Monday, July 25, 2022

Isilon replication performance issue II

We have no issue with replication on those 2 big shares for about half a yr.  Replication is setup to run every 4 hours.  They normally complete within 20 min.  Suddenly one day, I receive email alert on the target Isilon.

"PDM degraded, too many operations alert"  

It will take longer and longer for the incremental replication to complete for the share with lots of files and deep folder structure.  Other shares are not affected.  Open a support ticket and confirm it is affected by bug 132337.   Support provided the workaround to the issue.  After applying the workaround, replication is back to normal.  

Final fix should be on OneFS 9.2.1.13 / 9.1.0.20.  

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