On Thu, Aug 19, 2010 at 03:27:07PM -0400, Jean-Francois Malouin wrote: > Hi, > > I know that a little while ago I reported this problem but I still > can't get my head around it: ever since I upgraded to amanda-3.1.x the > avg tape stats in amreport are bogus. I know for a fact that the > holddisk io read stats (from munin) --as this is when the taper starts > pushing stuff out of the holddisk to the tape-- are consistently above > 100MBs for the run yet amreport says ~14MBs. This lead me to suspect > that the starting time for the taper to start to write the first DLE > is wrongly set or parsed or something along this. > > Parts Taped 33 30 3 (1:3) > Avg Tp Write Rate (k/s) 14644.4 14648.0 256.4 > > DUMP SUMMARY: > DUMPER STATS > TAPER STATS > HOSTNAME DISK L ORIG-MB OUT-MB COMP% MMM:SS KB/s MMM:SS > KB/s > ------------------------- -------------------------------------- > -------------- > gaspar /opt/amanda 0 542 542 -- 0:34 16401.1 0:10 55471.0 > gertrude /opt/amanda 0 484 484 -- 0:16 31234.0 809:11 > 10.2 > tutor -aid/bicadmin1 0 86061 86061 -- 72:15 20329.5 12:27 > 117973.9 > tutor /raid/catlim1 0 715398 715398 -- 736:59 16566.8 113:14 > 107825.6 > tutor /raid/data1 1 1 1 -- 0:03 281.0 0:05 190.0 > tutor /raid/data2 1 2 2 -- 0:04 354.9 0:05 308.0 > tutor /raid/data3 1 1 1 -- 0:03 334.8 0:04 275.0 > tutor /raid/data4 0 0 0 -- 0:00 180.7 0:04 2.5 > tutor /raid/data5 0 0 0 -- 0:00 177.1 0:05 2.0 > tutor /raid/data6 0 0 0 -- 0:00 183.0 0:05 2.0 > tutor /raid/data7 0 0 0 -- 0:00 178.9 0:04 2.5 > tutor /raid/data8 0 0 0 -- 0:00 182.4 0:05 2.0 > tutor /raid/proj0 0 0 0 -- 0:00 180.3 0:05 2.0 > wart /opt/amanda 0 592 592 -- 0:18 34354.8 0:11 55100.9 >
I think the calculation is correct (total column 4 / total column 9 is 14.3MB/s). But you're observation of taping at >100MB/sec is also correct :) Note your client "gertrude". That one DLE is throwing the average to hell<-<-ck. Of your total data taped, 803,077MB, gertrude is only contributing 484MB. However her time to tape is 809 minutes out of 936 minutes total. So her 0.5% of the data taped takes 86.4% of the time to tape. Leaving gertrude out of the calculation I calculate the others tape at 105.3MB/s. Why is gertrude so slow? jl -- Jon H. LaBadie [email protected] JG Computing 12027 Creekbend Drive (703) 787-0884 Reston, VA 20194 (703) 787-0922 (fax)
