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SnapMirror is designed to be part of a Disaster recovery plan: it stores an exact copy of data on time when snapshot was created on the disaster recovery site and could keep the same snapshots on both systems. SnapVault, on the other hand, is designed to store less snapshots on the source storage system and more Snapshots on a secondary site ...
In Windows Server 2003, VSS is used to create incremental periodic snapshots of data of changed files over time. A maximum of 64 snapshots are stored on the server and are accessible to clients over the network. This feature is known as Shadow Copies for Shared Folders and is designed for a client–server model. [12]
In May, 2017, Dell EMC announced ScaleIO.Next, featuring inline compression, thin provisioning and flash-based snapshots. The new release features enhanced snapshot tools and features and full support for VMware Virtual Volumes (VVols), as well as volume migration for deployments that want to take advantage of lower cost media for low-priority ...
This may include a snapshot of the data files plus a snapshotted log of changes made while the backup is running. Upon a restore, the changes in the log files are applied to bring the copy of the database up to the point in time at which the initial backup ended. [56]
IT disaster recovery (also, simply disaster recovery (DR)) is the process of maintaining or reestablishing vital infrastructure and systems following a natural or human-induced disaster, such as a storm or battle. DR employs policies, tools, and procedures with a focus on IT systems supporting critical business functions. [1]
To avoid downtime, high-availability systems may instead perform the backup on a snapshot—a read-only copy of the data set frozen at a point in time—and allow applications to continue writing to their data. Most snapshot implementations are efficient and can create snapshots in O(1). In other words, the time and I/O needed to create the ...
Without clustering, if a server running a particular application crashes, the application will be unavailable until the crashed server is fixed. HA clustering remedies this situation by detecting hardware/software faults, and immediately restarting the application on another system without requiring administrative intervention, a process known ...
Disaster recovery may refer to: Recovery stage of emergency management; IT disaster recovery, maintaining or reestablishing vital information technology infrastructure;