IJ52205: MMAPPLYPOLICY NEEDS TO ADJUST THE DEFAULT VALUE OF -A TO FALL WITHIN THE OPEN FILE SOFTLIMIT (ULIMIT -N)

APAR status

• Closed as program error.

Error description

• mmapplypolicy performs an inode scan in parallel and the number
  of iscanBuckets can be specified via -A option. If the -A option
  is not specified, tsapolicy calculates it based on total used
  inodes between 7 to 4096. In a large file system, the value
  calculated  is often larger than the open file limit, and
  tsapolicy could fail with "'Too many open files".
  

Local fix

Problem summary

• mmapplypolicy performs an inode scan in parallel and the number
  of iscanBuckets can be specified via -A option. If the -A option
  is not specified, tsapolicy calculates it based on total used
  inodes between 7 to 4096. In a large file system, the value
  calculated  is often larger than the open file limit, and
  tsapolicy could fail with "'Too many open files".
  

Problem conclusion

• This problem is fixed in 5.1.9.6
  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:
  mmapplypolicy will not fail in a large file system when a
  default value is calculated based on the open file limit.
  
  Work around:
  none
  
  Problem trigger:
  This problem could occur if total used inodes is larger than
  (open file limit>-100) millions.
  
  Symptom:
  Component Level Outage
  
  Platforms affected:
  all platforms that support mmapplypolicy
  
  Functional Area affected:
  mmapplypolicy
  
  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