[rsyslog] How to test rsyslog performance

[Sayan Chowdhury]

Hello David,
Thanks a bunch ..
I will try this, I was also thinking in similar lines, in the sense that I
will log 1 line of message, set the file size to be huge, and then count the
number of lines on the file.
I just read the numbers on Rainer's blog, and I think I will need the
tcprelay approach as well, there is no way I can generate so much load with
a shell script.
Thanks for the tip.
Regadrs,
Sayan


On Mon, Jun 29, 2009 at 12:46 PM, <david at lang.hm> wrote:

> On Mon, 29 Jun 2009, Sayan Chowdhury wrote:
>
> > Hi,
> > I saw the announcement of the 4.2.0 stable version of rsyslog. I was
> > wondering if there is a way I can test the performance of rsyslog with my
> > own rsyslog.conf.
> > The way I am trying to use rsyslog is on a local system, which has
> following
> > rules
> >
> > logging different facilities to different files with different formats.
> > forwarding certain facilities to an external server.
> > receive messages from one(and only one) other machine over udp.
> >
> > Are there any tool/scripts available which I can use to perform the tests
> > myself?
> > Basically what I am thinking of is running a script which writes is bunch
> of
> > messages to syslog, but then how do I make sure all those messages were
> > actually logged and not lost? It may be very painful to look through the
> > entire log file 1 message at a time :)
> > Is there a stat/counter based api which shows me how many messages were
> > logged?
>
> what I do is to send a known quantity of messages and include a identifier
> string in the message ('rsyslog-test-message' for example), and then grep
> the resulting files to make sure that the right number of messages arrive.
>
> to send messages to rsyslog I have used tcpreplay to replay UDP messages.
> I first setup a system to send the messages via UDP, start tcpdump, send
> the messages to the local box (which then sends them via UDP to a remote
> server), then I stop tcpdump and can use the resulting capture file with
> tcpreplay to replay the messages at different speeds.
>
> David Lang
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