Re: Backup of large disk arrays with AMANDA?????

[Gerhard den Hollander]

* Hartmann, O. <[EMAIL PROTECTED]> (Mon, Apr 23, 2001 at 10:48:00AM 
+0200)

> Well, I would like to ask for some hints or simply a fact-statement:
> Is AMANDA capable of spreading a large volume over several tapes with gtar
> like gtar does this using the multivolume mechanism? How to configure

No
(or Not yet, take your pick)

> this ability if possible? Please be aware of the following fact:
> I definitely can not split this array into smaller pieces because
> it is not possible to split them due the high data fluctuation.

I have the same porblem (a 450G diskarray)
I use gtar to split the disk in smaller pieces.
I still have one 450G partition, but I have a whole slew of toplevel
directories, and simply specify each of them as a target for tar.
(some of those are too big even then, so I repeat the trick for the second
level dirs).

And yes, this sometimes mean I have to add or remove some entries from
disklist. I can live with that ;).

My disklist looks something like
host/bigdisk/a  high-tar
host/bigdisk/b  high-tar
host/bigdisk/c  high-tar
host/bigdisk/d  high-tar
host/bigdisk/e  high-tar
host/bigdisk/e/1high-tar
host/bigdisk/e/2high-tar
host/bigdisk/e/3high-tar
host/bigdisk/e/4high-tar
host/bigdisk/e/5high-tar
host/bigdisk/f  high-tar
host/bigdisk/g  high-tar

&c &c ..

(where a..g are replaced with the names of my toplevel dirs and
 1..5 replaced with the secondlevel dirs .. you get the picture)

Kind regards,
 --
Gerhard den Hollander   Phone +31-10.280.1515
Technical Support Jason Geosystems BV   Fax   +31-10.280.1511
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Backup of large disk arrays with AMANDA?????

[Hartmann, O.]

Dear Sirs.

I run into problems with AMANDA backing up a large disk array (250 GB).
I use 'gnutar' as dumping tool defined by GTAR within amanda in the hope
that AMANDA is capable to spread a big backup image over several tapes
like TAR does this when used without AMANDA (multi volume facility).

I asked about AMANDA's capabilty of backing up large arrays before and I
was told to split the big array into smaller pieces. It seems to me, by
the way, that AMANDA is only capable of backing up arrays or drive areas
they are about the size of one tape. We use a tape changer with 6 slots
of DDS-4 cardridges. But the suggestion splitting up the big array into
pieces is impossible! The only way I could do is to order users in
alphabetical order and save them splitted (the big array is the HOMES
partition of our institute). But several users have enormous data fluctuations,
today I run into problems with the daily backup due the fact one of the
users load scientific data of about 30 GB - that is to much for one tape
and since 8 hours amanda is trying to back up this area trying each tape,
filling it up to its limits, then makes an error and take the next tape -
a silly behaviour.

Well, I would like to ask for some hints or simply a fact-statement:
Is AMANDA capable of spreading a large volume over several tapes with gtar
like gtar does this using the multivolume mechanism? How to configure
this ability if possible? Please be aware of the following fact:
I definitely can not split this array into smaller pieces because
it is not possible to split them due the high data fluctuation.

Thank you in adavnce,
Oliver

--
MfG
O. Hartmann

[EMAIL PROTECTED]

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