PI29633: WMQFTE V7.0.4 Z/OS BLKSIZE IS SET EQUAL TO THE LRECL

WebSphere MQ File Transfer Edition V7.0 Fix Pack 7.0.4.5

APAR status

• Closed as program error.

Error description

• When transferring a file to a WebSphere MQ File Transfer Edition
  agent running on the z/OS platform, if the block size (BLKSIZE)
  dataset attribute was specified with the value zero (0) on the
  managed transfer request, the actual dataset BLKSIZE will be set
  equal to the LRECL which is inefficient. If the same dataset is
  allocated directly on the mainframe using TSO 3.2, the optimum
  system determined block size is used.
  

Local fix

• na
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  This issue affects users of WebSphere MQ File Transfer Edition
  who are performing file transfers to destination datasets on
  z/OS who specify a block size (BLKSIZE) attribute on the
  destination dataset with value zero.
  
  
  Platforms affected:
  z/OS
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  When a block size of zero for a transfer destination dataset was
  specified, WebSphere MQ File Transfer Edition should have
  allowed the system to determine the optimum block size to use.
  However, this was being filtered by the WebSphere MQ File
  Transfer Edition code such that no block size value was passed
  to the underlying z/OS C/C++ routines. This resulted in the
  block size being provided by these routines to the z/OS system
  which typically used a low value. For example a VB dataset will
  get a block size of 6144.
  

Problem conclusion

• The WebSphere MQ File Transfer Edition code has been corrected
  to ensure that when transferring to a file to a destination
  dataset, and the block size (BLKSIZE) attribute for the dataset
  is specified with the value zero, the destination agent will
  ensure that the system determined block size will be used when
  the dataset is allocated. This will also apply when other
  dataset attributes are specified but the block size is allowed
  to default.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v7.0       7.0.4.5
  v7.5       7.5.0.5
  v8.0       8.0.0.2
  
  The latest available FTE maintenance can be obtained from
  'Fix List for WebSphere MQ File Transfer Edition 7.0'
  http://www-01.ibm.com/support/docview.wss?uid=swg27015313
  
  The latest available MQ maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

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

  WMQ FTE Z/OS

• Fixed component ID

  5655U8000

Applicable component levels

• R704 PSY

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