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Storage management

Terms related to data storage management, including definitions about enterprise storage and words and phrases about storage infrastructure, storage capacity and hierarchical storage management (HSM).

NVM - VAL

  • NVMe (non-volatile memory express) - NVMe (non-volatile memory express) is a host controller interface and storage protocol created to accelerate the transfer of data between enterprise and client systems and solid-state drives over a computer's high-speed PCIe bus.
  • NVMe over Fabrics (NVMe-oF) - NVMe over Fabrics (NVMe-oF) is a technology specification designed to enable nonvolatile memory express message-based commands to transfer data between a host computer and a target solid-state storage device or system over a network, such as Ethernet, Fibre Channel (FC) or InfiniBand.
  • NVMe over Fibre Channel (NVMe over FC) or FC-NVMe standard - Nonvolatile memory express over Fibre Channel (NVMe over FC) -- which is implemented through the Fibre Channel-NVMe (FC-NVMe) standard -- is a technology specification designed to enable NVMe-based message commands to transfer data and status information between a host computer and a target storage subsystem over a Fibre Channel network fabric.
  • NVRAM (non-volatile random-access memory) - NVRAM (non-volatile random-access memory) refers to computer memory that can hold data even when power to the memory chips has been turned off.
  • object storage - Object storage, also called object-based storage, is an approach to addressing and manipulating units of storage called objects, in which files and metadata are combined.
  • object storage device (OSD) - An object-based storage device or object storage device (OBSD or OSD) is a computer storage system that organizes data into containers called objects that a user or application determines are related.
  • online data backup (remote data backup) - Online data backup (remote data backup) is a method of off-site storage in which data is regularly backed up over a network on a remote server, typically hosted by a provider.
  • open source storage - Open source storage is data storage software developed in a public, collaborative manner that permits the free use, distribution and modification of the source code.
  • OpenStack Block Storage (Cinder) - OpenStack Block Storage (Cinder) is open source software designed to create and manage a service that provides persistent data storage to cloud computing applications.
  • OpenStack Swift - OpenStack Swift, also known as OpenStack Object Storage, is an open source object storage system that is licensed under the Apache 2.
  • OpenZFS - OpenZFS is an open-source file system and logical volume manager for highly scalable storage with built-in features such as replication, deduplication, compression, snapshots, and data protection.
  • operational costs - Definition - In information technology, operational costs document the price of running of IT services on a day-to-day basis.
  • OpLock (opportunistic lock) - OpLocks are made to enable simultaneous file access by multiple users while also improving performance for synchronized caches.
  • oversubscription - Oversubscription, in a SAN (storage area network) switching environment, is the practice of connecting multiple devices to the same switch port to optimize switch use.
  • paging - Paging is a method of writing data to, and reading it from, secondary storage for use in primary storage, also known as main memory.
  • parallel file system - A parallel file system is a software component designed to store data across multiple networked servers and to facilitate high-performance access through simultaneous, coordinated input/output operations (IOPS) between clients and storage nodes.
  • parallel I/O - Parallel I/O is a way of performing multiple input/output operations concurrently, rather than serially.
  • persistent storage - Persistent storage is any data storage device that retains data after power to that device is shut off.
  • phase-change cooling (vapor cooling) - Phase-change cooling, also called vapor cooling, is a microprocessor-cooling technology that works according to the same principles as a conventional refrigerator, freezer or air conditioner.
  • physical address - A physical address is a binary number in the form of logical high and low states on an address bus that corresponds to a particular cell of primary storage (also called main memory), or to a particular register in a memory-mapped I/O (input/output) device.
  • pipeline burst cache - A pipeline burst cache is a cache or storage area for a computer processor that is designed to be read from or written to in a pipelining succession of four data transfers (or bursts) in which later bursts can start to flow or transfer before the first burst has arrived at the processor.
  • pNFS (Parallel NFS) - The Parallel Network File System (pNFS) is part of the NFS v4.
  • point-in-time snapshot (PIT snapshot) - Point-in-time snapshots are a method of data protection that allows an administrator to make a full copy of a volume so that a restore can occur based on a specific time.
  • private cloud (internal cloud or corporate cloud) - Private cloud is a type of cloud computing that delivers similar advantages to public cloud, including scalability and self-service, but through a proprietary architecture.
  • private cloud storage (internal cloud storage) - Private cloud storage, also called internal cloud storage, is a service delivery model for storage within a large enterprise.
  • public cloud storage - Public cloud storage, also called storage-as-a-service or online storage is a service model that provides data storage on a pay-per-use basis, similar to the way a public utility like electric or gas provides and charges for services.
  • Pure Storage - Pure Storage is a provider of enterprise data flash storage solutions designed to substitute for electromechanical disk arrays.
  • Quiz: Data Storage - Computer storage is the holding of data in an electromagnetic form for access by a computer processor.
  • rack-scale flash - Rack-scale flash is flash-only storage that uses a high-speed interface to connect the storage more directly to the CPU than with a traditional storage array.
  • Rackspace Cloud - Cloud provider Rackspace offers several different cloud storage services including Cloud Files, Cloud Block Storage and Cloud Backup.
  • RADOS (Reliable Autonomic Distributed Object Store) - Reliable Autonomic Distributed Object Store (RADOS) is an object storage service with the ability to scale to thousands of hardware devices by making use of management software that runs on each of the individual nodes.
  • RADOS Block Device (RBD) - A RADOS Block Device (RBD) is software that facilitates the storage of block-based data in the open source Ceph distributed storage system.
  • RAID 0 (disk striping) - RAID 0 (disk striping) is the process of dividing a body of data into blocks and spreading the data blocks across multiple storage devices, such as hard disks or solid-state drives (SSDs), in a redundant array of independent disks (RAID) group.
  • RAID 10 (RAID 1+0) - RAID 10, also known as RAID 1+0, is a RAID configuration that combines disk mirroring and disk striping to protect data.
  • RAID 2 - RAID 2 is a technique that stripes data at the bit level using a Hamming code to detect errors.
  • RAID 3 (redundant array of independent disks) - RAID 3 is a RAID configuration that uses striping and parity, but it uses a parity disk to store the parity information generated by a RAID controller instead of striping it with the data.
  • RAID 4 (redundant array of independent disks) - RAID 4 is a RAID configuration that uses a dedicated parity disk and block-level striping across multiple disks.
  • RAID 5 - RAID 5 is a redundant array of independent disks configuration that uses disk striping with parity.
  • RAID 50 (RAID 5+0) - RAID 50, also known as RAID 5+0, combines distributed parity (RAID 5) with striping (RAID 0).
  • RAID 6 (redundant array of independent disks) - RAID 6, also known as double-parity RAID, uses two parity stripes on each disk.
  • RAID 7 (redundant array of independent disks) - RAID 7 is a trademarked RAID level owned by the now defunct Storage Computer Corp.
  • RAID controller - A RAID controller is a hardware device or software program used to manage hard disk drives (HDDs) or solid-state drives (SSDs) in a computer or storage array so they work as a logical unit.
  • RAID rebuild - A RAID rebuild is the data reconstruction process that occurs in a redundant array of independent disks (RAID) implementation when a hard disk drive fails.
  • raw device mapping (RDM) - Raw device mapping (RDM) is an option in the VMware server virtualization environment that enables a storage LUN to be directly connected to a virtual machine from the SAN.
  • read cache - A read cache is a computer storage component that temporarily keeps a copy of data from a slower permanent storage location in order to accelerate the fulfillment of future requests for the data.
  • redundancy - Redundancy is a system design in which a component is duplicated so if it fails there will be a backup.
  • remote replication - Remote replication is the process of copying production data to a device at a remote location for data protection or disaster recovery purposes.
  • removable media - Removable media is any type of storage device that can be removed from a computer while the system is running.
  • ROBO backup (remote data backup) - ROBO backup is the process of copying and archiving data created by remote and branch offices (ROBOs) and storing it securely.
  • Robson - Robson is a mass storage system similar to a hybrid hard drive (HHD).
  • SAN switch (storage area network switch) - A storage area network (SAN) switch is a device that connects servers and shared pools of storage devices and is dedicated to moving storage traffic.
  • SAN-in-a-box - A SAN-in-a-box, also known as a SAN-in-a-can or a SAN kit, is a data storage device that includes all the basic SAN components are in a single package.
  • SAN/NAS convergence - SAN/NAS convergence is the merging of network attached storage (NAS) with storage area network (SAN) technologies through the use of newer techniques that overcome incompatibilities between the two.
  • SATA controller - A SATA controller handles how hard drives are connected to a computer's motherboard.
  • SATA Express (SATAe) - SATA Express (SATAe or Serial ATA Express) is a bus interface to connect storage devices to a computer motherboard, supporting SATA and PCI Express protocols simultaneously.
  • Scale Computing - Scale Computing is a hyper-converged infrastructure vendor that ships the HC3, a scale-out storage system for virtual environments that uses Red Hat's KVM hypervisor.
  • SCSI Express (SCSIe) - SCSI Express (SCSIe) is an emerging industry standard for a storage interface that runs Small Computer System Interface (SCSI) commands over a PCI Express (PCIe)link.
  • Seebeck effect - The Seebeck effect describes the generation of electricity following the connection of two dissimilar electrical conductors or semiconductors that illustrates the thermoelectric effect.
  • server blade - A server blade is a thin, modular electronic circuit board containing one, two, or more microprocessors and memory, that is intended for a single, dedicated application (such as serving Web pages) and that can be easily inserted into a blade server, which is a space-saving rack with many similar servers.
  • shared storage - Shared storage is a medium accessible by all of the subscribers in a network, intended for file storage and allowing simultaneous access by multiple subscribers without the need to duplicate files to their computers.
  • shingled magnetic recording (SMR) - Shingled magnetic recording (SMR) is a technique for writing data to disk drives in partially overlapping tracks to boost areal density and overall capacity.
  • SimpliVity - SimpliVity Corp.
  • Single namespace - A single namespace is one presentation of file system data.
  • Skyera - Skyera was an all-flash array vendor that Western Digital's HGST subsidiary purchased in an all-cash transaction in December 2014.
  • smart paging - Smart paging is an advanced version of memory paging in Windows Server 2012 Hyper-V, where a virtual machine is capable of temporarily using hard disk space to supplement shortages of solid-state memory.
  • software RAID (software redundant array of independent disk) - Software RAID is a form of RAID (redundant array of independent disks) performed on the internal server.
  • software-defined storage (SDS) - Software-defined storage (SDS) is a computer program that manages data storage resources and functionality and has no dependencies on the underlying physical storage hardware.
  • source deduplication - Source deduplication is the removal of redundancies from data before transmission to the backup target.
  • spintronics - Spintronics is an emerging field of nanoscale electronics involving the detection and manipulation of electron spin.
  • SSD (solid-state drive) - An SSD (solid-state drive) is a type of nonvolatile storage media that stores persistent data on solid-state flash memory.
  • SSD caching - SSD caching, also known as flash caching, is the temporary storage of data on NAND flash memory chips in a solid-state drive so data requests can be met with improved speed.
  • Storage as a Service (SaaS) - Storage as a Service (SaaS) is a business model in which third-party providers rent space on their storage to end users that lack the capital budget and/or technical personnel to implement and maintain their own storage infrastructure.
  • storage capacity planning - The goal of storage capacity planning is to predict how much storage an organization will require so that just enough disk space can be purchased to meet the needs of users and applications.
  • storage container - A storage container is a defined, specific location in high-volume storage.
  • storage hypervisor - Storage hypervisors make more efficient use of storage resources in a virtual environment.
  • Storage Networking Industry Association - The Storage Networking Industry Association, also known as SNIA, is a nonprofit trade group that promotes standards and technologies for the storage industry and offers education services, technical work groups and certifications for IT professionals.
  • storage node - A storage node is typically a physical server with one or more hard-disk drives (HDDs) or solid-state drives (SDDs).
  • storage replication service - A storage replication service is a managed service in which stored or archived data is duplicated in real time over a storage area network (SAN).
  • storage stack - A storage stack, also called an integrated stack, is a bundled storage product that include servers, networking components and server virtualization software.
  • Storage vMotion - Storage vMotion is a component of VMware vSphere that allows the live migration of a running virtual machine's (VM) file system from one storage system to another, with no downtime for the VM or service disruption for end users.
  • streaming data architecture - A streaming data architecture is an information technology framework that puts the focus on processing data in motion and treats extract-transform-load (ETL) batch processing as just one more event in a continuous stream of events.
  • Tahoe-LAFS (Tahoe Least-Authority File System) - Tahoe-LAFS (Tahoe Least-Authority File System) is a distributed storage system that offers provider-independent security for local or cloud storage.
  • tape library - In data storage, a tape library is a collection of magnetic tape cartridges and tape drives.
  • tape shoe-shining or back-hitching - Tape shoe-shining (also known as tape back-hitching) refers to the back and forth motion a tape drive makes when the data stream to the drive is interrupted.
  • target deduplication - Target deduplication is the removal of redundancies from a backup transmission as it passes through an appliance sitting between the source and the backup target.
  • thin provisioning (TP) - Thin provisioning (TP) is a method of optimizing the efficiency with which the available space is utilized in storage area networks.
  • TIA-942 - TIA-942 is a standard developed by the Telecommunications Industry Association (TIA) to define guidelines for planning and building data centers, particularly with regard to cabling systems and network design.
  • Tier 1 storage - Tier 1 storage is a reference to the higher performing systems in a tiered storage environment.
  • TLC flash (triple-level cell flash) - TLC flash (triple-level cell flash) is a type of NAND flash memory that stores three bits of data per cell.
  • Top searches of 2008 - What were people searching the WhatIs.
  • Tower of Hanoi backups - Tower of Hanoi is a complex tape backup strategy that's useful for archiving data for an extended period of time in an economical manner by using a cycle of exponential retention periods instead of a large number of tapes.
  • U.K. Data Protection Act 1998 (DPA 1998) - The Data Protection Act 1998 (DPA 1998) is an act of the United Kingdom (UK) Parliament defining the ways in which information about living people may be legally used and handled.
  • unified storage (multiprotocol storage) - Unified storage -- sometimes called network unified storage or multiprotocol storage -- is a storage system that runs and manages files and applications from a single device.
  • United Kingdom Climate Change Act - The United Kingdom Climate Change Act is the world's first legally binding environmental sustainability framework.
  • utility storage - Utility storage is a service model in which a provider makes storage capacity available to an individual, an organization or a business unit on a pay-per-use basis.
  • value-based healthcare - Value-based healthcare, also known as value-based care, is a payment model that rewards healthcare providers for providing quality care to patients.

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