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From: Eric Sandeen <sandeen@sandeen.net>
To: yy <yy@xspring.net>, xfs <xfs@oss.sgi.com>
Subject: Re: XFS buffer IO performance is very poor
Date: Wed, 11 Feb 2015 10:08:16 -0600	[thread overview]
Message-ID: <54DB7E70.3060709@sandeen.net> (raw)
In-Reply-To: <tencent_39AFE52BC5E06F89B6B2B3ED@qq.com>

On 2/11/15 1:39 AM, yy wrote:

<snip>

(In addition to Brian's questions):

> XFS format parametes:
> 
> #mkfs.xfs -d su=256k,sw=5 /dev/sdb1
> 
> #cat /proc/mounts
> 
> /dev/sdb1 /data1 xfs rw,noatime,attr2,delaylog,nobarrier,logbsize=256k,sunit=512,swidth=2560,noquota 0 0
> 
> #fdisk -ul
> Device Boot      Start         End      Blocks   Id  System
> /dev/sdb1             128  2929356359  1464678116   83  Linux

so 128*512 = 64k; your partition doesn't start on a 256k stripe unit boundary,
right?  Shouldn't it do so?

-Eric

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  parent reply	other threads:[~2015-02-11 16:08 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-11  7:39 XFS buffer IO performance is very poor yy
2015-02-11 13:35 ` Brian Foster
2015-02-11 16:08 ` Eric Sandeen [this message]
  -- strict thread matches above, loose matches on Subject: below --
2015-02-12  5:30 yy
2015-02-12  6:59 yy
2015-02-12 21:04 ` Dave Chinner
2015-02-13  2:20 yy
2015-02-13 13:46 ` Carlos Maiolino

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