26 May
2010
26 May
'10
4:01 p.m.
On Wed, May 26, 2010 at 2:23 AM, marius zbihlei <marius.zbihlei(a)1and1.ro> wrote:
Thanks.
JR
--
JR Richardson
Engineering for the Masses
JR Richardson wrote:
Hello,
I am using cr_route, not cr_prime_route. I tested with large call
samples, 2K and 10K, the call distribution was within 1% accross all
servers, very nice.
Hi All,
I'm testing carrierroute module on version: kamailio 1.5.4-notls
(i386/linux).
I'm distributing calls to a group of Asterisk servers, all in the same
carrier and domain, wanted to load balance the calls and I'm curious
how this works. I see the 'probability' parameter in the carrierroute
table and set it to equal value across all servers, I have 4 servers
I'm sending calls to, so I set each prob value to '0.25'. I'm testing
with sipp and hashing over call_id so this is the same for every
call. I send 40 calls and the distribution of calls to the asterisk
servers are 11, 12, 6, 11, pretty close to even but not 100%
How does the distribution algorithm work for carrieroute? Does it
statefully track all active calls and load balance across each server
in destination group? Is there another algorithm that can offer that
can get closer to a round robin effect?
Hello JR,
The distribution algorithm works by doing a CRC32 on the Call_id(I suppose
you use cr_route not cr_prime_route), and dividing than number so it
reflects the probability you gave . Your data sample is too small to show
the correct distribution; if you can test with a 2000 calls scenario, and
the Call-Id is randomized as it should, then the distribution will be
uniform. The carrierroute module does not keep track of balanced calls.
Another question is do I need to include the record_route() and the
t_check_trans() functions prior to calling the carrierroute functions?
I see in the debug "DBG:core:forward_reply: found module tm, passing
reply to it" and dialogs seem to process fine, so does the
carrierroute module handle those requirements for stateful processing?
Thanks.
AFAIK, the decision to call record_route() is orthogonal with the
carrierroute module. The same for stateful / stateless processing (you can
use carrierroute module both stateless or statefull depending on what you
want)
JR
Cheers
Marius