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svetur
 Post subject: Load balancing
PostPosted: Wed Mar 07, 2007 5:19 pm 
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Joined: Mon May 29, 2006 7:07 pm
Posts: 287
Location: Denver
What is the best way to balance linux servers with a2billing when you have lots of customers and concurrent calls???

1 dedicated machine with database
then x machines with asterisk and a2billing.

Separate DID's, 1 per machine and etc???

I need some ideas?? For example i want to limit 60 concurrent calls per machine and if i have more users calling can i redirect them to another linux server??
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crshman
 Post subject:
PostPosted: Wed Mar 07, 2007 6:46 pm 
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Joined: Thu Aug 10, 2006 10:47 pm
Posts: 145
Location: LA,CA,USA
You are getting into rocky territory with this.....

OpenSER is going to be your best bet, or put asterisk behind some other SBC......

OpenSER and SBC's are a whole new arena in themselves.....so be prepared for a HUGE learning curve.....
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microcosmic
 Post subject:
PostPosted: Wed Mar 07, 2007 7:30 pm 
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Joined: Thu Jan 18, 2007 5:37 pm
Posts: 131
Location: Mallorca / Spain
crshman

do u have any experience with OpenSER ?

i think when the next 2 projects will get through we really need such a solution
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crshman
 Post subject:
PostPosted: Wed Mar 07, 2007 7:32 pm 
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Posts: 145
Location: LA,CA,USA
Yes i'm working with OpenSER right now....i have a beta cluster of 2 asterisk servers LBed behind an OpenSER proxy......btu it's still in the works.....no where near production ready....
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microcosmic
 Post subject:
PostPosted: Wed Mar 07, 2007 7:39 pm 
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Joined: Thu Jan 18, 2007 5:37 pm
Posts: 131
Location: Mallorca / Spain
do you think it is possible to install openser on a pentium 3/600 to do tests ?

i would place 2 asterisk servers behind it then to give it a try
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crshman
 Post subject:
PostPosted: Wed Mar 07, 2007 7:40 pm 
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Joined: Thu Aug 10, 2006 10:47 pm
Posts: 145
Location: LA,CA,USA
Yes, you can install it on whatever you want...i run it in VMware.....

Compiling and installing is easy, configuration files....that's the beast....
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JustMe
 Post subject:
PostPosted: Wed Mar 07, 2007 7:47 pm 
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Joined: Wed Dec 13, 2006 9:06 pm
Posts: 94
you could also simply buy a Cisco local director off of ebay for $500 :P
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crshman
 Post subject:
PostPosted: Wed Mar 07, 2007 7:49 pm 
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Joined: Thu Aug 10, 2006 10:47 pm
Posts: 145
Location: LA,CA,USA
Personally i hate cisco....so i couldn't do that :lol:

EDIT---------

Actually further investigation shows that this device would NOT work....it's not an SBC, it does not load balance realtime streams
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svetur
 Post subject:
PostPosted: Thu Mar 08, 2007 6:33 am 
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Joined: Mon May 29, 2006 7:07 pm
Posts: 287
Location: Denver
Load Balancing with DUNDi

this is interesting
http://www.asterisk.org/node/48321
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crshman
 Post subject:
PostPosted: Thu Mar 08, 2007 6:36 am 
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Joined: Thu Aug 10, 2006 10:47 pm
Posts: 145
Location: LA,CA,USA
But that kind of defeats the whole purpose.......OpenSER is an SBC, it registers and proxy's SIP sessions, while asterisk *can* do this, it's not very good it at.....
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JustMe
 Post subject:
PostPosted: Thu Mar 08, 2007 6:54 am 
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Joined: Wed Dec 13, 2006 9:06 pm
Posts: 94
I have a pair of local directors in front of some * boxes used for a pbx and it works great for my application :-)
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crshman
 Post subject:
PostPosted: Thu Mar 08, 2007 6:57 am 
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Posts: 145
Location: LA,CA,USA
Interesting....enlighten me...and us on how you accomplish this, i'd loove to hear this :)
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JustMe
 Post subject:
PostPosted: Thu Mar 08, 2007 7:05 am 
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Joined: Wed Dec 13, 2006 9:06 pm
Posts: 94
Well...it simply redirects tcp and udp traffic from a "virtual IP" port to "real IP" machines. It does different variable load balancing methods from max connections to round robin etc...

I got the pair from a local used computer store for $20 each (had no idea they were worth a lil more) tried it out and it worked.
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crshman
 Post subject:
PostPosted: Thu Mar 08, 2007 7:07 am 
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Joined: Thu Aug 10, 2006 10:47 pm
Posts: 145
Location: LA,CA,USA
Can it handle far end NAT transversal?
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JustMe
 Post subject:
PostPosted: Thu Mar 08, 2007 7:10 am 
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Joined: Wed Dec 13, 2006 9:06 pm
Posts: 94
I would assume so considering that to the user devices eg. web client, sip phone, etc. don't even know it's there. The virtual IP address acts as if it is the real server IP
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