RPO Replication for TS7700 Disaster Recovery

Merle SadlerBy Merle Sadler

This blog is on the topic of the impact of zero Recovery Point Objective (RPO) for Mainframe Virtual Tape Replication focusing on the IBM TS7700 replication capability.

Have you ever thought about how much money you will need to save for retirement? I was talking with my financial advisor the other day and decided that whatever you think you need you should double. You can plan on having social security but if social security fails then retirement plans start to look not so rosy.

budget tradoffs for RTO and RPO

The same thing applies to computer systems. Customers spend a lot of time and money on Disk replication, reducing both RPO and RTO. But what if an application corrupts the data or a virus is uploaded? Corrupted or infected data is replicated just as easily as good data. This lends to making offline backup copies of disk files which also need to be replicated.

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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

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What’s Using Up All My Tapes? – Using Tape Management Catalog Data

BrettBy Dave Heggen

tape management catalog

Most of the data processed for IntelliMagic Vision for z/OS Tape is performance, event or activity driven, obtained from SMF and the Virtual Tape Hardware. Did you know that in addition to the SMF and TS7700 BVIR data, IntelliMagic Vision could also process information from a Tape Management Catalog (TMC)? Having this type of data available and processing it correctly is critical to answering the question “What’s using up all my tapes?”.

We’re all set up and distributed scratch lists. This is a necessary (and generally manual) part of maintaining a current tape library. It does require participation for compliance. Expiration Dates, Catalog and Cycle management also have their place to automate the expiration end of the tape volume cycle. This blog is intended to address issues that neither compliance nor automation address.

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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?

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Does your Disaster Recovery Plan meet its objectives? Analyzing TS7700 Tape Replication (Part 1 of 2)

BurtLoper

By Burt Loper

 

This blog is the first in a series of two blogs on the topic of Mainframe Virtual Tape Replication.

One of the challenges in IT is getting your data replicated to another location so that you have a recovery capability if your main operations center is compromised. IBM TS7700 Series Virtualization Engines support the copying of your tape data to other locations.

This article explores the various TS7700 replication modes.

TS7700 Terminology

The IBM TS7700 Virtualization Engine is commonly known as a cluster. When you connect two or more clusters together, that is called a grid or composite library. The information here applies to both the TS7740 model (which uses backend tape drives and cartridges to store tape data) as well as the TS7720 model (which uses a large disk cache to store tape data).

In a multi-cluster grid, the clusters are interconnected with each other via a set of 1 Gb or 10 Gb Ethernet links. The TS7700’s use TCP/IP communication protocols to communicate with each other and copy tape data from one cluster to another.

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