[Wlug] Image/Backup tools

[Eric Stein]

There are many applications for doing backups, most of which have strong 
and weak points. I use 3 systems:

    * Homemade shell script that tgzs the entire backup set into a dated
      file, encrypts it with gpg, and transfers it to the backup server.
          o Strong points
               1. Secure - no need to trust foreign server
               2. High redundancy of data
          o Weak points
               1. Bandwidth intensive (only good for small data sets)
               2. Heavy on CPU usage
               3. Uses a lot of disk space
    * Rsync
          o Strong points
               1. Space efficient on the backup server
               2. Bandwidth efficient
               3. Fast
          o Weak points
               1. No revisions; undetected data loss will be propagated
                  to the backup server
    * rdiff-backup
          o Strong points
               1. Bandwidth efficient
               2. Has revisions and stores diffs compressed
               3. Somewhat space efficient because of the compressed diffs
          o Weak points
               1. Uses more space on the backup server than Rsync

I use Rsync for mirroring my less important data, and rdiff-backup for 
my important files. All of these methods can be scheduled with cron.

Eric

Michael Zarozinski wrote:
> Hi all,
>
> I'm looking for recommendations for backup/imaging tools. We have 2 
> servers runing RHEL4, one is a production server and the other a 
> development server.
>
> We were recently hit with a DOS attack and possibly a root kit attack. 
> It's been a long task re-installing all the software/tweaks we've made 
> so I'm looking for something to ease this process if it happens in the 
> future.
>
> Thanks in advance,
>
> Michael Z
>
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