IJ33715: AFM NEEDS TO HANDLE FILESET LEVEL PERMISSION FLAGS SET DURING RECOVERY AND RESYNC

APAR status

• Closed as program error.

Error description

• GPFS has fileset level permissions
  which can deny setting the mode
  or EAs on the fileset entities depending on which mode
  this targets.
  AFM doesn't consider this flag on the fileset and we end up
  getting E_PERM from the home which causes the queue to get
  stalled. Normal queue goes fine, but its mostly the
  recovery or resync queue that hits this.
  

Local fix

• Drop those operations that stall the queue when
  the Fileset level permissions are enabled only at one of
  the 2 sites.
  

Problem summary

• GPFS has fileset level permissions
  which can deny setting the mode
  or EAs on the fileset entities depending on which mode
  this targets.
  AFM doesn't consider this flag on the fileset and we end up
  getting E_PERM from the home which causes the queue to get
  stalled. Normal queue goes fine, but its mostly the
  recovery or resync queue that hits this.
  

Problem conclusion

• This problem is fixed in 5.0.5  PTF 9
  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:
  Customers will be able to use
  the same Fileset level permissions
  flag (setAclOnly, ChmodOnly,
  chmodAndUpdateAcl etc.) set
  to the same value at both
  AFM Cache and AFM Home, and AFM
  will be able to handle the
  complications these flags brings
  in during AFM Recovery and Resync.
  
  Work around:
  Drop those operations that stall the queue when
  the Fileset level permissions are enabled only at one of
  the 2 sites.
  
  Problem trigger:
  Set the Same Fileset level permissions flag
  (setAclOnly, ChmodOnly, chmodAndUpdateAcl etc.) on
  both Cache/Primary and/or Home/Secondary sites and
  perform IO to the fileset and then
  run Recovery or Resync.
  
  Symptom:
  Unexpected Behavior.
  
  Platforms affected:
  ALL Linux OS 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