From: "Keld Jørn Simonsen" <keld@keldix.com>
To: "Mathias Burén" <mathias.buren@gmail.com>
Cc: Stan Hoeppner <stan@hardwarefreak.com>,
Roman Mamedov <rm@romanrm.ru>, CoolCold <coolthecold@gmail.com>,
Linux-RAID <linux-raid@vger.kernel.org>
Subject: Re: Performance question, RAID5
Date: Mon, 31 Jan 2011 09:52:02 +0100 [thread overview]
Message-ID: <20110131085202.GA25912@www2.open-std.org> (raw)
In-Reply-To: <AANLkTikLX-d6CtXhLBQU_qoxx0fQ2HdR8acFCU+o9JeP@mail.gmail.com>
If your intallation is CPU bound, and you are
using an Atom N270 processor or the like, well some ideas:
The Atom CPU may have threading, so you could run 2 RAIDs
which then probably would run in each thread.
It would cost you 1 more disk if you run 2 RAID5's
so you get 8 TB payload out of your 12 GB total (6 drives of 2 TB each).
Another way to get better performance could be to use less
CPU-intensitive RAID types. RAID5 is intensitive as it needs to
calculate XOR information all the time. Maybe a mirrored
raid type like RAID10,f2 would give you less CPU usage,
and the run 2 RAIDS to have it running in both hyperthreads.
Here you would then only get 6 TB payload of your 12 GB disks,
but then also probably a faster system.
Best regards
keld
next prev parent reply other threads:[~2011-01-31 8:52 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-29 22:48 Performance question, RAID5 Mathias Burén
2011-01-29 22:53 ` Roman Mamedov
2011-01-29 23:44 ` Mathias Burén
2011-01-29 23:57 ` Roman Mamedov
2011-01-30 0:15 ` Stan Hoeppner
2011-01-30 0:33 ` Mathias Burén
2011-01-30 0:27 ` Mathias Burén
2011-01-30 1:52 ` Keld Jørn Simonsen
2011-01-30 1:54 ` Mathias Burén
2011-01-30 5:56 ` Keld Jørn Simonsen
2011-01-30 12:12 ` Mathias Burén
2011-01-30 19:44 ` Stan Hoeppner
2011-01-30 19:46 ` Mathias Burén
2011-02-01 11:37 ` John Robinson
2011-02-01 13:53 ` Roberto Spadim
2011-02-01 14:02 ` Mathias Burén
2011-02-01 14:32 ` Roberto Spadim
2011-01-29 23:26 ` CoolCold
2011-01-30 0:18 ` Mathias Burén
2011-01-30 4:44 ` Roman Mamedov
2011-01-30 12:09 ` Mathias Burén
2011-01-30 12:15 ` Roman Mamedov
2011-01-30 19:41 ` Mathias Burén
2011-01-30 19:54 ` Roman Mamedov
2011-01-30 19:58 ` Mathias Burén
2011-01-30 20:03 ` Stan Hoeppner
2011-01-30 21:43 ` Mathias Burén
2011-01-31 3:39 ` Stan Hoeppner
2011-01-31 3:54 ` Roberto Spadim
2011-01-31 8:52 ` Keld Jørn Simonsen [this message]
2011-01-31 9:37 ` Mathias Burén
2011-01-31 13:11 ` Keld Jørn Simonsen
2011-01-31 14:43 ` Roberto Spadim
2011-01-31 18:44 ` Keld Jørn Simonsen
2011-01-31 20:42 ` NeilBrown
2011-01-31 21:41 ` Keld Jørn Simonsen
2011-01-31 21:43 ` Roberto Spadim
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