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Alastair D'Silva | 1 Feb 2008 01:28
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[clug] Tape backups

Hi folks,

I am currently reviewing our tape backup system, and am looking for a
system that can do the following:

1. Span multiple tapes
2. Support compression/encryption program (preferably in parallel, we
have a lot of CPU cores available)
3. Compress/encrypt on a per-file basis (minimise data loss with bad
blocks on a tape)
4. Run in a reasonable amount of time

GNU tar is out, as it can't compress multi-tape archives.

We are currently evaluating afio, but are running into trouble with
excessively long backup times.

Any suggestions regarding backup software that suits our needs?

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Sam Couter | 1 Feb 2008 09:43
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Re: [clug] Tape backups

Alastair D'Silva <alastair@...> wrote:
> I am currently reviewing our tape backup system, and am looking for a
> system that can do the following:
> 
> 1. Span multiple tapes
> 2. Support compression/encryption program (preferably in parallel, we
> have a lot of CPU cores available)
> 3. Compress/encrypt on a per-file basis (minimise data loss with bad
> blocks on a tape)
> 4. Run in a reasonable amount of time

Amanda can do all of that (if you have a tape changer). I think. The only
bit I'm unsure about is parallel compression/encryption. Amanda can use
arbitrary compression/encryption programs, so making it compress/encrypt
on a file-by-file basis is all up to you.

I think you might be able to wrestle Bacula into doing all of that too.
It's fairly flexible.
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Gary Woodman | 1 Feb 2008 11:48
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Re: [clug] Tape backups

--- Sam Couter <sam@...> wrote:

> Alastair D'Silva <alastair@...> wrote:
> > I am currently reviewing our tape backup system, and am looking for
> a
> > system that can do the following:
> > 
> > 1. Span multiple tapes
> > 2. Support compression/encryption program (preferably in parallel,
> we
> > have a lot of CPU cores available)
> > 3. Compress/encrypt on a per-file basis (minimise data loss with
> bad
> > blocks on a tape)
> > 4. Run in a reasonable amount of time
> 
> Amanda can do all of that (if you have a tape changer). I think.

I could vote for Amanda, but I'm not sure about the
compression/encryption, we're not doing that. Performance is a bit
underwhelming too, it takes 3 weeks to back up ~10Tb (manual tape
changer, only one per day). But I suppose you're aware, performance is
a hardware problem :-P

Gary

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Jsparksaa | 1 Feb 2008 05:40

RE: [clug] Tape backups

Alastair,

  I have used Microlite BackupEdge for many years on AIX / RS-6000 & DLT tape drive.  My archives do not
currently span volumes.  Edge supports tape changers. I backup and verify 13 GB in less than an hour.  When I
upgraged a license that was more than 5 years old, it cost about $100 US and that was about 4 years ago.

  http://www.microlite.com/

Jim

"Alastair D'Silva" <alastair@...> wrote:

>Hi folks,
>
>I am currently reviewing our tape backup system, and am looking for a
>system that can do the following:
>
>1. Span multiple tapes
>2. Support compression/encryption program (preferably in parallel, we
>have a lot of CPU cores available)
>3. Compress/encrypt on a per-file basis (minimise data loss with bad
>blocks on a tape)
>4. Run in a reasonable amount of time
>
>GNU tar is out, as it can't compress multi-tape archives.
>
>We are currently evaluating afio, but are running into trouble with
>excessively long backup times.
>
>Any suggestions regarding backup software that suits our needs?
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Brett Worth | 1 Feb 2008 09:39
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Re: [clug] Tape backups

Alastair D'Silva wrote:
> Any suggestions regarding backup software that suits our needs?

Bacula's been working well for me at work for a couple of years writing to an LTO2 tape
drive.  Certainly handles multi-volume backups.

The interface gets a little getting used to.  Very functional though.  If you have a
changer it will use mtx to switch tapes.

http://www.bacula.org

Brett

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