[Icecast-dev] icecast relay server performance testing

[Alejandro]

Zahar, how are you testing? with some CURL stress test? BTW, IPTABLES is
enabled?

I was running most time in VMWARE, but i run 10k users in medium size box
in AWS, just move out for the high transfer cost.

2016-06-10 2:36 GMT-03:00 Zahar Popov <zahar.popov1978 at yandex.com>:

> Hi Alejandro,
> Here is mine:
>
> <limits>
> <workers>4</workers>
> <clients>100000</clients>
> <sources>2000</sources>
> <queue-size>102400</queue-size>
> <client-timeout>30</client-timeout>
> <header-timeout>15</header-timeout>
> <source-timeout>10</source-timeout>
> <burst-on-connect>1</burst-on-connect>
> <burst-size>65536</burst-size>
> </limits>
> Your queue-size is larger, i will try to increase that.
>
> thanks!
> --zahar
>
> 10.06.2016, 14:31, "Alejandro" <cdgraff at gmail.com>:
>
> Please share your config, almost the LIMITS part, this is my setup
>
>     <limits>
>     <workers>8</workers>
>         <clients>100000</clients>
>         <sources>700</sources>
>         <queue-size>524288</queue-size>
>         <client-timeout>30</client-timeout>
>         <header-timeout>15</header-timeout>
>         <source-timeout>10</source-timeout>
>         <burst-size>65535</burst-size>
>     </limits>
>
> 2016-06-10 2:28 GMT-03:00 Popov, Zahar <zahar.popov1978 at yandex.com>:
>
> Hi Alejandro,
> Many thanks for your message.
>
> I changed it to 4 (i have 4 cores), but it didn’t really help. I see that
> all 4 cores are now working, but the connections are still being dropped.
>
> Which VM type are you using? Or it’s not running on AWS?
>
> thanks!
> —zahar
>
> On Jun 10, 2016, at 1:29 PM, Alejandro <cdgraff at gmail.com> wrote:
>
> Sorry, 35K concurrent with 8 workers at 60% cpu
>
> 2016-06-10 1:28 GMT-03:00 Alejandro <cdgraff at gmail.com>:
>
> Hi Zahar, what value has into
>
>     <workers>8</workers>
>
> This value is recommended to set at 1 by virtual core.
>
> I 'm using for some years, KH branch with 35 concurrent listeners into 8
> core vm.
>
> Regards,
> Alejandro
>
> 2016-06-10 0:50 GMT-03:00 Zahar Popov <zahar.popov1978 at yandex.com>:
>
> Hello
> I'm trying to measure the performance of the icecast relay server on
> 64kbps streams.
>
> The server is running in AWS (i've tried various instance types) and the
> test clients are running on other machines in AWS. The test client is a
> very simple libuv application that sends a GET request and basically
> ignores everything it receives in the response. I'm using the icecast-kh
> fork.
>
> I'm able to go up to around 9K simultaneous connections to the server
> (from two machines). The CPU usage is low, about 15% or so (on one core).
> However connections are starting to be dropped. Checking netstat i see many
> frames being lost. Increasing the transmit queue length helped, but still i
> can't go beyond around 9K connections. I have increased the file descriptor
> limits and configured IRQ balancing (even though the problem doesn't seem
> to be CPU bound)
>
> It doesn't matter if i run one or more instances of the relay server, the
> limit seems to be OS global so when one instance is running with 5K
> connections and the other instance is getting close to 4K connections they
> both start dropping connections.
>
> I assume that there is some other setting of the stack that i didn't
> configure so i was wondering if anybody was able to run a few dozens of
> thousands of connections on one server.
>
> thanks!
> --zahar
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