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[rdiff-backup-users] 1 year of rdiff-backup archives, and some questions


From: Jeff Lessem
Subject: [rdiff-backup-users] 1 year of rdiff-backup archives, and some questions
Date: Thu, 28 Aug 2003 17:38:36 -0600

As of the beginning of August, I have 1 year of daily archives of my
users' home directories using rdiff-backup.  This is about 300 users,
totaling about 100GB of space.  One year of archives is 183GB, including
the current mirror.

I want to say thanks to the many people who have made rdiff-backup,
rdiff, rsync, python, etc. such a fine solution for creating backup
archives.  It makes me look very good as the system administrator when
my answer to, "can I recover the version of this document from 3 months
ago?" is, "no problem."

Now I have some questions about maintaining this archive, and how to
store it.

Here are my goals:

- Rotate the current archive out of use, but keep it easily available for
  restoration
- Make a backup of the archive to some sort of permanent media

I would like to move the bulk of the archive out of production, and
start a new archive.  The simple way to do this is to copy the archive
off the RAID5 where it exists to a 200GB disk, and make the RAID5
available for new backups.  Then I can still recover files from the old
archive, and the RAID5, which is running low on space, is ready to go
for another year.

I am nervous about keeping the only copy of the archive on a single
disk, as disks tend to die.  What is the best way to backup 183GB of
data?  The easiest I can think of is to another 200GB disk, which sits
on a shelf.  40 DVDs or 15 DDS3 tapes sounds very annoying to deal with.
Does anybody have any other backup recommendations for easily storing
183GBs of data?

My other concern is recovering data from the old archives.  Is there a
way to keep rdiff-backup 0.10.2 and 0.12.3 both on the same machine at
the same time?  0.12.3 seems to work fine at recovering its own backups,
but has a bit of trouble with some things in 0.10.2.

--
Jeff Lessem.




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