R: R: [Linux-cluster] "Missed too many heartbeats" messages andhungcluster
Leandro Dardini
l.dardini at comune.prato.it
Thu Jun 29 13:38:24 UTC 2006
> -----Messaggio originale-----
> Da: linux-cluster-bounces at redhat.com
> [mailto:linux-cluster-bounces at redhat.com] Per conto di
> Fabrizio Lippolis
> Inviato: giovedì 29 giugno 2006 9.47
> A: linux clustering
> Oggetto: Re: R: [Linux-cluster] "Missed too many heartbeats"
> messages andhungcluster
>
> Leandro Dardini ha scritto:
>
> > A fencing device is required for granting consistency of
> write. If one node fails to comunicate with other devices, it
> can write in an unconditional mode and bye bye to GFS.
> > A fencing device is not only a power-fence device. In my
> case it is the fibre channel switch. When a node has to be
> fenced, other telnet to the fibre channel switch and turn off
> the port. This doesn't powercycle the device, but blocks the
> write on the shared device. What kind of shared device are you using?
>
> It's a GFS file system on a disk array. Since I built the
> cluster for MySQL and ldap services, it's the file system
> where actually are the database and directory files. The disk
> array is physically connected to both machines by a SCSI cable.
>
Is there a managemente console accessible via telnet/http where you can "disable" a port/host? If this is the case, you have already a fencing device.
Leandro
> --
> Fabrizio Lippolis
> fabrizio.lippolis at aurigainformatica.it
> Auriga Informatica s.r.l. Via Don Guanella 15/B -
> 70124 Bari
> Tel.: 080/5025414 - Fax: 080/5027448 -
> http://www.aurigainformatica.it/
>
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