Thanks to all who replied.  The consensus is that although the first 
     defragcron to hit a domain should lock it and prevent any mischief, 
     you should only defragcron a domain from one host at once.  There was 
     an honorable mention for using vfast instead, but I think that's only 
     available on 5.1B.
     
     John
______________________________ Reply Separator _________________________________
Subject: defragcron on CFS volumes
Author:  John Speakman at mskcc,BIOST
Date:    6/23/2003 11:40 AM
Hi all
     
A quick question about defragcron.  By default (if you uncomment it) it 
will defrag all mounted AdvFS (presumably including CFS) volumes.  My 
question is: if you have a two-node cluster with shared CFS volumes on 
an EVA, should you allow defragcron to run on both systems or just one; 
if on both, is there a chance that both hosts will try and defrag the 
same volume at once and get confused?  We are running 5.1APK4.
     
Thanks
John
     
John Speakman - Manager, Clinical Research Systems
Division of Biostatistics, Memorial Sloan-Kettering Cancer Center 
307 East 63rd Street, New York, NY 10021, USA
Phone: 646 735 8187 / Fax: 646 735 0013 / E-mail: 
speakman_at_biost.mskcc.org
 
     =====================================================================
     
     Please note that this e-mail and any files transmitted with it may be 
     privileged, confidential, and protected from disclosure under 
     applicable law. If the reader of this message is not the intended 
     recipient, or an employee or agent responsible for delivering this 
     message to the intended recipient, you are hereby notified that any 
     reading, dissemination, distribution, copying, or other use of this 
     communication or any of its attachments is strictly prohibited.  If 
     you have received this communication in error, please notify the 
     sender immediately by replying to this message and deleting this 
     message, any attachments, and all copies and backups from your 
     computer.
Received on Tue Jun 24 2003 - 12:59:51 NZST