[Linux-cluster] Can two clusters have same name?

[ramesh kasula]

u stupids , dont send any mails to me, remove my mail from ur  group

2009/3/16 Chaitanya Kulkarni <chattygk at gmail.com>

> Thanks for your reply Chrissie.
>
> But is this, i.e. deployment of clusters with same name, a valid scenario?
> How often (as in say 1 in a 100) may I see such deployments, if at all?
>
> Thanks,
> Chaitanya
>
> On Mon, Mar 16, 2009 at 1:28 PM, Chrissie Caulfield <ccaulfie at redhat.com>wrote:
>
>> Chaitanya Kulkarni wrote:
>> > Hi All,
>> >
>> > What happens if in the same network, we try to create two clusters with
>> > the same name?
>> >
>> > Does it cause any problem?
>>
>> YES LOTS!
>>
>> At best the two clusters will merge into one, at worst you will get node
>> evictions because of clashes between node IDs
>>
>> Actually you *can* do this if you change the cluster_id/multicast
>> address or port number in cluster.conf. But need to be careful and it is
>> not recommended.
>>
>> The main reason I say not to do this is that GFS volumes have the
>> cluster name embedded in the super block. If you have two clusters with
>> the same cluster name on the same SAN then it's going to be very easy to
>> totally corrupt the GFS filesystem by mounting it on two different
>> clusters.
>>
>>
>> Chrissie
>>
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>
>
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