[Gllug] SANs

[Tethys]

"Daniel P. Berrange" writes:

>Setting up & running a clustered filesystem &/ SAN is certainly
>not for the faint hearted ; a lot more complex than a managing
>a regular NFS file server. 

Indeed. However, the original post mentioned nothing about clustered
filesystems. The OP was looking at SAN as a cheaper alternative to
replacing an existing directly attached RAID array with a larger one.
For that, pretty much any SAN would do, and you'd just put a regular
filesystem on it. That way, you've then got the infrastructure in
place should you later want to move to a clustered filesytem to allow
concurrent access from a number of nodes.

It's slightly more expensive that just sticking with the directly
attached storage approach. However, if you have more than one server
needing storage, a single SAN, suitably partitioned can be much
cheaper than providing comparable directly attached storage, even
if you have a 1:1 mapping between filesystems and machines accessing
them. Remember, SANs aren't always synonymous with clustering.

Tet
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