[sorry about that half-a-reply, folks; clumsy fingers...]
On Fri, Mar 26, 2004 at 04:04:05PM +0100, BRINER Cedric wrote:
> + These dumps were to tape WeeklySet076.
> + *** A TAPE ERROR OCCURRED: [[writing file: short write]].
>
> so the tape have for example 45Gb already on it, when it tries to flush the
> 30Gb. So I end up that:
> the 30Gb is not flushed
> the others dumps (40 dumps of 1Gb) are not dump to the tape. When a lot of
> them could be dumped
>
> So:
> -is amanda able to maximise the amount on data that it stores or does it only
> flush without any algorithm.
There are a number of algorithms it can use. See the description
of "taperalgo" in amanda(8).
> -or Is there a way to breaks into smaller pieces the big dumps
It's not yet possible to split a single DLE across multiple
tapes. John Stange (and others?) are working on it (hooray!), so
stay tuned.
You can, however, split one DLE into a number of smaller DLEs, by
using gnutar instead of dump, and using "exclude" and "include"
directives for each one. There are a couple of disadvantages to
this:
- if your clients have non-standard metadata, gnutar might not
be able to back it up
- the file-access times get munged by your backup procedure
- gnutar can be slower at some things than dump is, especially
at getting estimates
These (especially the second), plus lack of pressing need, are
enough to keep me from using this approach myself, but a lot of
people here swear by it.
> the tapes are 70Gb
> [...]
> my config file for the tape configuration
>
> define tapetype DLT4000 {
> length 40000 mbytes # 40 Gig tapes
> filemark 8 kbytes # 16 also works, 32 doesn't
> speed 1536 kbytes # 6 Mb/s accd to Compaq ??? see bellow def
> of DLT
> }
I've never worked with DLT drives, but judging by the specs, I
think there's some confusion here.
http://www.quantum.com/am/products/dlt/dlt4000/specifications.htm
says that DLT 4000 is 20 GB native, and 40 GB (estimated) with
hardware compression taken into account. So if you in fact have
a DLT 4000, I don't think the "70 GB" is realistic at all, and
even 40 GB is a bit dubious.
--
| | /\
|-_|/ > Eric Siegerman, Toronto, Ont. erics AT telepres DOT com
| | /
It must be said that they would have sounded better if the singer
wouldn't throw his fellow band members to the ground and toss the
drum kit around during songs.
- Patrick Lenneau
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