IC74210: PERFORMANCE PROBLEM WITH MULTI-SESSION BACKUPS WITH CRC ENABLED

IBM Tivoli Storage Manager V5.5 Fix Pack 6 (5.5.6) Server Downloads

APAR status

• Closed as program error.

Error description

• If mulitple sessions are used by a node that has
  VALIDATEPROTOCOL=YES the backup performance is degraded to the
  speed of a single session.
  Tivoli Storage Manager Versions Affected: All supported versions
  Customer/L2 Diagnostics :
  CRC-enabled multi-session backups complete in the same amount of
  time as a single session backup.  According to the 'show
  threads' output ,the backup session threads (and sometimes other
  backup session threads) compete over mutex SMV->mutex.
  Initial Impact: Medium
  Additional Keywords: "multiple sessions" CRC slow
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All Tivoli Storage Manager server users      *
  *                 with multiple client sessions with CRC       *
  *                 enabled.                                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: See ERROR DESCRIPTION.                  *
  ****************************************************************
  * RECOMMENDATION: Apply fixing level when available. This      *
  *                 problem is currently projected to be fixed   *
  *                 in levels 5.5.6, and 6.2.3. Note       *
  *                 that this is subject to change at the        *
  *                 discretion of IBM.                           *
  ****************************************************************
  *
  

Problem conclusion

• This problem was fixed.
  Affected platforms: AIX, HP-UX, Sun Solaris, Linux, z/OS
  and Windows
  

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:

  PM33586

Fix information

• Fixed component name

  TSM SERVER

• Fixed component ID

  5698ISMSV

Applicable component levels

• R55A PSY

     UP

• R55H PSY

     UP

• R55L PSY

     UP

• R55S PSY

     UP

• R55W PSY

     UP

• R61A PSY

     UP

• R61H PSY

     UP

• R61L PSY

     UP

• R61S PSY

     UP

• R61W PSY

     UP

• R62A PSY

     UP

• R62H PSY

     UP

• R62L PSY

     UP

• R62S PSY

     UP

• R62W PSY

     UP