[529] in SIPB-AFS-requests
Re: SIPB cell really slow
daemon@ATHENA.MIT.EDU (Bill Sommerfeld)
Tue Nov 5 18:42:50 1991
Date: Tue, 5 Nov 91 18:42:29 -0500
From: Bill Sommerfeld <wesommer@Athena.MIT.EDU>
To: Derek Atkins <warlord@Athena.MIT.EDU>
Cc: sipb-afsreq@Athena.MIT.EDU
In-Reply-To: SIPB-AFS-requests:[528]
Very possible... I was on ronald-ann at the time, and it had a load
of around 3-4!!! Not sure exactly what was causing it -- the AFS
software was up near the top! Don't forget, the SIPB AFS cell only
has one database machine, and the SIPB Locker is in the cell...
Which processes were up at the top?
Quick guide to AFS server processes:
bosserver: the "boss": starts & stops servers.
Does very little actual work.
This is controlled by "bos".
vlserver: volume location server
This maintains a database translating volume names to
volume id's, and returns volume locations to AFS clients.
This is used by the AFS file system client, vos, and the
backup suite.
ptserver: protection server.
Maintains group memberships of users in the cell.
This is used by "pts" and the AFS file server.
volserver:
This handles administrative access to volumes:
create/delete volumes, dumps, restores, backups, ...
This is used by vos and the backup suite.
fileserver:
This handles "normal" access to files in volumes:
create/delete/rename/read/write/...
When I looked a while ago, the load was back to normal volserver
seemed to have used more CPU time than any of the other servers.. like
100 minutes vs. 70-80 for the file server, and much less for any other
process. Was someone doing backups at the time?
- BIll
