rsync taking a while on really large files
leen at consolejunky.net
leen at consolejunky.net
Fri Jan 15 11:57:07 MST 2010
On 01/15/2010 07:46 PM, David Trammell wrote:
> I could use an ordinary copying script for the mail files, but I
> figured if rsync can do it in some more optimal way, I'll stick with
> it for simplicity (since it's working great for the several hundred
> gigs of user files).
>
> I saw the -W option, but I wasn't sure about how it behaves as the man
> pages don't have many details, and I thought there might be other
> options I missed. For -W the man page just says "copy files whole
> (w/o delta-xfer algorithm)"
>
> Does that mean it will copy all files with no comparison, or does it
> at least verify that there is some change to the file first? I
> suppose either way I can test it to see, which is faster, but if
> someone can clarify the behavior I'd appreciate it.
>
> Thanks,
> David
>
Without -W set it will check for file date/time and I think size.
>
> ----- Original Message ----- From: <leen at consolejunky.net>
> To: <rsync at lists.samba.org>
> Sent: Friday, January 15, 2010 12:40 PM
> Subject: Re: rsync taking a while on really large files
>
>
>> On 01/15/2010 07:22 PM, David Trammell wrote:
>>> Can anyone suggest a good way to speed up rsync on really large
>>> files? In particular, when I rsync the mail spool directory, I have
>>> a few users with inboxes over 1GB and up and it seems to take a very
>>> long time to just compare the files. Maybe it would be faster to
>>> copy from scratch for files over a certain size or something if the
>>> time stamps don't match.
>>>
>>> David
>>>
>>>
>> rsync is meant to safe bandwidth, that's the main use of the tool. If
>> you have enough bandwidth, rsync without options might not be how you
>> want to use it.
>>
>> Their is -W for whole files.
>>
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