[Linux-cluster] Advice on Storage Hardware

[Michael Will]

Interesting. Now what is the point of having a separate supervisor
instead of the two nodes supervising each other? lack of stonith?

Michael
Rick Stevens wrote:
> On Fri, 2005-11-11 at 16:54 -0500, David Brieck Jr. wrote:
>   
>> On 11/11/05, Rick Stevens <rstevens at vitalstream.com> wrote:
>>     
>>> AC/NC's JetStor dual-SCSI stuff works for us under GFS.  We also have
>>> a couple of large SANs (each about 26TB), but the small stuff works on
>>> JetStors.
>>>
>>> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com
>>>       
>> So you have two host servers connected to the array in a failover
>> configuration? If this isn't the case would you mind explaining how
>> you have it setup to account for a host failing?
>>     
>
> Yes, that's how we have it.  The client machines mount the primary's
> NFS exports, and the secondary just sits there until needed.
>
> A third "supervisor" machine watches heartbeats and if the primary
> fails, it aliases the secondary's NICs with the IPs of the failed
> primary via an ssh command.  When the clients reconnect, they connect
> to the secondary server.
>
> The supervisor can watch multiple 2-server clusters since it's not very
> busy.  It ain't pretty, but it works.
>
> ----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
> - VitalStream, Inc.                       http://www.vitalstream.com -
> -                                                                    -
> -       "I'd explain it to you, but your brain might explode."       -
> ----------------------------------------------------------------------
>
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-- 
Michael Will
Penguin Computing Corp.
Sales Engineer
415-954-2822
415-954-2899 fx
mwill at penguincomputing.com