How to Measure the Impact of a Zero RPO Strategy

Merle SadlerBy Merle Sadler

Have you ever wondered about the impact of zero RPO on Mainframe Virtual Tape for business continuity or disaster recovery? This blog focuses on the impact of jobs using the Oracle/STK VSM Enhanced Synchronous Replication capability while delivering an RPO of 0.

A recovery point objective, or “RPO”, is defined by business continuity planning. It is the maximum targeted time period in which data might be lost from an IT service due to a major incident.

Zero RPO - Recovery Point Objective

Continue reading

Break Open Your VSM Black Box and Expose Internal Tape Processing

J._Ticic-web0By John Ticic

 

When virtual tape systems run properly, it’s great. But when there are problems, or you need to examine detailed tape information, the virtualization makes it hard to see what is really going on inside the black box.

Luckily, with z/OS we have SMF, and the virtual tape hardware vendors can define a custom record to provide measurements on the internals that can help see what is happening inside. Oracle STK VSM, for instance, generates detailed SMF data in a user record that allows us to examine tape processing in fine detail using the intelligent post-processing from the enhanced Oracle Tape support in IntelliMagic Vision.

Some of the questions that you may want answered are:

    • Why are the tape mounts taking so long?
    • How many virtual tape mounts need to be staged from real tapes?
    • Are my virtual tapes being replicated in a timely fashion?

Continue reading