rsync speed limited by read chunk size?

[AZ 9901]

Le 13 juil. 2013 à 14:42, AZ 9901 a écrit :

> Le 12 juil. 2013 à 19:35, Wayne Davison <wayned at samba.org> a écrit :
> 
>> On Tue, Jul 9, 2013 at 9:46 AM, CM Fields <cmfileds at gmail.com> wrote:
>> Is rsync speed limited to 160MB/sec read speeds due to the chunk read size? Or, are we seeing just a coincidence and the limitation is somewhere else?
>> 
>> The fileio routines are usually reading 256K chunks except for the receiver, which tries to read 16K chunks (since it may be randomly accessing the file data in some cases).
>> 
>> Give the 3.1.0dev code a try -- it aligns its reads on 1K boundaries.  That might help the speed.  It also has better I/O throughput between processes.
> 
> Hi Wayne,
> 
> Why don't you choose 4K boundaries alignment, as new hard drives now come with 4K physical blocks ?
> It would also be still compatible with disks using 512B blocks (4096/512=8).

Hello Wayne,

What about my 4K alignment question ?
Don't you think it would even be faster ?

Thank you very much !

Best regards,

Ben


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.samba.org/pipermail/rsync/attachments/20130728/64313d3d/attachment.html>