CM22 IMS Physical Organization of Databases Unit 13 Part 1 (Database Recovery)

This unit covers the IMS Database Recovery utilities. Topics include:

• Database recovery concept

• Data sets, JCL, and considerations for the Database Recovery utilities

• Sequence of events and sequence of utilities.

• Effects of missing input data sets

• Impact of supplying incorrect recovery specifications

• A brief overview of DBRC

After completing this unit, you should be able to

•Describe the steps, the utilities, and the frequency considerations required to plan the recovery of an IMS batch application

•Differentiate between full recovery and backout

•Identify the functions and characteristics of a specific database recovery

•Identify the effects of missing logs, redundant logs, and wrong purge date specifications

•List the steps required to recover a database that has become unusable due to a hardware or software error

Student Notes : https://ibm.box.com/s/z7yf7vrj1t7lyfeg4q1fj4psf428azv3

0:01:30 Recovery 

0:08:41 Logging environment  

0:59:19 IMS System Log Data Set 

1:01:53 Logged events  

1:02:19 Single or Dual logging in batch  

1:05:24 System Log Recovery utility  

1:09:50 Backup/Recovery utilities  

1:23:53 IMS database recovery concept  

1:27:45 Partial DB recovery: Incomplete log input  

1:31:10 Database Recovery using DB Backout (IMS Batch Backout utility) 

1:33:48 Database Batch Image Copy  

1:39:54 Database Concurrent Image Copy 

1:44:09 Image Copy considerations