IJ49586: MMFSCKX WILL TAKE LONGER TO RUN ON FILE SYSTEMS HAVING LARGE NUMBER OF INDEPENDENT FILESETS

APAR status

• Closed as program error.

Error description

• File systems that have large number independent filesets usually
  tend to have a sparse inode space.So if mmfsckx is run on such
  a file system having large sparse inode space then it will take
  longer to run as it unnecessarily parses over inode alloc map
  segments pointing to sparse inode spaces instead of skipping
  them.
  

Local fix

Problem summary

• File systems that have large number independent filesets usually
  tend to have a sparse inode space.So if mmfsckx is run on such
  a file system having large sparse inode space then it will take
  longer to run as it unnecessarily parses over inode alloc map
  segments pointing to sparse inode spaces instead of skipping
  them.
  

Problem conclusion

• This problem is fixed in 5.1.9.2
  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:
  mmfsckx will complete faster on file systems having large number
  of independent filesets
  
  Work Around:
  None
  
  Problem trigger:
  Run mmfsckx on file systems having large number of independent
  filesets
  
  Symptom:
  Slowness to complete run
  
  Platforms affected:
  All
  
  Functional Area affected:
  FSCKX
  
  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