[Csync2] cysnc2 vs linking hackery

[Giampaolo Tomassoni]

From: csync2-bounces at lists.linbit.com
> Hi Rafiu,
> 
> > Hi all,
> > 
> > I've been reading about csync2 and want to find out whether it can 
> > be recommended for use in DRBD+HA setup instead of the metadata 
> > volume + FS links method. I've never liked the latter way of doing 
> > it and if csync2 is an option it certainly would solve a heck of a 
> > number of configuration problems for me.
> 
> I'm not sure I full understand your requirements but I currently 
> use csync2 
> in a DRBD+HA environment without any issues.
> 
> The clustering software I use is linuxha.net, which handles all the 
> heartbeat, failover, drbd, etc while csync2 just synchronises 
> config files 
> between the machines.
> 
> Have been using this for well over a year now with no dramas.

I guess Rafiu would like to sync metadata with it. If this is the case, I'm not shure csync2 can help.

Don't know what's supposed to be in /var/lib/nfs (it's years I don't use it anymore), but the content of /var/cache/samba looks like a lot of BDBs, which are not safe to be syncd through csync2.

giampaolo

> Michael.
> 
> > I read in an ML post that csync2 is only recommended for slow 
> > changing config files. How would that apply to metadata for services 
> > like nfs , Samba/winbind etc. Could I use csync2 to replicate 
> > /var/lib/nfs and /var/cache/samba for instance?
> > 
> > If csync2 is not the way to go, how about a cross between the 
> > metadata volume and some other [d|i]notify based solution where 
> > local changes (on active primary) are synced to the metadata volume 
> > and then synced back to place (on passive secondary), controlled as 
> > a heartbeat resource, when a failover occurs.
> > 
> > TIA
> > 
> > R.
> 
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