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MQ Series Logging and Recovery

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Tekslate

Published Date

23rd October, 2018

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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). Check out our Popular Articles

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TekSlate

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TekSlate is the best online training provider in delivering world-class IT skills to individuals and corporates from all parts of the globe. We are proven experts in accumulating every need of an IT skills upgrade aspirant and have delivered excellent services. We aim to bring you all the essentials to learn and master new technologies in the market with our articles, blogs, and videos. Build your career success with us, enhancing most in-demand skills .

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