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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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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