JR33508: BOUNDED LENGTH FIELDS USE STORAGE EQUAL TO THEIR MAX LENGTH INST EAD OF ACTUAL DATA LENGTH CAUSING DATASET TO USE MORE STORAGE

APAR status

• Closed as program error.

Error description

• Bounded length fields use storage equal to their max length
  instead of the actual data length, causing persistent datasets
  to use more storage than necessary.
  

Local fix

• This fix is included in 8.0.1 fixpack 3
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Users of parallel jobs in InformationServer 7.x and above.
  ****************************************************************
  PROBLEM DESCRIPTION:
  Bounded length fields in parallel jobs are treated as fixed
  length for performance reasons.  This can make storing
  persistent datasets take up much more storage on disk than the
  actual data requires.
  ****************************************************************
  RECOMMENDATION:
  Install patch JR33508
  This change is included in 8.1 Fix Pack 1.
  ****************************************************************
  

Problem conclusion

• An environment variable was added APT_COMPRESS_BOUNDED_FIELDS.
  When set bounded length fields will be modified into variable
  length for disk storage and then back to bounded length when
  read from disk.  Depending on the record schema this can result
  in a large savings in the size of the persistent data files.
  Itdoes require extra processing time during the reading and
   writing of the data files.  This is the trade off for the space
  reduction.  This environment variable should only be set when
  creating new datasets, it should not be set when appending to
  existing datasets.
  

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:

Modules/Macros

• SERVER
  

Fix information

• Fixed component name

  WIS DATASTAGE

• Fixed component ID

  5724Q36DS

Applicable component levels

• R801 PSN

     UP