[Gluster-users] Switch recommendations

John Lauro john.lauro at covenanteyes.com
Fri Jan 27 13:38:02 UTC 2012

If you are considering as much as £3500 for a switch, you might want to
consider infiniband qdr instead. We don't currently have it here, but are
considering it.  From what I can it has lower latency, can do 40gbps, is
reasonably priced (slightly better than 10gbe, not comaring directly to
gb) .  That said, you would also have to budget for cards and cables even
though the switch price by itself is not so bad...

As you have multiple switches (sounds like 5524 or maybe 5424), the first
next to 0 cost change you should do (if not already done) is setup a LAG
between the switches and run 2-4 cables between switches instead of 1.

> -----Original Message-----
> From: gluster-users-bounces at gluster.org [mailto:gluster-users-
> bounces at gluster.org] On Behalf Of Dan Bretherton
> Sent: Friday, January 27, 2012 8:05 AM
> To: gluster-users
> Subject: [Gluster-users] Switch recommendations
> Dear All,
> I need to buy a bigger GigE switch for my GlusterFS cluster and I am
> trying to decide whether or not a much more expensive one would be
> justified.  I have limited experience with networking so I don't know if
> it would be appropriate to spend £500, £1500 or £3500 for a 48-port
> switch.  Those rough costs are based on a comparison of 3 Dell
> Powerconnect switches: the 5548 (bigger version of what we have now),
> the 6248 and the 7048.  The servers in the cluster are nothing special -
> mostly Supermicro with SATA drives and 1GigE network adapters.  I can
> only justify spending more than ~£500 if I can be sure that users would
> notice the difference.  Some of the users' applications do lots of small
> reads and writes, and they do run much more slowly if all the servers
> are not connected to the same switch, as is the case now while I don't
> have a big enough switch.  Any advice or comments would be much
> appreciated.
> Regards
> Dan.
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