Clarification required reg., Redhat Cluster Suite

Serge Dubrouski sergeyfd at gmail.com
Fri Jun 9 13:59:20 UTC 2006


With Redhat CS ver 3.0 you have to use 2 shared as QUORUM partitions.
It just doesn't provide any other choices.

On 6/6/06, GVSM Siva Kumar <gvsm at nfc.ernet.in> wrote:
> Dear Sirs,
>        We have recently purchased Redhat Enterprise Linux ES version 3
> and Redhat Cluster Suite version 3 to establish a high availability
> cluster in Active/Passive configuration with shared storage.
>
>        As per documents available on Redhat's website, it is possible to
> establish a heartbeat mechanism over Ethernet. However, our system
> integrator feels that this is not possible with RHCS 3 and that heartbeat
> mechanism can only be established using a Quorum partition. The SI also
> believes that quorum based heartbeat is superior to Ethernet based
> heartbeat mechanism.
>
>        In this regard, can someone please clarify the following.
>
> 1) Whether Quorum partition is a superior mechanism for establishing
> heartbeat? If so, then in what aspects?
>   (Somehow, this looks strange, in an ethernet based heartbeat only
> network latencies are involved, which must be negligible with a ethernet
> crossover cable. Whereas quorum partition involves two latencies in
> writing/reading the quorum partition and the disk access time itself.
> Surely, a crossover ethernet based heartbeat must be superior to quorum
> partition.)
>
> 2) Is it not possible to establish heartbeat using an ethernet/serial
> crossover cable?
>        sivakumar
>
>
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