Clustered storage options -- desperately seeking advice

Chance Reschke reschke at
Tue Oct 23 11:10:16 CDT 2007


We've had great success with Polyserve as a clustered SAN/NFS gateway  
(clustered NAS) solution.  The product is also used to do clustered  
database stuff.  Dell has sold us the Polyserve software in the past  
because we wanted it and because our Dell sales people are great, but  
I'm not sure how willing they'll be now that Polyserve is owned by HP.

On the storage hardware side of things, you might find better price/ 
performance elsewhere.  The Dell/EMC fibre channel gear is  
expensive.  Ingenio gear resold through Sun and SGI (and others, I'm  
sure) might be worth considering.  If this is really important stuff,  
all of the major SAN storage hardware vendors can sell you  
replication and snapshot upgrades to their gear.

  - Chance

Chance Reschke
Department of Biochemistry
University of Washington

On Oct 23, 2007, at 8:26 AM, Mike Mitchell wrote:

> Hi all,
> I am trying to nail down what equipment I need to be looking for that
> works well for:
> 1. Storage of online database files (specifically EnterpriseDB) in
> clustered fashion.  I.e. I have two servers accessing the same
> storage simultaneously to facilitate speedy recovery upon primary DB
> server failure.
> 2. General fileserving to a larger number of servers via NFS or
> something similar (iSCSI perhaps).  This also needs to be redundant/
> clustered such that one server going down doesn't prevent storage
> access by the other servers.
> If I can accomplish both of these things with one storage box that
> would be ideal.  However, a number of questions have come up that I
> don't know the answers to--perhaps someone on this list does?:
> 1. Would iSCSI connections to a RAID-10 filesystem work well for a
> database that needs to be high-performance transactional processing?
> Or is Fibre/SAS to be preferred for some reason?
> 2. I don't know much about iSCSI yet--is it suitable (or even
> possible) to connect lots of servers to the same storage unit for
> shared fileserving, or is it preferable to just connect a couple via
> iSCSI as a storage cluster and then NFS to the rest?
> 3. It seems like all the storage options Dell has are not really
> officially supported via a RedHat storage cluster--is anyone using
> any storage from Dell (or anyone else) in this configuration and has
> some experience to share on its performance, issues, manageability,
> etc.?
> Help!  Time is short, thanks...
> /mike
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