IJ35258: READING AN EVICTED FILE IN A SNAPSHOT AT THE AFM CACHE SITE SHOULD RETURN AN EIO AND FAIL ALWAYS.

APAR status

• Closed as program error.

Error description

• Reading an evicted file in a snapshot at the AFM
  cache site should return an EIO and fail always.
  

Local fix

• Set the afmSnapUncachedRead
  config to yes at the cluster level
  and then read the file in the snapshot to get the EIO error.
  

Problem summary

• Reading an evicted file in a snapshot at the AFM
  cache site should return an EIO and fail always.
  

Problem conclusion

• This problem is fixed in 5.0.5  PTF 11
  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:
  Be able to read large files which are evicted in the snapshot
  and be able to get an error and not read empty blocks from
  the snapshot.
  
  Work around:
  Set the afmSnapUncachedRead
  config to yes at the cluster level
  and then read the file in the snapshot to get the EIO error.
  
  Problem trigger:
  Evict a file from the fileset, Create a local snapshot and then
  try to read the evicted file from the snapshot.
  
  Symptom:
  Unexpected Behavior
  
  Platforms affected:
  All Linux and AIX Operating system environments.
  
  Functional Area affected:
  AFM
  
  Customer Impact:
  Suggested
  

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