Hello,
I'm backing up a server in Germany from a director in The Netherlands.
Using bacula, I can't seem to get past ~3000KB/s.
Here's an iperf result:
[ 3] local [fd-addr] port 16625 connected with [dir-addr] port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.1 sec 110 MBytes 91.2 Mbits/sec
Googling doesn't seem to bring much more than setting "Maximum Network
Buffer Size" on the SD and FD.
I did (to 1048576 - same value I ran the iperf tests with), but there
were no changes; anyway, even with my system default socket buffer sizes
(256K) I manage to see ~90mbits/s.
This leads me to think that perhaps the FD just doesn't have that much
data to send continuously to the SD, hence the low throughput. In theory
it could also be the storage that's too slow, but a crude test seems to
rule this out:
# dd if=/dev/zero of=/bacula/x bs=32k
^C24030+0 records in
24029+0 records out
787382272 bytes transferred in 7.044653 secs (111770197 bytes/sec)
Neither server seems to be CPU starved, either (I'm transfering
encrypted backups on a TLS connection using compression):
director:
CPU: 3.4% user, 0.0% nice, 1.2% system, 0.0% interrupt, 95.3% idle
Mem: 58M Active, 425M Inact, 405M Wired, 176K Cache, 316M Buf, 2084M Free
Swap: 2048M Total, 2048M Free
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
11 root 171 ki31 0K 64K CPU1 1 336.1H 100.00% {idle: cpu1}
11 root 171 ki31 0K 64K CPU2 2 335.9H 100.00% {idle:
emcpu2}
11 root 171 ki31 0K 64K CPU0 0 335.5H 100.00% {idle: cpu0}
11 root 171 ki31 0K 64K RUN 3 336.1H 98.49% {idle: cpu3}
46442 bacula 50 0 26796K 7268K select 0 0:01 7.08% {bacula-sd}
0 root -68 0 0K 656K - 2 0:36 1.17% {em0 taskq}
FD:
CPU: 10.9% user, 0.0% nice, 0.6% system, 0.3% interrupt, 88.2% idle
Mem: 1734M Active, 1807M Inact, 2965M Wired, 1168K Cache, 827M Buf,
1393M Free
Swap: 16G Total, 868K Used, 16G Free
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
11 root 171 ki31 0K 128K CPU7 7 5102.6 100.00% {idle: cpu7}
11 root 171 ki31 0K 128K CPU6 6 5098.5 100.00% {idle: cpu6}
11 root 171 ki31 0K 128K CPU3 3 5097.5 100.00% {idle: cpu3}
11 root 171 ki31 0K 128K RUN 0 5076.2 95.07% {idle: cpu0}
11 root 171 ki31 0K 128K CPU2 2 5076.6 92.48% {idle: cpu2}
11 root 171 ki31 0K 128K RUN 5 5100.7 87.99% {idle: cpu5}
11 root 171 ki31 0K 128K CPU4 4 5089.2 87.50% {idle: cpu4}
11 root 171 ki31 0K 128K CPU1 1 5088.6 85.35% {idle: cpu1}
40102 root 108 0 35016K 9584K CPU5 5 0:51 56.59% {bacula-fd}
12 root -28 - 0K 352K WAIT 0 40:34 3.56% {swi5: +}
So my question is, how do I go about working around this? Perhaps an
option to tell the FD to buffer stuff in memory and then send it in
bursts is available?
Please advise.
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