From: Roman Mamedov <rm@romanrm.net>
To: stan@hardwarefreak.com
Cc: lilofile <lilofile@aliyun.com>, Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: 答复：md raid5 performace 6x SSD RAID5
Date: Thu, 28 Nov 2013 10:46:25 +0600 [thread overview]
Message-ID: <20131128104625.54a5fc94@natsu> (raw)
In-Reply-To: <5296C98D.8000302@hardwarefreak.com>
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On Wed, 27 Nov 2013 22:41:49 -0600
Stan Hoeppner <stan@hardwarefreak.com> wrote:
> > when the stripe_cache_size is set 4096.
...
> 2. A 4KB stripe cache is too small for 6 SSDs, try 8KB
The stripe cache size setting is specified not in KB, but in pages per disk,
so a value of 4096 on x86 systems means 4096*4096*6 = 96 MB of cache for the
whole array.
--
With respect,
Roman
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next prev parent reply other threads:[~2013-11-28 4:46 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-22 11:13 ARC-1120 and MD very sloooow Jimmy Thrasibule
2013-11-22 11:17 ` Mikael Abrahamsson
2013-11-22 20:17 ` Stan Hoeppner
2013-11-22 20:17 ` Stan Hoeppner
2013-11-25 8:56 ` Jimmy Thrasibule
2013-11-26 0:45 ` Stan Hoeppner
2013-11-26 0:45 ` Stan Hoeppner
2013-11-26 2:52 ` Dave Chinner
2013-11-26 2:52 ` Dave Chinner
2013-11-26 3:58 ` Stan Hoeppner
2013-11-26 3:58 ` Stan Hoeppner
2013-11-26 6:14 ` Dave Chinner
2013-11-26 8:03 ` Stan Hoeppner
2013-11-26 8:03 ` Stan Hoeppner
2013-11-28 15:59 ` Jimmy Thrasibule
2013-11-28 15:59 ` Jimmy Thrasibule
2013-11-28 19:59 ` Stan Hoeppner
2013-11-27 13:48 ` md raid5 performace 6x SSD RAID5 lilofile
2013-11-27 13:51 ` 答复：md " lilofile
2013-11-28 4:41 ` Stan Hoeppner
2013-11-28 4:46 ` Roman Mamedov [this message]
2013-11-28 6:24 ` Stan Hoeppner
2013-11-28 10:02 ` 答复：答复：md " lilofile
2013-11-29 2:38 ` Stan Hoeppner
2013-11-29 6:23 ` Stan Hoeppner
2013-11-30 14:12 ` 答复：答复：答复：md raid5 random " lilofile
2013-12-01 14:14 ` Stan Hoeppner
2013-12-01 16:33 ` md " lilofile
2013-12-02 2:37 ` Stan Hoeppner
2013-11-28 11:54 ` 答复：答复：md raid5 " lilofile
2013-12-02 3:48 ` md " lilofile
2013-12-02 5:51 ` Stan Hoeppner
2014-09-23 3:34 ` raid sync speed lilofile
2014-09-23 5:11 ` behind_writes lilofile
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