About VVR compression

The compression feature enables VVR to send data over the network in a compressed format from a Primary to one or more Secondary hosts. It reduces network bandwidth consumption by VVR. This feature is particularly useful in scenarios where there is low available bandwidth or where the bandwidth is shared among several applications. Purchasing an external compression software or hardware for data transfer can prove costly. Hence, compression feature in VVR is a cost-effective alternative in such scenarios.

VVR uses the zlib library for performing compression and decompression. For more information on the zlib compression library, see http://www.zlib.net


The compression option can be enabled on a per system or per Secondary basis using the CLI. If compression is enabled, the Primary will generate the compressed data during the sending of any update. At any time, the user can disable or enable the compression feature without stopping replication. Compression is disabled by default on each system and in the VVR engine, for new VVR configurations as well as older VVR configurations upgraded from previous releases. The feature is enabled only when all hosts are running 6.0 or higher and the disk group version is 170 or above.