Bacula-users

Re: [Bacula-users] Struggling with full disk

2016-07-06 16:59:01
Subject: Re: [Bacula-users] Struggling with full disk
From: Gary Dale <garydale AT torfree DOT net>
To: bacula-users AT lists.sourceforge DOT net
Date: Wed, 6 Jul 2016 16:41:39 -0400
On 06/07/16 04:29 PM, Wanderlei Huttel wrote:
Hello

I don't know how big is your storage, but you have configured something like 100 disks of 4TB (= 4000gb)

You define capacity of your pool configuring (Maximum Volume Bytes x Maximum Volumes)

Is interesting to set smaller volumes because if you have some volume error you will loose less data.

If you consider one hard disk of 1TB with a Full Backup daily of 100GB and you want 30 days retention, you will not reach it, because 30 x 100GB = 3.000gb or 3TB, so you only will reach 10 days retention (10 * 100GB) = 1TB


That's if each backup is a full backup. Generally you don't do one that often. A full weekly backup with daily incremental backups would require far less storage.

You're right about keeping volumes small to reduce the loss due to a corrupted volume. When you're dealing with terabytes of data, it's hard to guarantee perfect reliability.
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