[Linux-cluster] DRBD with GFS applicable for this scenario?

[Gordan Bobic]

Zaeem Arshad wrote:
> On Fri, Jan 29, 2010 at 4:06 PM, Kaloyan Kovachev <kkovachev at varna.net> wrote:
> 
>> If you use DRBD on top of the SANs you should access the drbd resource from
>> the other nodes. I have similar setup: DAS in two servers replicated via DRBD
>> in active/active mode, then they are exported via iscsi and used from the
>> nodes (and the storages are nodes too) with multipath multibus.
>>
>> In your case the fencing is the main problem ... instead of SMS you may use
>> the mobiles as GPRS modems directly to the remote fence device
> 
> 
> I have worked out heuristic checks and the associated scored for
> quorum disk to be put in. I have tried to work out on paper the
> different scenarios that will play out and how the cluster membership
> should work based on the eventual score. I think I can do away with
> the GPRS modems for now but I will definitely integrate them in the
> solution at a later stage.

Indeed - the only failure mode that you need GPRS modems for is if the 
inter-site link goes down.

Gordan