IT25287: PERFORMANCE SLOWDOWN SEEN DURING REPLICATION DUE TO LOCKING OF OBJECTS AFTER UPGRADE TO V8.1.4

APAR status

• Closed as unreproducible.

Error description

• In V8.1.4, there was a change made for replication tiering so
  that an object would be locked to prevent it from being moved to
   a tiered cloud container pool. This can cause excessive locking
   and a potential slowdown in replication.
  The main symptom is seen in the show files created with
  servermon or the "show locks" command and thousands of locks of
  type 20009 being seen in the output. Show files produced with
  servermon because of this issue can be large, sometimes
  exceeding 1GB in size.
  .
  Tivoli Storage Manager Versions Affected: Spectrum Protect
  version 8.1.4, 8.1.5
  .
  
  
  
  
  
  | MDVREGR 8.1.4.0-TIV_5698ISMSV |
  .
  Customer/L2 Diagnostics:
  .
  Initial Impact: Medium
  .
  Additional Keywords: TS000845741 slow replication performance
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All IBM Spectrum Protect server users.                       *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See error description.                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * This problem was fixed in level 8.1.5.                       *
  * Affected platforms for reported release: AIX, Linux, and     *
  * Windows.                                                     *
  ****************************************************************
  

Problem conclusion

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

Applicable component levels