Understanding Performance › Response Time

Response Time

The CA Vtape response time is directly related to available MIPS, Linux, and the DASD response times.

If the CPU is constrained, CA Vtape runs slower like the other software and jobs executing on the LPAR. Jobs attempting to mount Virtual Volumes experience elongated mount and run-times. You can help in this situation by:

• Increase the available MIPS.
• Move workloads that do not use CA Vtape to other LPARs.
• Install a zIIP engine.

If the DASD used for CA Vtape has slow response times, then jobs attempting to read and write Virtual Volumes experience elongated run-times. You can address slow DASD response times in a number of ways. The following are some of the most effective ways:

• Use OSA cards.
• Add memory or DASD storage for the DASD appliance.
• Provide DASD appliances through extra mount points.