[SR-Users] voltdb support

[Alex Balashov]

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 <sr-users-bounces at lists.kamailio.org> On Behalf Of Alex Balashov
> Sent: Monday, December 14, 2020 10:31 PM
> To: sr-users at lists.kamailio.org
> 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/