Etch amd64 + perc6/E RAID arrays + clustering (heartbeat)

[Erik M. Cummings]

Depending on what kind of throughput you are going to be pushing - you  
could use DRBD http://www.drbd.org/

I have used it quite a bit - for MySQL databases.  It works extremely  
well - and it looks like they've even updated the docs and webpage so  
it won't be NEARLY as confusing to get it going as when I was first  
learning it.

DRBD is block level network replication.  Sits between your partition  
and your filesystem.

Erik M. Cummings
Director of Network Operations
Autonet Mobile


On Oct 9, 2008, at 3:02 PM, admin at matphot.com wrote:

> Dear All,
>
> First off, I've got four PE1950 machines running amd64 etch, each
> managing two MD1000's through perc6/E SATA controllers.
>
> My goal is to develop an always-available, high-security (high
> performance if possible) data storage system.
>
> Assuring the security/performance of the storage space under each
> server is not a great problem (either RAID 10 or RAID 50 or RAID 51),
> but I would like to consider perc6/E card failure, or the failure of a
> server itself, as I would like to provide a failproof-as-possible
> service that would be available uninterrupted around the clock. My
> idea was to have one server managing two first-level RAID 5 arrays
> 'mirrored' (clustered) to another managing also two first-level RAID
> arrays, with the content of one RAID array on one server 'mirrored' to
> another under the other server.
>
> I have read up on "heartbeat" (heartbeat-2) and it seems to do what I
> need as far as clustering servers goes, but what I can't find is a
> means to 'cluster' (or 'mirror') the contents of one RAID array to
> that of another under another server. Is this possible, or am I
> looking in the wrong place?
>
> I am still rather new to this, so any and all advice would be a great
> help.
>
> Thanks, best,
>
> J.M.S.
>
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