On Tue, 2002-07-23 at 17:24, Joshua Baker-LePain wrote:
>
> > If the tapes apparently capable of holding 8.0GB (DDS2) at a 2:1
> > compression rate, the above seems that its not really compressing it at
> > all effectively.
>
> That's an (optimistic) estimate of hardware compressed size. You're data
> isn't that compressible.
that I gather :-)
>
> > I have chosen to turn of hardware compression as well.
>
> Good. Never mix software and hardware compression.
Using: /bin/mt -f /dev/nst0 defcompression 0
>
> > What would be the best option to use for as much compression as
> > possible?
>
> What you're doing probably. Software compression also lets amanda plan
> tape usage better, as it knows exactly how much compression is going on.
> You are telling amanda your tapelength is ~4GB, right?
I presume you mean am I using the correct tapetype?
I removed compression and then ran tapetype for a DDS2 and got this (I
altered the comment):
define tapetype DDS2 {
comment "DDS2 Compression off"
length 3900 mbytes
filemark 160 kbytes
speed 453 kps
}
>
> > ------------cut--------------
> > HOSTNAME DISK L ORIG-KB OUT-KB COMP% MMM:SS KB/s MMM:SS KB/s
> >
> > heimdall /scripts 0 10 32 320.0 0:00 103.9 0:01 45.7
> > idun -/downloads 0 10 32 320.0 0:00 432.6 0:01 61.8
> > ------------cut--------------
> >
> 32KB is the size of a single amanda block, thus the increase. Is there
> really only 10KB of stuff in those directories.
yup
It looks to me like a
> permissions problem. Are those directories NFS mounted?
Nope, that server is exporting NFS, but I'm backing up the server side,
rather than the client (the scripts are owned by root)
Mark
--
---
To steal ideas from one person is plagiarism;
to steal from many is research.
