From: "John Stoffel" <john@stoffel.org>
To: Steve Bergman <sbergman27@gmail.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: Linux MD? Or an H710p?
Date: Mon, 21 Oct 2013 10:18:33 -0400 [thread overview]
Message-ID: <21093.14265.261728.755087@quad.stoffel.home> (raw)
In-Reply-To: <526328AE.2020908@gmail.com>
Steve> I'm configuring a PowerEdge R520 that I'll be installing RHEL
Steve> 6.4 on next month. (Actually, Scientific Linux 6.4) I'll be
Steve> upgrading to RHEL (SL) 7 when it's available, which is looking
Steve> like it might default to XFS.
Steve> This will be a 6 drive RAID10 set up for ~100 Gnome (freenx)
Steve> desktop users and a virtual Windows 2008 Server guest running
Steve> MS-SQL, so there is plenty of opportunity for i/o
Steve> parallelism. This seems a good fit for XFS.
So are you keeping home directories on here as well? And how busy
will the MS-SQL server be? That's probably where most of your IO will
come from I suspect. Also, make sure you get lots of memory. The
more your freenx server can cache in memory, the better things will
be.
I also note that under Centos 6.4 firefox 22 has a tendency to grow
without bound, sucking up all the memory and causing the system to bog
down. I admit I'm reading email via OWA, using Service Now, and lots
of tabs, but basically memory usage sucks. And I'm using freenx as
well to access my desktop.
I do admit I'm using a 3rd party repo, so I'm running:
firefox-22.0-1.el6.remi.x86_64
Steve> My preference would be to use Linux MD RAID10. But the Dell
Steve> configurator seems strongly inclined to force me towards
Steve> hardware RAID.
Skip the configurator and just buy a controller 3rd hand.
Steve> My choices would be to get a PERC H310 controller that I don't need,
Steve> plus a SAS controller that the drives would actually connect to, and use
Steve> Linux md. Or I can go with a PERC H710p w/1GB NV cache running hardware
Steve> RAID10. (Dell says their RAID cards have to function as RAID
Steve> controllers, and cannot act as simple SAS controllers.)
Steve> I also have a choice between 600GB 15k drives and 600GB 10k "HYB CARR"
Steve> drives, which I take to be 2.5" hybrid SSD/Rotational drives in a 3.5"
Steve> mounting adapter.
Is your key metric latency, or throughput?
John
next prev parent reply other threads:[~2013-10-21 14:18 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-20 0:49 Linux MD? Or an H710p? Steve Bergman
2013-10-20 7:37 ` Stan Hoeppner
2013-10-20 8:50 ` Mikael Abrahamsson
2013-10-21 14:18 ` John Stoffel [this message]
2013-10-22 0:36 ` Steve Bergman
2013-10-22 7:24 ` David Brown
2013-10-22 15:29 ` keld
2013-10-22 16:56 ` Stan Hoeppner
2013-10-23 7:03 ` David Brown
2013-10-24 6:23 ` Stan Hoeppner
2013-10-24 7:26 ` David Brown
2013-10-25 9:34 ` Stan Hoeppner
2013-10-25 11:42 ` David Brown
2013-10-26 9:37 ` Stan Hoeppner
2013-10-27 22:08 ` David Brown
2013-10-22 16:43 ` Stan Hoeppner
-- strict thread matches above, loose matches on Subject: below --
2013-10-23 19:05 Drew
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