IJ39283: REDUCE THE METADATA REPLICATION.

APAR status

• Closed as program error.

Error description

• If the system pool is also used for data, auto
  recovery mis-calculates avaiable metadata fg
  count and may trigger tsrestripefs -r  wrongly.
  

Local fix

• Do not use system pool for data.
  

Problem summary

• If the system pool is also used for data, auto
  recovery mis-calculates avaiable metadata fg
  count and may trigger tsrestripefs -r  wrongly.
  

Problem conclusion

• This problem is fixed in 5.1.2 PTF 4
  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:
  Reduce the metadata replication.
  
  Work around:
  Do not use system pool for data.
  
  Problem trigger:
  If the system pool is used for both data and metadata
  in a FPO cluster and if a disk/node failure causes
  the good failure group count to become less than
  the default metadata replication.
  
  Symptom:
  Unexpected Results/Behavior
  
  Platforms affected:
  All linux
  
  Functional Area affected:
  FPO
  
  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