[Gluster-users] metadata for stat : Should it be identical?

James purpleidea at gmail.com
Thu Oct 24 23:31:06 UTC 2013

On Thu, 2013-10-24 at 13:00 -0700, Robert Hajime Lanning wrote:
> Design philosophy...
> There is no metadata server.  When you look at timestamps in stat,
> you 
> are seeing the real stat of the file.
So this raises an interesting point...

> If you have "replica 2" then you have two files.  The stat can come
> from 
> either one.  Mtime will be the modification time of the file
If the replica N files all have slightly different mtimes (it seems they
usually will because they weren't written at exactly the same time),
then isn't this a point of inconsistency for a script running on a fuse
mount which expects the same mtime on a file?

Shouldn't gluster somehow coordinate to set all the files mtimes to be
consistent to say the last mtime in the replica set?

>  referenced 
> by the time on the server (not the client.)
> One of the strengths of GlusterFS is that it does not have the 
> bottleneck/single point of failure of a single metadata server.

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