IJ51363: DIRECTORY SCAN PERFORMANCE ISSUE IN 5.1.3 AND LATER

APAR status

• Closed as program error.

Error description

• The performance of scanning a directory is degraded since
  5.1.3 release.
  

Local fix

• Update to a fixed release: Storage Scale 5.1.9.5, 5.2.1.0
  or later.
  

Problem summary

• Scanning directory with policy or Scale gpfs_ireaddir64 API is
  degraded since 5.1.3 release.
  

Problem conclusion

• This problem is fixed in 5.1.9.5
  To see all Spectrum Scale APARs and their respective
  Fix solutions refer to page: 
  https://public.dhe.ibm.com/storage/spectrumscale/spectrum_scale
  _apars.html
  
  Benefits of the solution:
  Fix the to avoid performance degradation on scanning directory
  with policy or Scale gpfs_ireaddir64 API.
  
  Work Around:
  None
  
  Problem trigger:
  Run policy job or use Scale gpfs_ireaddir64 API to scan
  directory in Scale file system
  
  Symptom:
  Performance impact
  
  Platforms affected:
  All Operating Systems
  
  Functional Area affected:
  policy or gpfs_ireaddir64 API
  
  Customer Impact:
  High Importance
  

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

• Fixed component name

  SPEC SCALE STD

• Fixed component ID

  5737F33AP

Applicable component levels