[Pacemaker] 2 Node Cluster: some principal questions

[emmanuel segura]

One lvm vg in exclusive mode means just one node at time can access to the
data



Il giorno 22 marzo 2012 16:47, Lentes, Bernd <
bernd.lentes at helmholtz-muenchen.de> ha scritto:

> **
> Hi,
>
> thanks for the quick response. So the data is not destroyed if two
> identicals VM's access the LV simultaneouslay ? I thought it would be. I
> will have stonith too.
> What is about live migration ? Is it possible with my setup ?
>
>
> Bernd
>
>
> --
> Bernd Lentes
>
> Systemadministration
> Institut für Entwicklungsgenetik
> HelmholtzZentrum münchen
> bernd.lentes at helmholtz-muenchen.de
> phone: +49 89 3187 1241
> fax:   +49 89 3187 3826
> http://www.helmholtz-muenchen.de/idg
>
> Wer Visionen hat, soll zum Hausarzt gehen
> Helmut Schmidt
>
>
>  ------------------------------
> *From:* emmanuel segura [mailto:emi2fast at gmail.com]
> *Sent:* Thursday, March 22, 2012 4:12 PM
> *To:* The Pacemaker cluster resource manager
> *Subject:* Re: [Pacemaker] 2 Node Cluster: some principal questions
>
>  if you have in you cluster vg exclusive="yes" and remember it's good
> idea have stonith configured
>
> Il giorno 22 marzo 2012 15:52, Lentes, Bernd <
> bernd.lentes at helmholtz-muenchen.de> ha scritto:
>
>> Hi,
>>
>> i'd like to establish a 2 Node-Cluster. My OS will be SLES 11 and HAE. My
>> services will run in VM's using KVM. I will install the VM's in LV's, one
>> LV for one VM. The LV's will be plain partitions, having no filesystem. I
>> have read this is quicker with KVM than installing a VM in a LV with
>> filesystem.
>> My LV's will reside on a FC SAN. Both nodes have access to the SAN. For
>> the LV's, i will use cLVM.
>>
>> My questions are:
>>
>> - let's assume that, due to an error, a VM will run on both nodes. Does
>> cLVM prevent that both VM's have simultaneously access to the corresponding
>> LV ? So that the data is not destroyed.
>>
>> - Is it possible that some VM's run on the first node and other VM's run
>> on the second node simultaneously ?
>>
>> - what do you think about my setup ?
>>
>>
>>
>> Bernd
>>
>> --
>> Bernd Lentes
>>
>> Systemadministration
>> Institut für Entwicklungsgenetik
>> HelmholtzZentrum münchen
>> bernd.lentes at helmholtz-muenchen.de
>> phone: +49 89 3187 1241
>> fax:   +49 89 3187 3826
>> http://www.helmholtz-muenchen.de/idg
>>
>> Wer Visionen hat, soll zum Hausarzt gehen
>> Helmut Schmidt
>>
>> Helmholtz Zentrum München
>> Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH)
>> Ingolstädter Landstr. 1
>> 85764 Neuherberg
>> www.helmholtz-muenchen.de
>> Aufsichtsratsvorsitzende: MinDir´in Bärbel Brumme-Bothe
>> Geschäftsführer: Prof. Dr. Günther Wess und Dr. Nikolaus Blum
>> Registergericht: Amtsgericht München HRB 6466
>> USt-IdNr: DE 129521671
>>
>> _______________________________________________
>> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>>
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>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>> Bugs: http://bugs.clusterlabs.org
>>
>
>
>
> --
> esta es mi vida e me la vivo hasta que dios quiera
>
>
> ------------------------------
> Helmholtz Zentrum München
> Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH)
> Ingolstädter Landstr. 1
> 85764 Neuherberg
> www.helmholtz-muenchen.de
> Aufsichtsratsvorsitzende: MinDir´in Bärbel Brumme-Bothe
> Geschäftsführer: Prof. Dr. Günther Wess und Dr. Nikolaus Blum
> Registergericht: Amtsgericht München HRB 6466
> USt-IdNr: DE 129521671
>
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
>
>


-- 
esta es mi vida e me la vivo hasta que dios quiera
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