[OpenAFS] Last Update not updating?

Mike Polek mike@pictage.com
Tue, 10 Jan 2006 20:40:45 -0800

The vos release won't actually do any volume copying
if things are already up-to-date, but it takes a lot
longer to issue a vos release on a set of, say, 10
volumes than to check the dates and release the
one that has been updated.

Any chance of adding a switch to the vos exam command
so that if you do something like

vos exam my.vol -sync -cell pictage -local

you get the old behavior, and without the -sync
you get the new behavior? If I issue the 10
vos release commands, it will have to sync
anyway, and apparently do a lot more stuff.
Since I'm interested in the Last Update
field, it would be helpful to have a way to
make sure it's accurate. For the times when
I don't care, of course the new behavior is

Just a thought.


Horst Birthelmer wrote:
> On Jan 10, 2006, at 3:18 AM, Jeffrey Hutzelman wrote:
>> On Monday, January 09, 2006 04:43:47 PM -0800 Mike Polek  
>> <mike@pictage.com> wrote:
>>> Good to know. The reason I'm looking at it is that I have a perl
>>> script that will release a set of volumes, but only if they
>>> need it. It checks the updateDate of the volume and compares
>>> it to the updateDate of the cloneID if there is one to
>>> figure out if the volume needs to be released.
>> Yup; we have that too.  It doesn't notice changes made too close  
>> before it runs.  That's one of the reasons I'm looking at making  'vos 
>> examine' go back to the slower, more accurate results.
> Jeff, I remember our talk at the 2004 Hackathon about this.
> The problem was not that the examine took too long.
> The problem was, that you could cause timeouts on file transfers, if  
> you do a few 'vos examine' calls, due to the disk operations those  
> calls would trigger.
> I think it's trouble to go back.
> BTW, 'vos release' won't do any transfer if the RW volumes didn't  change.
> Horst

Michael Polek
Manager of System Operations
Pictage, Inc.

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