IJ41831: THE MMBACKUP SHADOWDB FILE COULD CONTAIN DUPLICATE RECORDS IF A POLICY SCAN INITIATED BY MMBACKUP FAILS.

APAR status

• Closed as program error.

Error description

• If a policy scan, initiated from the mmbackup command,
  fails and the mmbackup shadowDB file contains an entry
  for a file that was previously backed up but is now deleted,
  and the inode of that file has been
  assigned to a newly created file,
  then the mmbackup shadowDB file will
  have duplicate records for that file.
  

Local fix

• Fix the root cause of policy scan failure and rebuild shadowDB.
  

Problem summary

• If a policy scan, initiated from the mmbackup command,
  fails and the mmbackup shadowDB file contains an entry
  for a file that was previously backed up but is now deleted,
  and the inode of that file has been
  assigned to a newly created file,
  then the mmbackup shadowDB file will
  have duplicate records for that file.
  

Problem conclusion

• This problem is fixed in 5.1.2 PTF 7
  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:
  The mmbackup command will properly handle the
  reassignment of an inode from a file
  with an entry in the shadowDB,
  which has been deleted, to a newly created file.
  
  Work around:
  Fix the root cause of policy scan failure and rebuild shadowDB.
  Problem trigger:
  This problem occurs under the following conditions:
   1. An entry exist in the mmbackup shadowDB
  for a file that has been deleted.
   2. The inode for the file described in condition 1 has been
  assigned to a newly created file that needs to be backed up.
   3. The policy scan done by mmbackup fails.
  Symptom:
  Component Level Outage
  Platforms affected:
  all platforms that support mmbackup
  Functional Area affected:
  mmbackup
  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