[AusNOG] Back of envelope II

[David Hughes]

Hi

You can, and that's what I outlined in my response.  The easiest (and  
most transparent) approach is replication behind the virtualisation  
layer so the FC clients don't even see the difference.  We currently  
run SAN virtualisation at our datacentres which allows for not only  
replication, but also simple migration between types storage and even  
between facilities.  It is rather nice (albeit quite expensive).

We also run Dot1Q over EoMPLS between datacentres so we could in  
theory VMotion a VM between datacentres on the fly.  That'd be  
interesting ......


Thanks

David
...

On 06/03/2009, at 2:16 PM, Darren Moss wrote:

> G'Day,
>
> Why don't you take a different angle to storage (and database) and  
> replicate to alternate locations ?
>
> Then you can have a primary and failover system (could also form  
> part of DR plan).
>
> Cheers.
>
>
> Regards,
>
>
> Darren Moss
> General Manager, Director
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> -----Original Message-----
> From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-bounces at lists.ausnog.net 
> ] On Behalf Of David Hughes
> Sent: Friday, 6 March 2009 3:09 PM
> To: ausnog at ausnog.net
> Subject: Re: [AusNOG] Back of envelope II
>
>
> On 06/03/2009, at 12:34 PM, Skeeve Stevens wrote:
>
>> The ONLY solid way that I know to do good server redundancy is with
>> Virtual Platforms that support SAN, Fibre Channel/iSCSI with diverse
>> heads.
>
> And then your SAN storage goes flop and things look bad all over.  And
> anyone familiar with the QA of IBM storage controller firmware will
> know the feeling.
>
> So, add into that a SAN virtualisation layer, like IBM SVC so that you
> have the same data on multiple SANs
>
> And then add in a second datacentre for "real" redundancy.  Naturally,
> you''ll need layer 2 ethernet and fibre channel between those sites.
>
> Then clone yourself so multiple people have exactly the same skill
> set  ;-)
>
>
> I guess everyone has to pick their point in the "price vs return"  
> curve.
>
>
> David
> ...
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