HP 3PAR Remote Copy Software - Manual (Page 331)

InForm OS Version 2.3.1 Remote Copy User’s Guide
D.1
Comparing MTU Speeds
D
Comparing MTU Speeds
Depending on workload, you might see as much as a 50 percent increase by using a 9000 byte
MTU setting as opposed to a 1500 byte MTU setting. To see the difference in throughput
between the 1500 and the 9000 byte MTU settings for a specific system, you can configure a
test volume group and measure the initial volume synchronization throughput using the
statport -rcip command as follows:
1 Set the MTU to the default (1500 bytes) for each port on both the primary and backup
storage servers.
where is the port location given in Node:Slot:Port format.
2 On the primary storage server, configure a test volume group with a single volume of 20GB.
a Create a test CPG on the primary and one on the backup:
where is the name of the CPG to be created.
# controlport rcip mtu 1500
On InServ1:
# createcpg
On InServ2:
# createcpg