IJ45549: DATA MISMATCH ON LIVE FILESET WITH AFMFASTCREATE AND RESYNC RUN

APAR status

• Closed as program error.

Error description

• This issue happens when afmFastCreate is enabled and a file is
  created and written to, and immediately a changeSecondary is run
   on the fileset (pushing the File Create through fastCreate to
  the Resync snapshot) on a Primary fileset.In this case, the file
   is written from the psnap0 snapshot to keep this snapshot
  consistent across the sites and sacrifices the data consistency
  on live fileset.
  

Local fix

Problem summary

• This issue happens when afmFastCreate is enabled and a file is
  created and written to, and immediately a changeSecondary is run
   on the fileset (pushing the File Create through fastCreate to
  the Resync snapshot) on a Primary fileset.
  In this case, the file is written from the psnap0 snapshot to
  keep this snapshot consistent across the sites and sacrifices
  the data consistency on live fileset.
  

Problem conclusion

• This problem is fixed in 5.1.2.10
  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:
  Consistency of the file on the live fileset - while sacrificing
  the consistency on psnap0 snapshot.
  
  Work around:
  None
  
  Problem trigger:
  Running ChangeSecondary on DR fileset with afmFastCreate enabled
  while still writing to a single file.
  
  Symptom:
  Unexpected Behavior
  
  Platforms affected:
  All Linux OS environments (Serving as AFM Gateway nodes).
  
  Functional Area affected:
  AFM
  
  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