning and disaster recovery. Several business continuity standards have been published by various standards bodies to assist in checklisting ongoing planning tasks. Business continuity requires a top-down approach to identify an organisation's minimum requirements to ensure its viability as an entity. An organization's resistance to failure is "the ability ... to withstand changes in its environmen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Backup
In information technology, a backup, or data backup is a copy of computer data taken and stored elsewhere so that it may be used to restore the original after a data loss event. The verb form, referring to the process of doing so, is "wikt:back up, back up", whereas the noun and adjective form is "wikt:backup, backup". Backups can be used to data recovery, recover data after its loss from File deletion, data deletion or Data corruption, corruption, or to recover data from an earlier time. Backups provide a simple form of IT disaster recovery; however not all backup systems are able to reconstitute a computer system or other complex configuration such as a computer cluster, active directory server, or database server. A backup system contains at least one copy of all data considered worth saving. The computer data storage, data storage requirements can be large. An information repository model may be used to provide structure to this storage. There are different types of data stor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parallel Computing
Parallel computing is a type of computing, computation in which many calculations or Process (computing), processes are carried out simultaneously. Large problems can often be divided into smaller ones, which can then be solved at the same time. There are several different forms of parallel computing: Bit-level parallelism, bit-level, Instruction-level parallelism, instruction-level, Data parallelism, data, and task parallelism. Parallelism has long been employed in high-performance computing, but has gained broader interest due to the physical constraints preventing frequency scaling.S.V. Adve ''et al.'' (November 2008)"Parallel Computing Research at Illinois: The UPCRC Agenda" (PDF). Parallel@Illinois, University of Illinois at Urbana-Champaign. "The main techniques for these performance benefits—increased clock frequency and smarter but increasingly complex architectures—are now hitting the so-called power wall. The computer industry has accepted that future performance inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data
Data ( , ) are a collection of discrete or continuous values that convey information, describing the quantity, quality, fact, statistics, other basic units of meaning, or simply sequences of symbols that may be further interpreted formally. A datum is an individual value in a collection of data. Data are usually organized into structures such as tables that provide additional context and meaning, and may themselves be used as data in larger structures. Data may be used as variables in a computational process. Data may represent abstract ideas or concrete measurements. Data are commonly used in scientific research, economics, and virtually every other form of human organizational activity. Examples of data sets include price indices (such as the consumer price index), unemployment rates, literacy rates, and census data. In this context, data represent the raw facts and figures from which useful information can be extracted. Data are collected using technique ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Disk Mirror
In data storage, disk mirroring is the replication of logical disk volumes onto separate physical hard disks in real time to ensure continuous availability. It is most commonly used in RAID 1. A mirrored volume is a complete logical representation of separate volume copies. In a disaster recovery context, mirroring data over long distance is referred to as storage replication. Depending on the technologies used, replication can be performed synchronously, asynchronously, semi-synchronously, or point-in-time. Replication is enabled via microcode on the disk array controller or via server software. It is typically a proprietary solution, not compatible between various data storage device vendors. Mirroring is typically only synchronous. Synchronous writing typically achieves a recovery point objective (RPO) of zero lost data. Asynchronous replication can achieve an RPO of just a few seconds while the remaining methodologies provide an RPO of a few minutes to perhaps several hou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snapshot (computer Storage)
In Computer, computer systems, a snapshot is the State (computer science), state of a system at a particular point in time. The term was coined as an analogy to that in Snapshot (photography), photography. Rationale A full backup of a large data set may take a long time to complete. On Computer multitasking, multi-tasking or multi-user systems, there may be writes to that data while it is being backed up. This prevents the backup from being Atomicity (database systems), atomic and introduces a version skew that may result in data corruption. For example, if a user moves a file into a directory that has already been backed up, then that file would be completely missing on the Computer data storage, backup media, since the backup operation had already taken place before the addition of the file. Version skew may also cause corruption with files which change their size or contents underfoot while being read. One Backup#Approaches to backing up live data, approach to safely backin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copy On Write
Copy may refer to: *Copying or the product of copying (including the plural "copies"); the duplication of information or an artifact **Cut, copy and paste, a method of reproducing text or other data in computing ** File copying **Photocopying, a process which makes paper copies of documents and other visual images ** Fax, a telecommunications technology used to transfer facsimile copies of documents, especially over the telephone network **Facsimile, a copy or reproduction that is as true to the original source as possible **Replica, a copy closely resembling the original concerning its shape and appearance **Term of art in U.S. copyright law meaning a material object in which a work of authorship has been embodied, such as a book * Copy (command), a shell command on DOS and Windows systems * Copy (publishing), written content in publications, in contrast to photographs or other elements of layout. **The output of journalists and authors, ready for copy editing and typesetting * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operational Continuity
Operational continuity refers to the ability of a system to continue working despite damages, losses, or critical events. In the Human Resources and Organizational domain, including IT, it implies the need to determine the level of resilience of the system, its ability to recover after an event, and build a system that resists to external and internal events or is able to recover after an event without losing its external performance management capability. Organizational Continuity is achieved only with specific corporate planning. In the material domain, it determines the need to adopt redundant systems, performance monitoring systems, and can even imply the practice to cannibalize or to remove serviceable assemblies, sub-assemblies or components from a repairable or serviceable item of equipment to install them on another, in order to keep the external system performance active.North Atlantic Treaty Organization, NATO Standardization Agency AAP-6 – Glossary of terms and definiti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Business Continuity Institute
The Business Continuity Institute (BCI) was established in 1994 by Andrew Hiles and others, evolving from the Survive Group - a network of disaster recovery and business continuity experts. The Institute's initial vision was to enable individual members to obtain guidance and support from fellow business continuity practitioners. History The BCI's first AGM was held in 1995 in London, becoming an independent organisation in May 1997. It was initially led by John Marsh and then John Sharp. In 2004 the BCI expanded, moving to office space in Caversham, Berkshire under the leadership of new Executive Director, Lorraine Darke. Lorraine continued in this role until September 2016, when she stepped down - being replaced by David Thorp, the current BCI Executive Director. Currently, the BCI is based in Reading, UK, and has over 9,000 members in more than 120 countries. More details of the development of the BCI are available in a timeline listing on the Institute's website. See also * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Backup Software
In information technology, a backup, or data backup is a copy of computer data taken and stored elsewhere so that it may be used to restore the original after a data loss event. The verb form, referring to the process of doing so, is " back up", whereas the noun and adjective form is " backup". Backups can be used to recover data after its loss from data deletion or corruption, or to recover data from an earlier time. Backups provide a simple form of IT disaster recovery; however not all backup systems are able to reconstitute a computer system or other complex configuration such as a computer cluster, active directory server, or database server. A backup system contains at least one copy of all data considered worth saving. The data storage requirements can be large. An information repository model may be used to provide structure to this storage. There are different types of data storage devices used for copying backups of data that is already in secondary storage on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
