A snapshot is a point-in-time copy of a volume’s data. The XIV snapshot uses several innovative technologies to ensure minimal impact on system performance. Snapshots are space-efficient, make use of pointers, and only contain partitions with data that has changed from the original volume. If a partition has not changed, both the snapshot and the volume point to the same partition. They efficiently share cache for common data, effectively working as a larger cache than would be the case with full data copies.
A volume copy is an exact ...

Get IBM XIV Storage System Copy Services and Migration now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.