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Re: Block size of a cp utility
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From: |
Pádraig Brady |
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Subject: |
Re: Block size of a cp utility |
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Date: |
Wed, 01 Apr 2015 17:21:40 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 |
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.