Bacula-users

[Bacula-users] How to do multiplexing?

2010-09-30 11:40:24
Subject: [Bacula-users] How to do multiplexing?
From: David Noriega <tsk133 AT my.utsa DOT edu>
To: bacula-users AT lists.sourceforge DOT net
Date: Thu, 30 Sep 2010 10:37:16 -0500
I come from using Symatanic's NetBackup software, so if my vocabulary
or concepts are off or incompatible with Bacula, please let me know.

Here is the scenario: A file server hosting home directories needs to
be backed up regularly and quickly. Approx 10Tb.

A simple full backup of /home would just take too long because it was
in essence a single file stream to a single tape drive. On the old
system using NetBackup, I configured it so 1) The backup job of /home
was separated into multiple streams(ie /home/[a-e], /home/[f-j], etc)
and 2) the streams were sent to two tape drives. This showed a
significant improvement in how long it took to complete the backup.

So I was wondering how can I do the same with Bacula. I've read it
supports multiplexing, which is the same term used in NetBackup's
documentation, so its my assumption that they are similar. Also as a
sort of wish list item, it would be nice if there was a way to 'load
balance' each stream. In my example above, they were separated simply
by using their first letter, this leads to some streams finishing more
quickly then others. Any experience in spreading the load equally?

Thanks
David

-- 
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we didn't have to produce anything! You've never been out of college!
You don't know what it's like out there! I've worked in the private
sector. They expect results. -Ray Ghostbusters

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