IJ29884: IMPROVE PERFORMANCE OF AIO OPERATIONS ON ENCRYPTED FILE SYSTEMS

APAR status

• Closed as program error.

Error description

• AIO operations on encrypted files are handled
  as buffered IO, further decreasing the
  performance of the AIO operation in addition to
  the crytographic overhead introduced by
  the encryption of files in the file system.
  

Local fix

Problem summary

• AIO operations on encrypted files are handled
  as buffered IO, further decreasing the
  performance of the AIO operation in addition to
  the crytographic overhead introduced by
  the encryption of files in the file system.
  

Problem conclusion

• Benefits of the solution:
  The performance impact of AIO operations on
  encrypted file systems are limited to only
  the performance overhead of the cryptographic
  operation.
  
  Work around:
  None
  
  Problem trigger:
  Use of AIO
  
  Symptom:
  Performance Impact/Degradation
  
  Platforms affected:
  AIX/Power only
  
  Functional Area affected:
  Encryption
  
  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