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Exploring IMS disaster recovery solutions, Part 2: IMS Base and IMS Tools recovery solutions

Glenn Galler (gallerg@us.ibm.com), Certified IT IMS Specialist, IBM

Glenn Galler is a certified IT specialist for the IMS product in the IBM Advanced Technical Skills (ATS) group. He is a senior programmer specializing in disaster recovery. He joined the ATS group in March 2007. Galler is also the campus recruiting manager for the IBM Software Group for the University of Michigan, holding this position since 1998. He joined IBM in 1982 receiving his bachelor's degree in computer science from the University of Michigan. In 1989, he received a master's degree in computer engineering from the University of Santa Clara. Galler has worked in many areas of IMS, including testing, development, marketing and management. From 1992 to 1997, he held an international assignment in England as the European program manager for the IMS Quality Partnership Program (QPP).

Ron Bisceglia (RBisceglia@rocketsoftware.com), Lead Software Developer, Rocket Software

Ron Bisceglia is a lead software developer for Rocket Software, based in Houston. He has worked with IMS for more than 24 years, and for the past 20 years has been involved in the design, development, and support of a range of IMS tools. He has been involved in the development of database reorganization utilities, data propagation tools, database monitoring and analysis solutions, data replication, and backup and recovery products.

Summary: Every customer needs a Disaster Recovery (DR) plan. The strategies used differ from one customer to another and they differ in time to recovery and loss of data. For IMS®, there are five types of DR solutions: restart, recovery, recovery and restart, coordinated IMS and DB2® restart, and coordinated IMS and DB2 disaster recovery and restart. Here in Part 2, we explore the recovery solutions that use only the IMS base functions and some of the functions in the IMS Tools.

View more content in this series

Date: 12 Apr 2012
Level: Intermediate
PDF: A4 and Letter (1007 KB | 17 pages)Get Adobe® Reader®

Activity: 15561 views
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Before you start

About this series

This "Exploring IMS Disaster Recovery Solutions" series covers non-storage mirroring disaster recovery solutions for the IMS environment. Methods described show how various backup and recovery resources can be combined to reduce time and data loss in the event of a disaster. Storage-based fast replication techniques (like FlashCopy technology) are also shown here with storage-aware IMS Tools that allow a coordinated and consistent recovery point between IMS and DB2 databases.

About this tutorial

Part 3 describes the IMS Disaster Recovery (DR) solutions that require backup resources like image copies, change-accumulation data sets and, in some cases, the archived log data sets.

The IMS Base and one IMS Tools Disaster Recovery solutions discussed in this tutorial:

Timestamp Recovery to Image Copies Only (TSR to IC)
Timestamp Recovery Using Change Accums (TSR to CA)
Full Database Recovery to Last Good Archived Log (Full DB Recovery)
Timestamp Recovery Using Incremental Image Copies Only (TSR to IIC)

This tutorial is the second in a series of four to show you how to use two forms of recovery: timestamp recovery (TSR) for a specific recovery point (RP) and full database recovery to the end of the last good archived log data set sent to the remote site. In the fourth solution, the tools in the IMS Recovery Solution Pack are used to create an incremental image copy (IIC) offline by applying log updates to an existing image copy up through an RP, resulting in a disaster recovery scheme that employs only clean image copies. Each solution in this tutorial requires a certain amount of RECON conditioning.

If you haven't done so, consider downloading the IMS Disaster Recovery Demonstrations, which go hand in hand with this series.

Objectives

After completing the tutorial, you should be able to: