JR38446: ADD ABILITY IN PARALLEL ENGINE TO SPECIFY NODE POOLS FOR MMAP FILES CREATED BY TSORT AND LOOKUP PROCESSES.

IBM InfoSphere Information Server, Version 8.5 Fix Pack 2

APAR status

• Closed as new function.

Error description

• Customer has requested to provide a way to specify the
  location/path for the memory mapped files (mmap files) created
  by the Sort stage.
  Customer wants the Sort stage to create scratch files and mmap
  files on different file systems.
  
   To create mmap files in directories that you specify:
  Edit the configuration file to specify the directory that you
  want the mmap file or the scratch file to be created in. For
  example:
  {
    node "<server1>"
    {
      fastname "server1"
      pool ""
      resource scratchdisk "/ORCHESTRATE/orch_master/apt/scratch"
  { }
      resource scratchdisk "/ORCHESTRATE/orch_master/apt/scratch1"
  { pool "sort" }
      resource scratchdisk "/ORCHESTRATE/orch_master/apt/scratch2"
  { pool "mmap" }
    }
  }
  

Local fix

Problem summary

• ****************************************************************
  
  USERS AFFECTED:
  IS Datatsage 8.1
  ****************************************************************
  
  PROBLEM DESCRIPTION:
  Sort stage creates scratch files and mmap files in the process
  of sorting the given data. Generally both these files are
  created in the same location specified by scratch disks in the
  disk pool "sort".
  Scratch disks information is specified in the configuration
  file.
  Customer wants the Sort stage to create scratch files and mmap
  files in different locations. Customer should be provided a
  method to do this.
  ****************************************************************
  
  RECOMMENDATION:
  Please install the patch for the APAR JR38446. Edit the
  configuration file to include mmap pools for the scratchdisk.
  Ex:
  {
    node "kitt-eth-1"
    {
      fastname "kitt-eth-1"
      pool ""
      resource scratchdisk "/ORCHESTRATE/orch_master/apt/scratch"
  { }
      resource scratchdisk "/ORCHESTRATE/orch_master/apt/scratch1"
  { pool "sort" }
      resource scratchdisk "/ORCHESTRATE/orch_master/apt/scratch2"
  { pool "mmap" }
    }
  }
  

Problem conclusion

• Code changes have been made such that a new pool "mmap"
  mentioned in the configuration will be recognized by the Sort
  and Lookup stages.
  Sort and Lookup stages will use the location specified by
  scratch disks in the disk pool "mmap" to create the mmap files.
  

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

  WIS DATASTAGE

• Fixed component ID

  5724Q36DS

Applicable component levels

• R850 PSY

     UP