Hi, Below tape performance from running similar workload in version 3.2.0 and recently upgraded version 3.3.7p1. In this run I'm doing tape to tape vaulting. As you can see a huge degraded writing performance. I'm running the backup on Solaris 10 on sparc. Xfer IO seems to be much slower than in previous version for some reason ? Any ideas how to proceed and find out what's going on ?
Thanks Gunnar Gunnarsson 3.2.0 Tape Time (hrs:min) 3:02 3:02 0:00 Tape Size (meg) 747221.3 747221.3 0.0 Tape Used (%) 170.2 170.2 0.0 DLEs Taped 16 16 0 Parts Taped 29 29 0 Avg Tp Write Rate (k/s) 70005.0 70005.0 -- USAGE BY TAPE: Label Time Size % DLEs Parts Orabck-Unix-194 1:49 440059M 94.4 12 18 Orabck-Unix-195 1:11 307162M 65.9 4 11 3.3.7p1 Tape Time (hrs:min) 4:54 4:54 0:00 Tape Size (meg) 598327.5 598327.5 0.0 Tape Used (%) 135.9 135.9 0.0 DLEs Taped 11 11 0 Parts Taped 23 23 0 Avg Tp Write Rate (k/s) 34738.8 34738.8 -- USAGE BY TAPE: Label Time Size % DLEs Parts Orabck-Unix-196 3:19 410261M 88.0 7 15 Orabck-Unix-197 1:32 188066M 40.4 4 8 -----Ursprungligt meddelande----- Från: owner-amanda-us...@amanda.org [mailto:owner-amanda-us...@amanda.org] För Gunnarsson, Gunnar Skickat: den 3 september 2015 22:11 Till: Jean-Francois Malouin; amanda-users@amanda.org Ämne: SV: Tape write rate much slower efter upgrade I'm doing amvault from disk to tape the workload on the server is the same no shortage of memory cpu resources. Xfer rate to tape reduced by 60% from version 3.2.0 to 3.3.7 ! -----Ursprungligt meddelande----- Från: owner-amanda-us...@amanda.org [mailto:owner-amanda-us...@amanda.org] För Jean-Francois Malouin Skickat: den 3 september 2015 21:37 Till: amanda-users@amanda.org Ämne: Re: Tape write rate much slower efter upgrade Hi, * Jean-Louis Martineau <martin...@zmanda.com> [20150903 15:21]: > Gunnar, > > Do the number by DLE always differ? > Are you using a holding disk? > Can you monitor the server to find some bottleneck, memory, cpu, > network, disk I/O, ... I witnessed the same behaviour back in February when upgrading from 3.3.5 to 3.3.7. I tried to post to the list a few times but somehow my posts never made it, maybe because they had 2 pics attached showing the performance from the hold disk to the tape drive. Here's what I wrote back then: "2 weeks ago I upgraded one of my amanda server from 3.3.5 to 3.3.7. Right away I noticed a ~25% tape write performance degradation to a LTO4 tape drive. I've attached 2 pics showing the xfer IO rate to/from the holddisk: one shows a snapshot of the week after the upgrade with the 10th of Feb still at 3.3.5 (and a xfer rate of ~100MBs) and a drop to ~75MBs after the upgrade was done. I reverted back to 3.3.5 a few days ago and the 2nd snapshot shows a return to previous rate." HTH, jf > > Jean-Louis > > On 03/09/15 02:49 PM, Gunnarsson, Gunnar wrote: > > > >Hi, > > > >See below slow down in avg tp write rate after having upgraded amanda > >from 3.2.0 to 3.3.7p1 nothing else is changed. > > > >We are using DLT drivers SCSI and fiber connected. > > > >Thanks Gunnar > > > >Tape Time (hrs:min) 2:37 2:37 0:00 > > > >Tape Size (meg) 382968.9 382968.9 0.0 > > > >Tape Used (%) 324.1 324.1 0.0 > > > >DLEs Taped 462 462 0 > > > >Parts Taped 462 462 0 > > > >Avg Tp Write Rate (k/s) 41670.4 41670.4 -- > > > >(brought to you by Amanda version 3.2.0) > > > >Tape Time (hrs:min) 4:18 4:18 0:00 > > > >Tape Size (meg) 384525.8 384525.8 0.0 > > > >Tape Used (%) 334.0 334.0 0.0 > > > >DLEs Taped 481 481 0 > > > >Parts Taped 481 481 0 > > > >Avg Tp Write Rate (k/s) 25469.2 25469.2 -- > > > >(brought to you by Amanda version 3.3.7p1) > > > >Tape Time (hrs:min) 6:03 1:46 4:18 > > > >Tape Size (meg) 710405.4 208727.0 501678.5 > > > >Tape Used (%) 161.0 47.4 113.6 > > > >DLEs Taped 12 4 8 1:7 2:1 > > > >Parts Taped 27 8 19 1:11 2:8 > > > >Avg Tp Write Rate (k/s) 33357.3 33701.7 33216.0 > > > >USAGE BY TAPE: > > > > Label Time Size % DLEs Parts > > > > Orabck-Unix-002 3:37 431135M 92.5 11 19 > > > > Orabck-Unix-003 2:25 279270M 59.9 1 8 > > > >(brought to you by Amanda version 3.3.7p1) > > > >Tape Time (hrs:min) 3:13 0:11 3:01 > > > >Tape Size (meg) 776730.9 50668.0 726062.8 > > > >Tape Used (%) 177.9 12.6 165.3 > > > >DLEs Taped 18 4 14 1:9 2:5 > > > >Parts Taped 33 4 29 1:11 2:18 > > > >Avg Tp Write Rate (k/s) 68857.4 77438.9 68329.0 > > > >USAGE BY TAPE: > > > > Label Time Size % DLEs Parts > > > > Orabck-Unix-015 1:34 392152M 84.2 4 12 > > > > Orabck-Unix-016 1:34 384579M 82.5 14 21 > > > >(brought to you by Amanda version 3.2.0) > > >
