Thanks for your quick answer. Ok it sounds clear to me that all points to
the advantages of having software compression. I will then disable hardware
compression.

Regards
Marc



                                                                                
                                                               
                                                                                
                                                               
                    Joshua               To:     marc.bigler AT day DOT com     
                                                                      
                    Baker-LePain         cc:     amanda-users AT amanda DOT org 
                                                                      
                    <jlb17 AT duke DOT ed       Subject:     Re: DAT hardware 
or software compression                                                 
                    u>                                                          
                                                               
                                                                                
                                                               
                    11/20/02 02:52                                              
                                                               
                    PM                                                          
                                                               
                                                                                
                                                               
                                                                                
                                                               




On Wed, 20 Nov 2002 at 2:13pm, marc.bigler AT day DOT com wrote

> I have got here a DDS-3 tape drive which has per default hardware
> compression enabled and was wondering what is the best deal with AMANDA.
> Would you guys suggest hardware compression or should I disable hardware
> compression and have software compression done for example with gzip ?

It's personal preference, really.  If you've got the cycles, software
compression is generally better and (depending on CPU power of course)
faster than hardware.  It also allows amanda to better plan, as it knows
*exactly* how big your tapes are and can keep a history of compression
levels.  Hardware compression, well, takes load off your server and/or
clients, but you have to lie to amanda about your tapelength.

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