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Copy-on-write (COW), also called implicit sharing [1] or shadowing, [2] is a resource-management technique [3] used in programming to manage shared data efficiently. Instead of copying data right away when multiple programs use it, the same data is shared between programs until one tries to modify it.
A:\Temp\File.txt This path points to a file with the name File.txt, located in the directory Temp, which in turn is located in the root directory of the drive A:. C:..\File.txt This path refers to a file called File.txt located in the parent directory of the current directory on drive C:. Folder\SubFolder\File.txt
It is unethical for a program to store its proprietary data here. (There are other folders dedicated to program data.) [username]\AppData (hidden) This folder stores per-user application data and settings. The folder contains three subfolders: Roaming, Local, and LocalLow. Roaming is for networked based logins for roaming profiles.
Single instance storage, found in Windows Server 2000 through Windows Storage Server 2008, allows identical files to be merged to one file and create references to that merged file. SIS consists of a file system filter that manages copies, modification and merges to files; and a user space service (or groveler ) that searches for files that are ...
Storage resource manager is a storage resource management (SRM) tool by the Scientific Data Management Group at Lawrence Berkeley National Laboratory (LBNL). This group is part of the Computational Research Division at LBNL and focuses on developing technologies for efficient data access, storage, analysis, and the management of massive ...
A program that is configured to use a library can use either static-linking or dynamic-linking.Historically, libraries could only be static. [4] For static-linking (), the library is effectively embedded into the programs executable file, while for dynamic-linking the library can be loaded at runtime from a shared location, such as system files.
Hierarchical storage management (HSM), also known as tiered storage, [1] is a data storage and data management technique that automatically moves data between high-cost and low-cost storage media. HSM systems exist because high-speed storage devices, such as solid-state drive arrays, are more expensive (per byte stored) than slower devices ...
FlashCopy is an IBM feature supported on various IBM storage devices that made it possible to create, nearly instantaneously, point-in-time snapshot copies of entire logical volumes or data sets. [1] The Hitachi Data Systems implementation providing similar function was branded as ShadowImage. Using either implementation, the copies are ...