What is storage snapshot?

In computer systems, a snapshot is the state of a system at a particular point in time. The term was coined as an analogy to that in photography. It can refer to an actual copy of the state of a system or to a capability supplied by certain systems.

Conversely, even though deciding on a snapshot technology from a vendor, 1 have to meticulously consider the specifications and the atmosphere of the enterprise, which is about to deploy the technology. The primary aim of this post is to give an overview of the technologies and to discover the snapshot capabilities in the most effective way.

A copy-on-write snapshot utility creates a snapshot of alterations to stored information each and every time new information is entered or current information is updated. This makes it possible for fast recovery of data in case of a disk create error, corrupted file, or system malfunction. Even so, all preceding snapshots need to be obtainable if comprehensive archiving or recovery of all the data on a network or storage medium is needed.

A split-mirror snapshot utility references all the information on a set of mirrored drives. Every time the utility is run, a snapshot is created of the entire volume, not only of the new or updated information. This makes it possible to access information offline, and simplifies the procedure of recovering, duplicating, or archiving all the information on a drive. However, this is a slower procedure, and it requires far more storage space for each snapshot.