IJ25905: NEWLY-CREATED FILESET STARTS OUT WITH HIGH IN-DOUBT VALUES

APAR status

• Closed as program error.

Error description

• When a new fileset is created, the in-doubt quota shares
  for that fileset should start out at 0.
  
  In some situations, a fileset can be created and start
  out with a non-zero in-doubt value. This can occur
  when a fileset had been deleted previously, and then
  the new fileset re-uses the same ID that the deleted
  fileset had used.
  
  Known impact:
  
  If the in-doubt value is unnecessarily high, then
  the quota limit could be reached long before the
  data or files used actually get that high. It could
  even be possible for the in-doubt value to start
  out so high that no files can be created in the new
  fileset at all.
  
  Normally, the in-doubt will decrease as the actual used
  values are adjusted by the quota manager. In this
  scenario, the bogus in-doubt value cannot be decreased
  because there is no client that can return those quota
  shares.
  
  The in-doubt value for the fileset begins high and
  stays high.
  
  Verification Steps:
  
  The mmrepquota command shows the in-doubt value for
  blocks
  and for file counts. If it is showing a high value for
  either of these for a new fileset, then it could be due
  to this defect.
  
  Recovery action:
  
  Running mmcheckquota will reset all of the in-doubt
  values
  .
  

Local fix

• Running mmcheckquota will reset all of the in-doubt
  values.
  

Problem summary

• When a new fileset is created,
   the in-doubt quota shares
   for that fileset should start out at 0.
  
   In some situations, a fileset
   can be created and start
   out with a non-zero in-doubt value.
   This can occur
   when a fileset had been
   deleted previously, and then
   the new fileset re-uses
   the same ID that the deleted
   fileset had used.
  

Problem conclusion

• Benefits of the solution:
  No more running out of quota before
  you actually run out of quota.
  
  Work Around:
  Running mmcheckquota will reset all
  of the in-doubt values
  
  Problem trigger:
  
  Symptom:
  
  Platforms affected:
  
  ALL Operating System environments
  
  Functional Area affected:
  Quotas
  
  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:

  IJ27026

Fix information

• Fixed component name

  SPEC SCALE ADV

• Fixed component ID

  5737F35AP

Applicable component levels