[DRBD-user] drbd 0.8 primary/primary limit question
pc at matrixonline.co.uk
Thu Dec 27 11:19:40 CET 2007
> Current project is asking for a clustered file system to be used in a
> small web farm. Unfortunately, NFS is not an option at this point, for
> budget constraints... small client...
Do you really need a cluster filesystem for a web farm? Would it not
make life a lot simpler to just rsync the web content periodically?
> Researching alternative options... and seeing DRBD primary/primary
> option with OCFS2 as a feasible alternative.
> Question... You can only have 2 primary/primary nodes in such setup,
> correct? In my case, if I got a 3rd web server, client would have to
> procure a NAS...
You could just run normal primary/secondary on two nodes and share the
drbd volume (or parts of it) using NFS and heartbeat. There is no need
for a separate NAS appliance.
If you really want to use DRBD across three nodes then the commercial
version (DRBD+) can mirror across 3 nodes - I am not sure if that is
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