  Batch log files and disk fragmentation? 
 The Question is:
 
We are experiencing problems with disk fragmentation on our RZ28's. The
defrag utility is showing us a fragmentation index of 99.9% on some disks
after only 1 week. We can see that the problem lies with our batch
application log files which are being cont
inually extended. The resulting log file sizes are, however, the same every
week. Disk space is not a problem.
 
My question is, can we create the log files
( possibly using FDL to predetermine their
size ) and then submit our batch jobs to use the pre-created log files
instead of the jobs ignoring them and creating their own ?
 
 
 The Answer is:
 
  Consider setting the SET VOLUME/EXTENSION size value on the target disk
  volume(s).
 
  On a system-wide basis, the RMS_EXTEND_SIZE system parameter can be of
  some interest.
 
  Alternatively, consider targeting the log files at one or more (scratch)
  volumes.
 
