Hi amanda users,
I'm running dumps on a SUN E250 server, this system has been
demoted from Lotus notes and local amanda server to just an
amanda server, but has picked up additional clients.
Rather than being client/server for itself it is server for
itself as well as two Lotus notes system, both Sun T2000 servers.
The bottle neck in performance is apparently amanda-work area to
tape. It takes forever to dump the data to tape once its on the
work area. I don't think this is an amanda issue, I think its a
system bus issue, backplain seems to run at only 100Mhz.
I am running both LTO (imbedded in Storedge L9 library) and LTO3
(imbedded in C2 library), I have had these drives on other system
or similar drives on other system with much better performance.
Does anyone know where to look for the proof/smoking-gun that
says "this is the wrong platform" or of any tuning I can perform,
either system-wise or amanda feature, that might improve the
throuput to tape ?
We seem to produce completed DLE on work area more quickly than
we can put to tape, the tape is busy constantly once the first
DLE starts to flush to tape. I could add more work-area, which
migh reduce I/O and CPU load on clients sooner, but will not
complete the amanda run any sooner since the bottleneck is the
tape drives.
For reference, E250 is running Solaris 5.9, the T2000 systems run
Solaris 10, Amanda server and clients are 2.4.4. The C2/LTO3 runs
amanda 5x/week and the L9/LTO runs once on the weekend. Well, that
is what we wanted, the amanda jobs are exceeding 24 hours.
> amstatus notes
Using /usr/local/etc/amanda/notes/log/amdump from Mon Mar 17 19:30:00 EST 2008
nwcapp:/ 0 2104256k finished (22:21:20)
nwcapp:/nexport 0 84192k finished (19:35:22)
wcapp:/ 0 11179776k finished (12:54:54)
wcapp:/db 0 71562976k finished (8:18:18)
wcapp:/db2 0 9246208k finished (12:33:30)
wcapp:/export 0 5415904k finished (2:13:04)
wcnotes:/ 0 18889568k writing to tape (12:54:55)
wcnotes:/export 1 7453632k finished (23:23:30)
wcnotes:/maildb2/five 0110095430k dumping 103184224k ( 93.72%) (19:35:22)
wcnotes:/maildb2/four 0 15375740k dump done (11:27:26), wait for writing to
tape
wcnotes:/maildb2/one 0 62708540k wait for dumping
wcnotes:/maildb2/three 0 43173850k dumping 2487392k ( 5.76%) (12:54:55)
wcnotes:/maildb2/two 0 56212730k wait for dumping
wcnotes:/space 0 895424k finished (21:52:57)
wcnotes:maildbAD 1 55338550k wait for dumping
wcnotes:maildbEK 1 48909540k wait for dumping
wcnotes:maildbLQ 0 32725550k dump done (12:33:07), wait for writing to
tape
wcnotes:maildbRZ 0 9739760k finished (2:03:09)
SUMMARY part real estimated
size size
partition : 18
estimated : 18 560839789k
flush : 0 0k
failed : 0 0k ( 0.00%)
wait for dumping: 4 223169360k ( 39.79%)
dumping to tape : 0 0k ( 0.00%)
dumping : 2 105671616k 153269280k ( 68.95%) ( 18.84%)
dumped : 12 184672986k 184401149k (100.15%) ( 32.93%)
wait for writing: 2 48101290k 47701260k (100.84%) ( 8.58%)
wait to flush : 0 0k 0k (100.00%) ( 0.00%)
writing to tape : 1 18889568k 18889517k (100.00%) ( 3.37%)
failed to tape : 0 0k 0k ( 0.00%) ( 0.00%)
taped : 9 117682128k 117810372k ( 99.89%) ( 20.98%)
6 dumpers idle : no-diskspace
taper writing, tapeq: 2
network free kps: 114152
holding space : 2102533k ( 0.95%)
dumper0 busy : 8:56:50 ( 51.61%)
dumper1 busy : 10:41:22 ( 61.65%)
dumper2 busy : 9:47:27 ( 56.47%)
dumper3 busy : 0:33:58 ( 3.27%)
dumper4 busy : 7:47:41 ( 44.96%)
dumper5 busy : 0:39:35 ( 3.81%)
dumper6 busy : 17:19:47 ( 99.95%)
dumper7 busy : 8:00:03 ( 46.15%)
taper busy : 15:22:25 ( 88.67%)
0 dumpers busy : 0:00:00 ( 0.00%)
1 dumper busy : 0:21:30 ( 2.07%) no-diskspace: 0:21:30 (100.00%)
2 dumpers busy : 5:47:38 ( 33.42%) no-diskspace: 5:47:23 ( 99.93%)
start-wait: 0:00:15 ( 0.07%)
3 dumpers busy : 2:58:30 ( 17.16%) no-diskspace: 2:57:59 ( 99.72%)
start-wait: 0:00:30 ( 0.28%)
4 dumpers busy : 1:43:47 ( 9.98%) no-diskspace: 1:43:32 ( 99.76%)
start-wait: 0:00:15 ( 0.24%)
5 dumpers busy : 3:57:23 ( 22.82%) no-diskspace: 3:57:03 ( 99.86%)
start-wait: 0:00:20 ( 0.14%)
6 dumpers busy : 1:51:45 ( 10.74%) no-diskspace: 1:51:20 ( 99.63%)
start-wait: 0:00:24 ( 0.37%)
7 dumpers busy : 0:00:38 ( 0.06%) no-diskspace: 0:00:22 ( 59.68%)
start-wait: 0:00:15 ( 40.32%)
8 dumpers busy : 0:39:04 ( 3.76%) not-idle: 0:39:04 (100.00%)
---
Brian R Cuttler brian.cuttler AT wadsworth DOT org
Computer Systems Support (v) 518 486-1697
Wadsworth Center (f) 518 473-6384
NYS Department of Health Help Desk 518 473-0773
IMPORTANT NOTICE: This e-mail and any attachments may contain
confidential or sensitive information which is, or may be, legally
privileged or otherwise protected by law from further disclosure. It
is intended only for the addressee. If you received this in error or
from someone who was not authorized to send it to you, please do not
distribute, copy or use it or any attachments. Please notify the
sender immediately by reply e-mail and delete this from your
system. Thank you for your cooperation.
|
