[ale] File server syncronization

Greg Freemyer greg.freemyer at gmail.com
Wed Jan 27 16:00:35 EST 2010


Have you looked at DRBD. ("distributed replicated block device" I think)

It has been around since 2.4 days and is in heavy enterprise use, but
just finally got accepted into either 2.6.32 or .33

Opensuse has supported it on their Enterprise products for years, so
it should be pretty stable.

I don't know if there is a released vanilla kernel with it yet or not,
but if not now then in the next few weeks it should be out.  ie. I
think .33 is just a few weeks or less from release.

drbd offers various flavors of realtime access.

Also it can support a pure failover scenario, or an active-active.

For active-active you have to use a cluster aware filesystem.  There
are a couple of those in the vanilla kernel.  OCF2 is one example I
think.

Based on what little I see below, I would look at drbd in
active-active running OCF2.

Greg

On Wed, Jan 27, 2010 at 3:42 PM, David Ritchie <deritchie at gmail.com> wrote:
> ALEers...
>
> Looking trying to synchronize two file systems on an ongoing basis
> (i.e. a distributed file system). Just curious
> about your thoughts about things like rsync vs. Unison  or other tools
> you have seen...  Need to have files migrate over
> semi realtime (i.e. I drop a file in a directory, it should auto
> magically appear on a local directory on the remote machine - and
> there could be both data files and executable transferred)... Thoughts?
>
> Best regards,
> Dave Ritchie
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