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Re: Block size of a cp utility


From: Ramaseshan
Subject: Re: Block size of a cp utility
Date: Thu, 02 Apr 2015 18:29:14 +0530
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0

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Hi Padraig,
Thanks for the response.
It did help me a lot. thanks for you and the GNU Team for the great
work :)

On 01/04/2015 21:51, Pádraig Brady wrote:
> On 01/04/15 14:49, Ramaseshan wrote:
>> Hi GNU team, Just wanted to check, when we copy a file using the
>> cp utility, what block size does it use to copy a file. I am also
>> looking around and reading the archives, but if anybody could 
>> respond it would be great.
> 
> It has been creeping up over time:
> 
> 8 -> 32K
> http://git.sv.gnu.org/gitweb/?p=coreutils.git;a=commitdiff;h=v7.1-44-g55efc5f
>
> 
32 -> 64K
http://git.sv.gnu.org/gitweb/?p=coreutils.git;a=commitdiff;h=v8.16-33-ga18ba2f
> 64 - 128K
> http://git.sv.gnu.org/gitweb/?p=coreutils.git;a=commitdiff;h=v8.22-103-g74ca6e8
>
>  You can check your version like:
> 
> strace -e read,write cp /bin/cp /dev/null
> 
> cheers, Pádraig.
> 
> 

- -- 
*Ramaseshan S*
Software Engineer
Fractalio Data
Mobile : +919916394958
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