Re: rsync

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Author: Michael Havens
Date:  
To: Main PLUG discussion list
Subject: Re: rsync
what about the -q option and the --delete option? i noticed that you didn't
use them in your command 'rsync -auW /sort/directory /dest/directory/'.

On Sun, Sep 20, 2015 at 10:34 PM, Brian Cluff <> wrote:

> If you are backing up locally you will want to do things a little
> different size as:
>
> rsync -auW /sort/directory /dest/directory/
>
> You will want to skip the -z option and the corresponding --compress-level
> option. Since you are doing copying everything locally that will only
> cause the machine to compress and immediately decompress every file that is
> copied wasting a ton of CPU/power.
>
> The other thing you will want to do is use the -W flag, that tells the
> machine to copy whole files instead of looking for what has changed between
> the documents. That way it can look at the time and/or size and if it's
> changed it will just copy the whole file. Without that flag it would read
> through both the source and destination file and then just copy the
> differences by writing a whole new file, so with the -W (whole file) flag
> the machine just reads/writes the file once and is a lot more
> efficient/faster.
>
> This can also be a good flag to set on fast networks since it can be a lot
> faster just to re-copy the whole file than it is to have the hard drive
> reading the file multiple times.
>
> The progress flag is very nice, but unless you are planning on closely
> monitoring your copy, I would skip it as I've found that it tends to slow
> down the transfer... or at least make it feel that way, like a watched pot
> never boils :)
>
> On your slash at end end question. A slash at the end tends to mean that
> you want to put the source files/dirs into that directory and a destination
> without a slash usually means that you want to rename your source
> file/directory to that destination file/dir name.
>
> Lastly the -h option gives you the sizes in easily readable terms or in
> other words, instead of just giving you the size in bytes it will give you
> size that look like 100K 2.4M 1.8G
>
> Brian Cluff
>
>
> On 09/20/2015 05:34 AM, Michael Havens wrote:
>
>> I know how to use rsync (sorta) to backup a disk and go between remote
>> machines. With my current incarnation of the os I'm not so worried about
>> backing up the whole system as I am a directory (and all of the
>> directories under it) nor copying between remote machines. The directory
>> is the 'Documents' directory. Would I:
>>
>> rsync -aquz --compress-level=5 /home/bmike1/Documents /media/bmike1/USB
>> DISK/
>> --
>> :-)~MIKE~(-:
>>
>>
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