From: John Robinson <john.robinson@yuiop.co.uk>
To: David Brown <david.brown@hesbynett.no>
Cc: GuoZhong Han <hanguozhong@meganovo.com>,
stan@hardwarefreak.com, linux-raid@vger.kernel.org
Subject: Re: make filesystem failed while the capacity of raid5 is big than 16TB
Date: Thu, 13 Sep 2012 08:43:17 +0100 [thread overview]
Message-ID: <50518E95.5050104@yuiop.co.uk> (raw)
In-Reply-To: <50518BA4.6090503@hesbynett.no>
On 13/09/2012 08:30, David Brown wrote:
[...]
> Using 2 x 8-disk raid6 connected by
> raid0 (or linear concat for XFS) will be faster and safer than a single
> large raid5/6 array, but unless you use the latest multithreaded raid
> kernel then it will still be very slow.
Not as far as I understand it, it won't. The multithreaded code is only
really a benefit on SSDs which can manage tens of thousands of IOPS,
while on spinning rust HDDs which can only manage hundreds of IOPS, the
single-threaded code is fine.
Cheers,
John.
--
John Robinson, yuiop IT services
0131 557 9577 / 07771 784 058
46/12 Broughton Road, Edinburgh EH7 4EE
next prev parent reply other threads:[~2012-09-13 7:43 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-12 7:04 make filesystem failed while the capacity of raid5 is big than 16TB vincent
2012-09-12 7:32 ` Jack Wang
2012-09-12 7:37 ` Chris Dunlop
2012-09-12 7:58 ` David Brown
[not found] ` <CACY-59cLmV2SRY+FrvhHxseDD1+r-B-3bOKPGzJdGttW+9U2mw@mail.gmail.com>
2012-09-12 9:46 ` David Brown
2012-09-12 14:13 ` Stan Hoeppner
2012-09-13 7:06 ` David Brown
2012-09-13 3:21 ` GuoZhong Han
2012-09-13 3:34 ` Mathias Buren
2012-09-13 7:13 ` David Brown
2012-09-13 7:30 ` David Brown
2012-09-13 7:43 ` John Robinson [this message]
2012-09-13 9:15 ` David Brown
2012-09-13 13:25 ` Stan Hoeppner
2012-09-13 13:52 ` David Brown
2012-09-13 22:47 ` Stan Hoeppner
2012-09-18 9:35 ` GuoZhong Han
2012-09-18 10:22 ` David Brown
2012-09-18 21:38 ` Stan Hoeppner
2012-09-19 7:20 ` David Brown
2012-09-19 16:00 ` Stan Hoeppner
2012-09-18 21:20 ` Stan Hoeppner
2012-09-18 21:20 ` Stan Hoeppner
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