Parallel Copy

Overview

Auxiliary Copy allows you to define a storage policy copy to be configured with a parallel copy, which specifies that after reading the source copy (only once) data can be written to multiple secondary copies concurrently rather than sequentially. This optimizes use of media, thereby decreasing the time needed to run auxiliary copy operations.

How Parallel Copy Works?

When enabled, the data is read from the source copy (only once) and written to different copies. Therefore, multiple copies are written in parallel by reading the source media only once.

For step-by-step instructions on enabling this feature, see Enable a Parallel Copy.

Can Be Used For...

Parallel copy can be used in an environment where you have multiple copies using identical network speed.

Cannot Be Used For...

Parallel copy cannot be used in an environment where one copy is configured on a high speed network and the other copy is configured on a low speed network. In this scenario, the throughput of the copy configured on the low speed network will be the throughput of the auxiliary copy.

For example, parallel copy operation is not advisable in an environment:

Where you have one copy configured on WAN and other copy on LAN.
In case of tape, one copy using LTO5 tape and drives and other copy using LTO4 tape and drives.

Special Considerations

When you configure the parallel copy, resources are held until operations are complete. Therefore, do not enable this feature unless the jobs being copied are the same.