From: Roman Mamedov <rm@romanrm.net>
To: Dallas Clement <dallas.a.clement@gmail.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: RAID 5,6 sequential writing seems slower in newer kernels
Date: Wed, 2 Dec 2015 10:22:37 +0500 [thread overview]
Message-ID: <20151202102237.2adb17d4@natsu> (raw)
In-Reply-To: <CAE9DZURyZKmnUmnn5ELAhLUq8nhXD1eBx4g8hDmCzS-MYLrT+Q@mail.gmail.com>
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On Tue, 1 Dec 2015 17:02:27 -0600
Dallas Clement <dallas.a.clement@gmail.com> wrote:
> I am frankly surprised at these results. Perhaps there is some
> configuration or tunable settings that have changed since the 2.6
> kernel that I am unaware of that affect RAID 5, 6 performance. Please
> comment if you have any ideas which might explain what I am seeing.
Do you use a write intent bitmap (internal?), what is your bitmap chunk size?
What is your stripe_cache_size set to?
--
With respect,
Roman
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next prev parent reply other threads:[~2015-12-02 5:22 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-01 23:02 RAID 5,6 sequential writing seems slower in newer kernels Dallas Clement
2015-12-02 1:07 ` keld
2015-12-02 14:18 ` Robert Kierski
2015-12-02 14:45 ` Phil Turmel
2015-12-02 15:28 ` Robert Kierski
2015-12-02 15:37 ` Phil Turmel
2015-12-02 15:44 ` Robert Kierski
2015-12-02 15:51 ` Phil Turmel
2015-12-02 19:50 ` Dallas Clement
2015-12-03 0:12 ` Dallas Clement
2015-12-03 2:18 ` Phil Turmel
2015-12-03 2:24 ` Dallas Clement
2015-12-03 2:33 ` Dallas Clement
2015-12-03 2:38 ` Phil Turmel
2015-12-03 2:51 ` Dallas Clement
2015-12-03 4:30 ` Phil Turmel
2015-12-03 4:49 ` Dallas Clement
2015-12-03 13:43 ` Robert Kierski
2015-12-03 14:37 ` Phil Turmel
2015-12-03 2:34 ` Phil Turmel
2015-12-03 14:19 ` Robert Kierski
2015-12-03 14:39 ` Dallas Clement
2015-12-03 15:04 ` Phil Turmel
2015-12-03 22:21 ` Weedy
2015-12-04 13:40 ` Robert Kierski
2015-12-04 16:08 ` Dallas Clement
2015-12-07 14:29 ` Robert Kierski
2015-12-08 19:38 ` Dallas Clement
2015-12-08 21:24 ` Robert Kierski
2015-12-04 18:51 ` Shaohua Li
2015-12-05 1:38 ` Dallas Clement
2015-12-07 14:18 ` Robert Kierski
2015-12-02 15:37 ` Robert Kierski
2015-12-02 5:22 ` Roman Mamedov [this message]
2015-12-02 14:15 ` Robert Kierski
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