Hi Nathan
I was having the same problem as well and in my case I just added the
following option: ( I cant remember exactly what number I specified but
I think it was about a 1/4 of what you have trying, just keep bring it
down till you get the result you need)
I hope this works for you.
Stan
**--bwlimit=KBPS**
This option allows you to specify a maximum transfer rate in
kilobytes per second. This option is most effective when using rsync
with large files (several megabytes and up). Due to the nature of
rsync transfers, blocks of data are sent, then if rsync determines
the transfer was too fast, it will wait before sending the next data
block. The result is an average transfer rate equaling the specified
limit. A value of zero specifies no limit.
On 3/10/12 5:23 AM, Nathan Steele wrote:
I tried this:
nice -n 19 ionice -c3 rsync -av --bwlimit=20000
the problem remained, I stood in the controll room and watched the
rdairplay screen, it would freeze for several seconds, run a few
seconds, and freeze again, this went on for 2 minutes then I went and
killed the rsync by ctrl-c, went back to the control room and this
behaviour continued, to the end of the the song, then there was a period
of dead air, the next element ( a liner) was jumped (it was not a hard
time event either) and the next song played, things returned to normal
at this point. the whole time the screen was freezing, the song that was
playing played fine.
if I understood correctly, 20000 should be 20000 kB, so 20 mB/s, on a
gigabit connection should not be a problem...
what am I missing?
I did notice that out of 4GB of RAM on the server, i had only ~300 mb
free, but that seems it should be enough also. for curiosity though, how
do I find what is using the memory and free some up if possible?
Any suggestions where to look for my bottleneck?
thanks.
PS I tried the ionice and bwlimit on the box I run samba on and it
worked well, this machine hosts a database for our timeclock software
and the rsync backup made it grind to a halt and timeclock becam
unresponsive, the machine was just a spare clunker we had when our old
one died, and it is pretty low spec. these commands made the timeclock
usable during the backup, sluggish, but useable.
Nathaniel C. Steele
Assistant Chief Engineer/Technical Director
WTRM-FM / TheCrossFM
On 10/2/2012 1:36 PM, James Harrison wrote:
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Correspondingly, the ionice command may help.
Cheers,
James Harrison
On 02 October 2012 18:08:33, Stan Fotinos wrote:
Hi Nathan
Have you tried using the following option? --bwlimit=
Stan
On 2/10/12 11:26 PM, Nathan Steele wrote:
Hi all,
Having a problem with rsync lately (don't recall having it before, but
not sure what changed, or maybe I just didn't notice).
The background info:
Rivendell broadcast appliance on a server machine with a 6 drive raid 5
(hardware controller) hosting mysql and /var/snd, and the delta 1010
audio card, rivendell broadcast appliance on an airplay machine, CAE
running on the server (airplay runs on this machine but the audio comes
out the server soundcard). A network drive is mounted as /backup on the
server machine. the rivendell machines have gigabit nics and are on a
gigabit switch, the network drive is 100 megabit nic.
The problem:
Running rsync -alv /var/snd /backup causes latency between the songs
playing out. the songs play fine once they start, but we get a few
seconds of dead air between songs, and it really throws the jocks off if
they are on air.
niceing it didn't help at all nice -n 19 rsync -alv /var/snd /backup,
actually seemed to make it worse...
I can't imagine the network is clogging....the cpu utilization seems to
be fine, as well as RAM.......
Any Ideas?
the purpose of course is to backup my audio. any suggestions? am I using
the wrong switches? should I be using a negative number for nice? (I
read the docs and it seemed like i wanted a positive number..)
thanks,
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