Determining VVR network bandwidth usage and compression ratio

Use the vrstat command to determine the network bandwidth being used by VVR and the VVR compression ratio.

To view the network bandwidth currently being used by VVR and the VVR compression ratio

# vrstat -R local_rvgname

The argument local_rvgname is the name of the RVG on the local host and is optional. The local RVG name represents its RDS.

If you specify the local_rvgname name, the vrstat -R command displays the information about the RLINKs for the specified RVG. Otherwise, the command displays the information for all the RLINKs for all the RDSs.

Example:

To view the compression ratio and the network bandwidth used by the RDS hr_rvg between the Primary seattle and the Secondary london, issue the following command on any host in the RDS:

# vrstat -R hr_rvg

The output resembles:

Replicated Data Set hr_rvg:
Data Status:
london: DCM contains 1157888 Kbytes.
Network Statistics:
Messages              Errors                 Flow Control
--------              ------                 ------------
# Blocks RT(msec) Timeout Stream Memory Delays NW Bytes NW Delay 
Timeout
seattle - london
356     182272  6      1      0       0       280    271000  1 10
339     0       15     0      0       0       0      100000  1 20
Bandwidth Utilization 72908 Kbps.
Compression ratio 14.03
Bandwidth savings 92.87%

Note:

The Compression ratio and Bandwidth savings fields are only displayed if compression is enabled.