I want to ensure tapes are filled 100% each time where possible. I've written a script in python to look at directory, figure out size, and create a disklist which will ensure a round about size for each disklist file - so for instance it will try to create a disklist file that contains entries in groups of 400gb's - the size of a tape. I know amanda will fill a tape to 100% where possible but sometimes, if it is using compression, this doesn't work, and the first two tapes will fill 500gb+ and then the last tape will be left with 200gb. This is a waste of 200gb - I'm trying to make sure all tapes are full where possible and not waste any space.
I know I could take the tape that is half full and archive the contents again with added content but this is time consuming. I just want to make sure amanda is working with my script to make sure all tapes are being filled. Do you see what i'm getting at? Thanks, Brian Cuttler wrote: > Rory, > > When I am using tape compression I often...sorry. > > When using SW tape compression amanda will know what the > typical compression is for any given DLE and will (I believe) > use the expected compressed size of the data when estimating > overall tape usage. > > When I use HW compression I often lie about the tape length, > extending the actually physical size by the expected compression > amount so that I am able to utilize the full physical tape. > This is very valuable for me in the couple of cases where I > have a non-spanning DLE that is larger than the physical tape > would be without compression, else amanda would report that the > DLE was larger than the tape... > > What goal/outcome are you seeking ? > > Brian > > On Wed, Jan 05, 2011 at 11:34:47AM -0500, rory_f wrote: > > > Hey, > > > > So I've noticed that sometimes Amanda will fill up a tape with more than > > 400gb (LTO3) - I'm assuming this is down to compression? Is there another > > way to limit this from happening apart from turning hardware and software > > compression off? > > > > Thanks, > > > > +---------------------------------------------------------------------- > > |This was sent by rory < at > mrxfx.com via Backup Central. > > |Forward SPAM to abuse < at > backupcentral.com. > > +---------------------------------------------------------------------- > > > > > > > --- > +---------------------------------------------------------------------- |This was sent by r...@mrxfx.com via Backup Central. |Forward SPAM to ab...@backupcentral.com. +----------------------------------------------------------------------
