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File locking in IBM MQ 9.3 multi-instance queue managers

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Abstract

The objective of this document is to analyze the file locking activity in an IBM MQ 9.3
multi-instance queue manager in Linux for the following files of the queue manager which
help to coordinate when the Standby instance can become Active:
active
master
standby

Content


There are only two scenarios that are traced:
- The startup trace is captured for both the Active and the Standby instance, and
- The graceful switchover from the Active to the Standby.

This document does not cover the trace of "failure" scenarios.
.
The queue manager in question is the only one active in both hosts for this scenario, in that way, there is no "contamination" in the traces from other queue managers.
The file system is NFS Version 4.
.
.
+ See attached PDF File: 
++ Related articles
https://www.ibm.com/support/pages/node/7112337
Using lslocks or lsof to list locked files when using IBM MQ multi-instance queue managers in Linux
https://www.ibm.com/support/pages/node/6348636
MQ Distributed: collection of articles regarding multi-instance queue managers
 
+ tags:
Author: Angel Rivera;
+++ end +++ 

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Document Information

Modified date:
01 March 2024

UID

swg27049989

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