BackupPC-users

Re: [BackupPC-users] tar on localhost (and shell escaping)

2010-11-12 11:07:53
Subject: Re: [BackupPC-users] tar on localhost (and shell escaping)
From: John Rouillard <rouilj-backuppc AT renesys DOT com>
To: "General list for user discussion, questions and support" <backuppc-users AT lists.sourceforge DOT net>
Date: Fri, 12 Nov 2010 16:04:33 +0000
On Fri, Nov 12, 2010 at 08:11:32AM +0000, Tyler J. Wagner wrote:
> If you've already got SSH and rsync installed, you'll always get better
> results with rsync than with tar.

That's not always true. On large files with lots of changes rsync can
bog down and you will get backups that take less time with tar (by 50%
or better is some cases) and you also use less cpu. However you do get
more bytes transferred over the network.

If the host you are backing up doesn't have a lot of spare cycles, tar
is also faster becuase of the reduced compute (and sometimes memory)
load. So it's a trade off and you can't just make a blanket statement.

-- 
                                -- rouilj

John Rouillard       System Administrator
Renesys Corporation  603-244-9084 (cell)  603-643-9300 x 111

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