Re: [Linux-cluster] A few GFS newbie questions: journals, etc

[Patrick Caulfield <pcaulfie redhat com>]

Nate Carlson wrote:
> On Fri, 24 Jun 2005, Lon Hohberger wrote:
> 
>> Yes, as long as more than half the VMs were on the surviving node as
>> well...
>>
>> If exactly half of the nodes votes disappear, a quorum no longer
>> exists (except in the 2-node special case).  Suppose there were 4 VMs:
>>
>>   2 x 50 votes = 100 votes
>>     4 x 1 vote =   4 votes
>>          Total = 104 votes
>> ---------------------------
>> Need for quorum =  53 votes
> 
> 
> Is it possible to tweak the votes needed for quorum with
> 'expected_votes'? I've been playing with it a bit, and it seems to work.

Yes, you can force expected_votes to be an unreasonable low value. Personally I
set it to 1 on my single-machine Xen test cluster but then I don't care about
data corruption ;-)


> Really, in my case, as long as one of physical hosts is still up, I'd
> still like to have a quorum.
> 



-- 

patrick