1. Disk-to-Disk Backups with Rsync Robert Tuck robtuck@cs.rutgers.edu

2. Cost of disk backup is quickly approaching cost of tape backup Easy Automated Snapshot-Style Backups with Linux and Rsync http://www.mikerubel.org/computers/rsync_snapshots/ Background

3. Eliminate tape backups Easy setup for clients No additional users Rsync is only software necessary * Backup configs on client Centralized backups Our Goals

4. Backup Mechanics Filesystem Storage BackUp ServerBackUp Client File …01001110011011000110… {backup directory}{root} yesterdaytodaytomorrow BestOS.txt etc BestOS.txt File BestOS.txt etc Yes! etc BestOS.txt Equal? File’ Equal? No! File’

5. What’s out there? Rsnapshot (rsnapshot.org) local rsync, rsync over ssh, rsync server Simple centralized configuration of all backups Snapback2 (http://www.perusion.com/misc/Snapback2/) local rsync, rsync over ssh Feature-rich, centralized configuration of all backups

6. What we do Backup organization structure Rsync “secrets” for login Client backup configuration is controlled by the client system administrator Rsync daemon on client

7. / backup directory/ client name/ backup name/ structure(s) Name of the backup client Date format : yymmdd.hhmm Backup structures relative to client root Organization of Backups

8. Backup Server Client Exports Rsync “Secrets” directoryRuns rsync daemon Server initiates backup Generates rsync “secrets” Gets configuration from client with rsync Parses configuration and starts backup Destroys “secrets” Backup Overview

9. Future? Windows Improved restore mechanism Off-site backup server More Info http://www.cs.rutgers.edu/lcsr/projects/rsync_backup http://rsync.samba.org http://www.mikerubel.org/computers/rsync_snapshots/