Michael D. Schleif said:
> [1] Should I use hardware compression?
>
> There seem to be several schools of thought here. I want to know
> how
> Amanda works with hardware compression? What are the advantages of
> using software compression? What are the disadvantages of using
> *both*
> hardware
.
If you don't believe me, try to zip a gzip file. See if it gets any smaller.
> -Original Message-
> From: Kurt Yoder [mailto:[EMAIL PROTECTED]
> Sent: Thursday, July 03, 2003 11:57 AM
> To: Michael D. Schleif
> Cc: amanda mailing list
> Subject: Re: to compress or
On Thu, 3 Jul 2003 at 12:17pm, Ean Kingston wrote
> I Have the opposite viewpoint. I prefer hardware compression. It allows
> me to offload processing required to the tape drive (instead of my
> computers) Since some of my systems (including the backup server itself)
> can be slow, this actuall
Michael D. Schleif wrote:
[1] Should I use hardware compression?
There seem to be several schools of thought here. I want to know how
Amanda works with hardware compression? What are the advantages of
using software compression? What are the disadvantages of using *both*
hardware and software c
On Thu, Jul 03, 2003 at 11:57:22AM -0400, Kurt Yoder wrote:
> I prefer software compression personally:
>
> -Amanda can make a more accurate estimate of how much tape is
> needed. So if you know your tape is 20 GB, and your
> software-compressed dump files total 21 GB, you know they won't all
> f
On Thu, Jul 03, 2003 at 12:17:16PM -0400, Ean Kingston wrote:
> Also, with hardware compression, I know I can restore the tape without having
> to worry about finding the right libraries and programs to do the restore.
True. But one can work around that by backing up / uncompressed,
and making su
On Thu, Jul 03, 2003 at 02:18:26PM -0400, Eric Siegerman wrote:
>
> - Better compression, probably. Hardware compression is
> typically some variant of LZ, isn't it? I don't know how
> gzip -1 (the default "compress-fast") compares with that, but
> gzip -9 (the default "compress-best") doe
On Thursday 03 July 2003 11:42, Michael D. Schleif wrote:
>Yes, I am learning -- at the expense of many questions ;>
>
>First, a brief overview:
>
>I have five (5) Linux servers, totaling ~50 Gb used diskspace,
> divided roughly even across all five.
>
>I have several DAT tape drives, the largest o
Also sprach Gene Heskett (Thu 03 Jul 02003 at 02:51:39PM -0400):
> On Thursday 03 July 2003 11:42, Michael D. Schleif wrote:
> >Yes, I am learning -- at the expense of many questions ;>
> >
> >First, a brief overview:
> >
> >I have five (5) Linux servers, totaling ~50 Gb used diskspace,
> > divided
>True. But one can work around that by backing up / uncompressed,
>and making sure it contains a (possibly statically linked) copy
>of gzip.
... or just write a couple of copies of a CD with gzip and whatever else
you might need.
Assuming you're running Linux, all you need is some form of Linux
rescue disk. I've got a bunch of Debian installer cd's lying around
and have used them for similar purposes before. Probably most Linux
installer cd's can be used like this, and I'm quite certain
something like Knoppix would include
Michael D. Schleif said:
> Also, what is the best way to turn off compression?
>
> # sudo mt-gnu -f /dev/nst0 datcompression
> Compression on.
> Compression capable.
> Decompression capable.
>
> # sudo mt-gnu -f /dev/nst0 datcompression 0
> Compression off.
> Compressio
restoring w/o amrestore can be done with dd, gzip, tar, and so on, way
messy compared to amrecover (or amrestore) but its possible. That's one
of the plus's to amanda.
Kurt Yoder wrote:
>
> Assuming you're running Linux, all you need is some form of Linux
> rescue disk. I've got a bunch of Debia
On Thu, 3 Jul 2003 at 4:34pm, Kurt Yoder wrote
> Assuming you're running Linux, all you need is some form of Linux
> rescue disk. I've got a bunch of Debian installer cd's lying around
> and have used them for similar purposes before. Probably most Linux
> installer cd's can be used like this, and
How do you recover an amanda dump file without amrestore? I had dd'd
one to disk and tried to untar it but got the message "not a tar
file". Once I ran it through amrestore I was able to untar it
though.
George Kelbley said:
> restoring w/o amrestore can be done with dd, gzip, tar, and so on,
> wa
Also sprach George Kelbley (Thu 03 Jul 02003 at 02:41:12PM -0600):
> restoring w/o amrestore can be done with dd, gzip, tar, and so on, way
> messy compared to amrecover (or amrestore) but its possible. That's one
> of the plus's to amanda.
>
> Kurt Yoder wrote:
> >
> > Assuming you're running L
On Thu, 3 Jul 2003 at 4:20pm, Michael D. Schleif wrote
> Am I right that amrecover is useless *without* an index?
Yep.
> Also, using only amrestore, is it possible to get at individual
> files/directories, or is it only a matter of restoring the entire
> dump/tarball?
Yes, depending. If you us
Joshua Baker-LePain wrote:
On Thu, 3 Jul 2003 at 4:20pm, Michael D. Schleif wrote
Am I right that amrecover is useless *without* an index?
Yep.
No argument about it.
But, I don't keep index files along with the backup image on tape.
Before running amrecover,
I would run a script to
Also sprach Joshua Baker-LePain (Thu 03 Jul 02003 at 05:41:32PM -0400):
> On Thu, 3 Jul 2003 at 4:20pm, Michael D. Schleif wrote
>
> > Am I right that amrecover is useless *without* an index?
>
> Yep.
>
> > Also, using only amrestore, is it possible to get at individual
> > files/directories, or
On Thursday 03 July 2003 15:10, Michael D. Schleif wrote:
>Also sprach Gene Heskett (Thu 03 Jul 02003 at 02:51:39PM -0400):
>> On Thursday 03 July 2003 11:42, Michael D. Schleif wrote:
>> >Yes, I am learning -- at the expense of many questions ;>
>> >
>> >First, a brief overview:
>> >
>> >I have fi
On Thursday 03 July 2003 18:03, bao wrote:
>Joshua Baker-LePain wrote:
>>On Thu, 3 Jul 2003 at 4:20pm, Michael D. Schleif wrote
>>
>>>Am I right that amrecover is useless *without* an index?
>>
>>Yep.
>
>No argument about it.
>But, I don't keep index files along with the backup image on tape.
>Befo
Michael D. Schleif wrote:
Also, what is the best way to turn off compression?
...
Will this persist across power cycles? Will previously hardware
compressed tapes turn hardware compression back on?
See also:
http://groups.yahoo.com/group/amanda-users/message/44453
http://groups.yahoo.com/group/
Michael D. Schleif wrote:
I am curious as to a procedure of manually -- without amanda -- viewing
and restoring from amanda-written tapes . . .
There is a good explanation of all the possible restore scenario's
in docs/RESTORE.
--
Paul Bijnens, XplanationTel +32 16 397.
Michael D. Schleif wrote:
Also sprach Joshua Baker-LePain (Thu 03 Jul 02003 at 05:41:32PM -0400):
On Thu, 3 Jul 2003 at 4:20pm, Michael D. Schleif wrote
Also, using only amrestore, is it possible to get at individual
files/directories, or is it only a matter of restoring the entire
dump/tarball?
Ye
Also sprach Paul Bijnens (Fri 04 Jul 02003 at 10:51:47AM +0200):
>
> In docs/RESTORE, you can find all the commands you need to use
> an amanda tape without amanda software.
That is an excellent document! I'm sorry that I bothered the list
before finding and reading it . . .
--
Best Regards,
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