On Wed, Oct 31, 2012 at 1:33 PM, Maurits van de Lande < [email protected]> wrote:
> Hello Zohair,**** > > ** ** > > >So If I don't have real fencing device, I can't get a cluster?**** > > ** ** > > It depends, I have some clusters without fencing, they are mainly for > virtualization. The cluster is configured not to relocate the services in > case of a failure. I do this manually. (all services are redundant) The > Virtual Machine configuration files are stored on a GFS2 file system. I > configured this file system to be always available (also when quorum is > lost). Because I do all the recovering manually this does not matter, also > no data is written to the GFS2 file system.**** > > ** ** > > So, you can have a cluster without fencing if a quorum loss does not > corrupt your data. You should also set the cluster timeout’s in such a way > that even with a WAN connection the cluster does not loose quorum during > normal operation. (I have not tried this)**** > > ** ** > > For SAMBA you might need “clustered SAMBA” > http://ctdb.samba.org/samba.html > It usually comes later after a clustered file system **** > > ** ** > > Did you have a look at glusterfs? http://www.gluster.org/ It supports > synchronization (I do not know if it also works over a WAN connection) But > it has nothing to do with drbd. The drbd 8.3 branch is very mature I do > not know if this is the same for glusterfs.**** > > ** > I checked that earlier, but wanted to dig more into the problem why I am unable to achieve this with gfs Now considering glusterfs, lsync and csync2 Thanks alot for your help so far guys ** > > Best regards,**** > > ** ** > > Maurits**** > > ** ** > > ** ** > > *Van:* [email protected] [mailto: > [email protected]] *Namens *Zohair Raza > *Verzonden:* woensdag 31 oktober 2012 9:51 > *Aan:* Felix Frank > *CC:* [email protected] > > *Onderwerp:* Re: [DRBD-user] GFS2 freezes**** > > ** ** > > So If I don't have real fencing device, I can't get a cluster?**** > > ** ** > > My requirement is to synchronized two Samba boxes between remote > locations, I can't use rsync because of bandwidth consumption and system > processing each time it will run it will go through each file and see if it > is synced or not. **** > > ** ** > > While GFS seemed to be the right option, but as two servers are distant > from each other I can not have fencing device as it may experience power > outage or network failures quite often. **** > > ** ** > > What do you guys suggest in such scenario?**** > > ** ** > > Regards, > Zohair Raza**** > > ** ** > > ** ** > > On Wed, Oct 31, 2012 at 12:30 PM, Felix Frank <[email protected]> wrote:**** > > On 10/31/2012 12:02 AM, Lars Ellenberg wrote: > >>> Manual fencing is not in any way supported. You must be able to call > >>> > > 'fence_node <peer>' and have the remote node reset. If this doesn't > >>> > > happen, your fencing is not sufficient. > >> > fence_node <peer> doesn't work for me > >> > > >> > fence_node node2 says > >> > > >> > fence node2 failed > > Which is why you need a *real* fencing device > > for automatic fencing.**** > > ...which is bound to sound more than a little cryptic to the > uninitiated, I assume. > > An example for a "classical" fencing method is a power distribution unit > with network access. The surviving node accesses the PDU and cuts the > power to its peer. > This is just one example. Similar results can be achieved using > IPMI/ILOM technologies etc. > > HTH, > Felix**** > > _______________________________________________ > drbd-user mailing list > [email protected] > http://lists.linbit.com/mailman/listinfo/drbd-user**** > > ** ** >
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