I only do HW compression. I tried the software compression once before and it was excruciating slow. I have a newer tape server with many more cores so maybe I should give SW compression another try.The big question is how much better is the SW compression than the HW compression? What do I gain.
Well any way the range that Toomas gave is about the range that I have been seeing so maybe things are working OK. Thanks all for your comments. Robert _____________________________________________________________________ Robert P. McGraw, Jr. Manager, Computer System EMAIL: [email protected] Purdue University ROOM: MATH-807 Department of Mathematics PHONE: (765) 494-6055 150 N. University Street West Lafayette, IN 47907-2067 On 5/24/13 12:24 AM, "Toomas Aas" <[email protected]> wrote: >Hello! > >On Thu, 23 May 2013 "McGraw, Robert P" wrote: > >> >> I use hardware compression to max the size of the tape. Uncompressed >> the tape is 800GB compressed the theoretical max size is 1.6TB. I >> know that I will not get the 1.6TB. >> >> In the amanda.conf file I tell amanda that my tape is "length 1500 >> gbytes" and that my tape drive uses LEOM. > >For a real life data point, on my LTO4 tape drive with HW compression >enabled I get 900 GB to 1.1 TB. > >-- >Toomas Aas >
