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Re: Backup strategy sanity check

From: Thomas Harold <thomas-lists_at_nybeta.com>
Date: Wed, 24 Jul 2013 15:22:11 -0400

On 7/24/2013 2:59 PM, Andy Levy wrote:
> I'm planning my upgrade to SVN 1.8 & to go along with it, setting up a
> new backup process. Here's what I'm thinking:
> * Monday overnight, take a full backup (svnadmin hotcopy, then
> compress the result for storage)
> * Tuesday through Sunday overnights, incremental backups (svnadmin
> dump --incremental, compress the result)
> * After completing the Monday night full backup, purge the previous
> week's incrementals.
> * After completing the Monday night full backup, run svnadmin pack
> * Keep the last 6 full backups on local disk (these will be kept
> written to the corporate backup system, so we can go back further if
> needed).

We simply do "svnadmin hotcopy" each night, then rdiff-backup that to
another server over the network. The rdiff-backups keep 6 months of
revisions to the hotcopy folders. Our /var/svn is 122GB (as is the
hotcopy location), the rdiff-backup is 173GB. Using rdiff-backup means
that I can go back to any point in time in the last 6 months for a
particular repository (plus we have hashes/checksums of all files).

For offsite purposes, we backup the rdiff-backup directory instead of
the hotcopy directory.

What we might do once 1.8 server is stable is switch to doing the new
"incremental" style hotcopy on Mon-Sat evenings and do a full hotcopy on
Sun. Right now, we address the time it takes to do full hotcopy of all
300+ repositories by only doing a nightly hotcopy of any repositories
that have changes within the last N days (usually 7 days, and usually a
only a few dozen repositories see activity each week). Doing the
hotcopy to a different set of platters also helps.

This is based on the assumption that "svnadmin hotcopy" is a preferred
backup method over "svnadmin dump" for daily backups, because it grabs
everything out of the repository directory while "svnadmin dump" misses
things like scripts.
Received on 2013-07-24 21:22:49 CEST

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