[Gluster-users] AFR dates problem

Raghavendra G raghavendra.hg at gmail.com
Wed Dec 31 05:39:10 UTC 2008

On Tue, Dec 30, 2008 at 12:29 PM, Keith Freedman <freedman at freeformit.com>wrote:

> > > so, in the case where they both differ, how will we know which time
> will be
> > > associated with a file?
> >
> >The first subvol mentioned in the list is considered, if it is down,
> >then the next is considered.
> ok, so I made sure that my subvolume list on the servers is in the same
> order.
> I had always listed the local volume first and the remote one second,
> but it sounds like this would lead to each node using it's own
> timestamps or do all the servers in the AFR elect a preferred 'first'
> subvol?
> > > and will it fix the on-disk stamp or just ignore it provided the other
> > > subvol is online?
> >
> >It will not fix the time stamp if they differ.
> how about new files being replicated..  they'll get the timestamp of
> the server from which the source file is available?
> in other words.. if I add a new empty volume, and AFR copies
> everything to it... what dates will be on the local files?

During self-heal afr sets the timestamps (atime and mtime) to that of the
file on the source node.

> > > ideally, it will pick one, and make sure all the others are 'reset' to
> that
> > > so that if the preferred vol goes offline, timestamps don't suddenly
> get
> > > weird.
> >
> >True, but ideally all servers and clients should be time synced using
> >ntp. For example if clients
> >are not in sync, one of them might see time stamp of the future.
> mine are using ntp, so, again, if they differ,it's by microseconds.
> Keith
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Raghavendra G
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