linux-ext4 - Re: [PATCH v4 0/15] ext4: add new online resize interface

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Message-Id: <906726DA-EC86-40CB-AB3E-7F3871609BF3@dilger.ca>
Date:	Sun, 20 Nov 2011 10:15:12 -0700
From:	Andreas Dilger <adilger@...ger.ca>
To:	Yongqiang Yang <xiaoqiangnk@...il.com>
Cc:	"tytso@....edu" <tytso@....edu>,
	"adilger@...ger.ca" <adilger@...ger.ca>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH v4 0/15] ext4: add new online resize interface

On 2011-11-19, at 20:14, Yongqiang Yang <xiaoqiangnk@...il.com> wrote:

> On Sun, Nov 20, 2011 at 2:13 AM, Andreas Dilger <aedilger@...il.com> wrote:
>> On 2011-11-19, at 2:57, Yongqiang Yang <xiaoqiangnk@...il.com> wrote:
>>> 
>>>   Below are benchmarks I made on my personal computer, fses with
>>>   flex_bg size = 16 were resized to 230GB evry time. The first
>>>   row shows the size of a fs from which the fs was resized to 230GB.
>>>   The datas were collected by 'time resize2fs'.
>>> 
>>>                      new resize
>>>                20GB          50GB      100GB
>>>      real    0m3.558s     0m2.891s    0m0.394s
>>>      user    0m0.004s     0m0.000s    0m0.394s
>>>      sys     0m0.048s     0m0.048s    0m0.028s
>>> 
>>>                      current resize
>>>                20GB          50GB      100GB
>>>      real    5m2.770s     4m43.757s  3m14.840s
>>>      user    0m0.040s     0m0.032s   0m0.024s
>>>      sys     0m0.464s     0m0.432s   0m0.324s
>> 
>> These stats must be backward, because resizing 20GB takes more time than resizing 100GB.
> 
> Every time, the filesystem was resized from 20/50/100GB to 230GB, so
> resizing 20GB should takes more time than resizing 100GB.   I am not
> sure what you meant.

Sorry, I didn't read closely enough. I thought it was resizing by the given amount. 

Cheers, Andreas--
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