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Conference cookie::aim$notes:disk_defrag

Title:Disk File Optimizer (DFO) for OpenVMS
Notice:Kits and documents: last reply to note 1
Moderator:COOKIE::AMEND
Created:Tue May 16 1989
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:539
Total number of notes:2544

535.0. "Locking of .AIJ files." by NNTPD::"[email protected]" (Steve Henderson) Tue May 06 1997 03:07

Hello,

we have a customer who runs RDB (v6.1-02) with an image journal. 
When defrag is started on a disk with the .AIJ files on it locks the database
intermittently. Is there a way around this problem.

Thanks,

Steve Henderson. 
[Posted by WWW Notes gateway]
T.RTitleUserPersonal
Name		DateLines
535.1Does DEFRAGMENT SHOW disk/VOLUME give the same simptonsCOOKIE::AMENDTue May 06 1997 13:2220
Steve

  I do not believe that DFO is locking the database.  It treats
  any of these database files as open files.  However, when DFO
  starts up, he has to read all of the data out of INDEXF.SYS
  into memory.  I am not sure whether he takes out an exclusive
  lock or you just have two resources trying to access INDEXF.SYS
  or the disk at the same time.

  Do you get the same indication (of locking the database) when
  you do a $ DEFRAGMENT SHOW disk/VOLUME?  The SHOW command uses
  the same functions as the defragmentor does when it gathers
  data from INDEXF.SYS.

  What version of DFO are you running?  The Rdb you refer to is
  not the DFO Rdb database on version of DFO earlier than 2.1?

  thanks
     jim amend