• USA : +1 973 910 5725
  • INDIA: +91 905 291 3388
  • info@tekslate.com
  • Login

MQ Series Logging and Recovery

All operations that affect the “state” of the Queue Manager and its objects are logged to a log file.

What is “state”?

  • Object definitions (queue manager, queues, processes, channels, etc)
  • Queue content (messages)

Message channel states are logged separately by each channel.  There are two forms of Logging

Circular – log records are written sequentially across several files, then “wrap” back to the first file.

log records are written sequentially across files. New files are allocated as current files fill. No automatic reuse of file space!

Problem:  Length (in time)  of longest running transaction vs amount of writes to log determines  size of log needed.

Tips

Circular logging is easy to manage, but is fatal if log is damaged (hard to backup circular logs!).

Linear logging is hard to maintain but provides for archiving of previous logs (still a problem if “current” log is damaged).

Summary
Review Date
Reviewed Item
MQ Series Logging and Recovery
Author Rating
5

“At TekSlate, we are trying to create high quality tutorials and articles, if you think any information is incorrect or want to add anything to the article, please feel free to get in touch with us at info@tekslate.com, we will update the article in 24 hours.”

0 Responses on MQ Series Logging and Recovery"

Leave a Message

Your email address will not be published. Required fields are marked *

Site Disclaimer, Copyright © 2016 - All Rights Reserved.