On 23 Jul 2002 at 5:11pm, Mark Cooke wrote > Total Full Daily > -------- -------- -------- > > Output Size (meg) 3132.7 3132.7 0.0 > Original Size (meg) 4377.7 4377.7 0.0 > Avg Compressed Size (%) 71.6 71.6 -- > ------------cut-------------- > > Am I correct in thinking that this run it used 71.6% of the total amount > of tape, also the compression doesn't seem that much > (used hight-tar with best compression)
Nope. Original size is the size of the data on disk. Output size is the size after being software compressed -- that's how much data is being put on tape. 3132.7/4377.7 = 0.716 > 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. > I have chosen to turn of hardware compression as well. Good. Never mix software and hardware compression. > 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? > ------------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. It looks to me like a permissions problem. Are those directories NFS mounted? -- Joshua Baker-LePain Department of Biomedical Engineering Duke University
