In a former organization, we were using iSCSI-attached storage (EqualLogic
array, fairly low-end gear) with RHEL3 and 4; a few of these systems were
good about really beating on their attached disk. Really, not much in the
way of problems to speak of; iscsid consumes a bit more CPU than you'd
probably like, and using NICs that support TCP off-loading are a big help
(or iSCSI HBAs, although there's very little to choose from there).
Basically, if you're comfortable with managing fiber-attached disks, iSCSI
is a no-brainer. If you're concerned about performance, it sounds like you
have everything you need to run a few quick tests during an available
window?
(And I feel your pain about the XServe. ;-)
--
Edward S. Marshall <esm AT fnal DOT gov>
MIS Department Technical Services
Fermi National Accelerator Laboratory, Batavia, IL USA
Eugene Vilensky <evilensky AT GMAIL DOT COM>
Sent by: EMC NetWorker discussion <NETWORKER AT LISTSERV.TEMPLE DOT EDU>
07/29/2008 03:08 PM
Please respond to
EMC NetWorker discussion <NETWORKER AT LISTSERV.TEMPLE DOT EDU>; Please respond
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Eugene Vilensky <evilensky AT GMAIL DOT COM>
To
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cc
Subject
[Networker] NFS share as file device
Hello,
Some changes have taken place in our environment that leave me with a
free 23TB NAS. I currently have a 7.2.2 single server running RHEL3,
backing up about 180 clients across Windows 2000/2003, Linux, and
HPUX. I want to use the NAS exclusively for disk staging, trouble is
it only supports iSCSI and NFS (and SMB...).
Assuming all things are equal on the NAS, can anyone comment on
whether iSCSI or NFS is the way to go? I'm inclined to go NFS simply
because the iSCSI-initiator may not be as mature as the NFS
implementation in RHEL3, but I have no proof of that. How does NFS as
a file device perform, in generally? We've seen good raw numbers out
of the NAS device, my biggest worry is that the backup server is
getting long in the tooth and won't be able to keep up with both
incoming data streams and writing to NAS...then back to tape...through
multiple firewalls...with no jumbo frames...on the public cross-town
WAN...you can see where I'm going here...but the current disk stages
are Apple Xserver Raid, which I can't imagine getting any slower..
Thanks for any advice.
--
Eugene Vilensky
evilensky AT gmail DOT com
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