rsync advice

[Michael]

Glad you remembered why I added --delete-before . I forgot.

On Tue, Feb 2, 2016 at 1:37 PM, Brian Cluff <brian at snaptek.com> wrote:

> If I remember right, you added the --delete-before option because you were
> backing up to a flash drive and without deleting deleted files prior to
> starting the copy you were running out of space causing your backup to fail.
>
> The only real difference that you will see between delete-before and
> delete-during is where rsync has to do a complete read through the whole
> file structure.  If you are using delete-before, rsync HAS to read through
> the whole file structure so that it can determine which files to delete
> before it starts it's copy.  If you use --delete-during, which I believe is
> the default, rsync CAN, depending on other options, start copying right
> away.  That can be a huge time saver.  On some of the systems I backup were
> are so any files that it can take a half hour before the copy even starts
> if rsync can't start copying immediately.
> My guess would be that on your system with a single user being backed up
> that using --delete-before doesn't cause much more than a few seconds extra
> to pass before the copy starts.
> If you're no longer using a flash drive to backup and have plenty of space
> now, you might as well take the --delete-before off and leave rsync to it's
> default behavior.
>
> Brian Cluff
>
>
> On 02/02/2016 05:59 AM, Michael wrote:
>
>> I run this command:
>>
>> rsync -aWuq --delete-before /home/bmike1/Documents
>> /media/bmike1/RedSanDisk
>>
>> I was wondering about the --delete-before and was thinking it should be
>> --delete-during and was hoping to get all of your opinions on the matter.
>> --
>> :-)~MIKE~(-:
>>
>>
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-- 
:-)~MIKE~(-:
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