Response Time

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

If the CPU is constrained, CA Vtape will run slower just like the other software and jobs executing on the LPAR. Jobs attempting to mount Virtual Volumes will experience elongated mount and run-times. Increasing the available MIPS or moving workloads that do not use CA Vtape to other LPARs or installing a zIIP engine can help in this situation.

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

Utilizing OSA cards.
Adding additional memory or DASD storage for the DASD appliance.
Providing additional DASD appliances through additional mount points.