Given a simple workflow where only one HTTP query is involved, I would
recommend the async module. It's very straightforward to make the query
out of the main request route, and pack the response into a 3xx redirect
and send it out the door in the async reply route.
I've had to mix both modules in situations where there's a pipeline of
HTTP requests -- what a pain.
I'm not sure of your request volumes, but I would set these to a
relatively high number, e.g. 3x-4x the number of SIP children= processes
you have.
https://kamailio.org/docs/modules/5.4.x/modules/http_async_client.html#idm55
-- Alex
On 12/14/20 3:35 PM, Ali Taher wrote:
What do you recommend using : http sync or async client modules?
-----Original Message-----
From: sr-users <[email protected]> On Behalf Of Alex Balashov
Sent: Monday, December 14, 2020 10:31 PM
To: [email protected]
Subject: Re: [SR-Users] voltdb support
On 12/14/20 3:28 PM, Ali Taher wrote:
What I need is to fetch routing from VoltDB and send it back to switch
using 3xx response. So I think the API solution is the best approach
here. Thanks for all this useful info. >
If Kamailio is sending the 3xx response, then it sounds like using the HTTP
modules to interact with VoltDB's JSON interface might be the best way to go.
You'll have to account for the latency inherent in such queries and make sure
you have a sufficient number of worker processes to handle the load, whether
you use the async or synchronous HTTP modules. For more information on that
topic, you can read an old blog post of mine:
http://www.evaristesys.com/blog/tuning-kamailio-for-high-throughput-and-performance/
-- Alex
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
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--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
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