Re: [OpenSIPS-Users] [Blog] Traffic balancing – load, weights, round robin ??

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Re: [OpenSIPS-Users] [Blog] Traffic balancing – load, weights, round robin ??

Bogdan-Andrei Iancu-2
Hi Robert,

All the time there is space for more :). This blog post is the first
from a set of docs trying to explain the routing with OpenSIPS.

Including some feedback from you, I can draft as following chapters:
     1) how to insert a balancer in your SIP traffic - like dialog
statefull proxy, transaction statefull proxy, stateless proxy, etc....
     2) routing modules in opensips, like dispatcher versus drouting
versus load-balancer..


In your classification, I noticed many missing features for Dynamic Routing:
     - in memory matching with prefix-tree - O(prefix_len)
     - has gui in Control Panel
     - destination pinging, failover, re-enable
     - clustering capabilities for the state of the GW/destinations
     - rule fallback (on matching)
     ......

Again, any feedback is more the welcome as it will give us some ideas
about the hot topics from the user perspective.

Best regards,

Bogdan-Andrei Iancu
   OpenSIPS Founder and Developer
   http://www.opensips-solutions.com

OpenSIPS Bootcamp 2017, Houston, US
   http://opensips.org/training/OpenSIPS_Bootcamp_2017.html

On 06/15/2017 09:36 PM, Mundkowsky, Robert wrote:

> This is helpful. But would like a little more details there. Such as:
>
> 1) openSIPS when it actions as a Load Balancer is always a SIP proxy during the complete dialog. In other words, the caller RTP is direct connected backend gateway, but openSIPS is always between them for the SIP traffic.
> 2) Some information for the traffic distributions modules is stored in the database, but some info is only in memory (e.g. which gateway is enabled, count of active dialogs)
>
> This might be naïve details for most telecom folks, but helpful for naïve users like myself.
>
> I haven't played with "Carrier Route","Dispatcher", and "Dynamic Routing", but similar notes for those would be helpful too.
>
> The following video was very helpful in describing the different traffic distributions modules openSIPS supports:
>
> https://www.youtube.com/watch?v=yTLPs1-X0SM
>
> Not sure if my notes are helpful, but they are below.
>
> Routing modules:
> Carrier Route
> - old module and not maintained, but seems to work
> - features: routing, load balancing, blacklisting
> - not installed by default
> - no web GUI
>
> - performs longest prefix matching
> - you use longest preefix to pull "least cost" route out of database table
> - strips prefix, adds prefix/suffix
> - probabilities to load balancer
>
>
> Load Balancer
> - light weight
> - balancing based on load
> - can config via GUI
> - single database table
>
> - features:
> - no prefix/suffix changing
> - with version 1.8, you can keep counters in database
>
> - docs:
> Tutorial
> http://www.opensips.org/Documentation/Tutorials-LoadBalancing-1-9
> DB schema:
> https://www.opensips.org/Documentation/Install-DBSchema-2-2#AEN6455
> module
> http://www.opensips.org/html/docs/modules/2.2.x/load_balancer.html
>
> Dispatcher
> - computes hash over parts of request and selects an address from the destination list
> - can config via GUI
> - CallerID, From URI, To URI, Request URI
> - via config file or databaseas
> - does not strip or append prefix/suffix
> - out of service destinations detected by probing
> - can mark as out of service
> - can mark as in service when gateway comes back online
>
> Dynamic Routing
> - heavy weight
> - multiple criteria to determine route
> - prefix, caller, group, time, priority
> - databse only
> 4 tables (groups, rules, carriers, gateways)
>
> - functions
> - do_routing() uses all 4 tables
> - route_to_carrier uses carriers & gateways tables
> - route_to_gateway - uses gateways table
>
>
>
>
> Robert Mundkowsky
>
>
> -----Original Message-----
> From: Devel [mailto:[hidden email]] On Behalf Of Bogdan-Andrei Iancu
> Sent: Thursday, June 15, 2017 2:01 PM
> To: [hidden email]; developensips <[hidden email]>; [hidden email]; [hidden email]
> Subject: [OpenSIPS-Devel] [Blog] Traffic balancing – load, weights, round robin ??
>
> Many times, during discussion about various OpenSIPS based solutions, I noticed that people make a confusion when comes to the meaning of “load balancing”.....
>
> https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fblog.opensips.org%2F2017%2F06%2F15%2Ftraffic-balancing-load-weights-round-robin%2F&data=02%7C01%7Crmundkowsky%40ets.org%7Ce9218868262d4ce369ac08d4b4189373%7C0ba6e9b760b34fae92f37e6ddd9e9b65%7C0%7C0%7C636331465027654678&sdata=0acaS2xE6vYbvzOIyBIJC48oMhOLKF7j3YqKnDp98nI%3D&reserved=0
>
> Enjoy the reading :)
>
> --
> Bogdan-Andrei Iancu
>     OpenSIPS Founder and Developer
>     https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.opensips-solutions.com&data=02%7C01%7Crmundkowsky%40ets.org%7Ce9218868262d4ce369ac08d4b4189373%7C0ba6e9b760b34fae92f37e6ddd9e9b65%7C0%7C0%7C636331465027664682&sdata=lUNkjOnT%2FEZ%2FR%2Fvr%2B9wyPoECMq3B%2FFwU4OjzvlwN7yY%3D&reserved=0
>
> OpenSIPS Bootcamp 2017, Houston, US
>     https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fopensips.org%2Ftraining%2FOpenSIPS_Bootcamp_2017.html&data=02%7C01%7Crmundkowsky%40ets.org%7Ce9218868262d4ce369ac08d4b4189373%7C0ba6e9b760b34fae92f37e6ddd9e9b65%7C0%7C0%7C636331465027664682&sdata=uT%2FNvQ3PfVFHXwSzRvis9FUw08RP%2Fwa5Uz0cj6by1Ec%3D&reserved=0
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>
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