thanks for the replies !!


There's no bandwidth limit.
where can I find the dumpers and number of jobs info ?
For the SW compression in vary depending of the server/parition.

reg,

Frederic Medery
System Administrator

LexUM, University of Montreal



Brian Cuttler wrote:

Frederic,

What are the tuning parameters ?

Are you bumping into an amanda imposed bandwidth limit ?
What are the settings for max dumpers and number of jobs
you can run at one time for each client ?
What level of SW compression are you using ?


On Fri, Jul 09, 2004 at 10:22:46AM -0400, Joshua Baker-LePain wrote:

On Fri, 9 Jul 2004 at 9:27am, Frederic Medery wrote

We have more and more prob with the backup : it takes more then 14 h.

It's not amanda fault just the amount of data. :-)

How much per night?

For now we have a backup server with a amanda partition with 18 GB connected to a IBM LTO Ultrium 3581 tape Charger (7 tapes). The Hardware compression is off (sofware compression is used).

Now we have GB network and faster server with losts of RAM and HD spaces and I want to install Amanda on our prod server which have the largest amount of data.

so is-ti better (faster backup) to have  :
hardware or software compression ?
A larger amanda partition ?

More holding space is going to give you the biggest boost. Software vs. hardware compression with regards to speed depends on your hardware -- if the CPUs can compress the data as fast as the disk/network can take it, then it isn't going to slow you down.

Also note that, with your LTO drive, you can turn on hardware compression *and* use software compression on selected DLEs if you so choose.

--
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University

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