[Serusers] Location table issues

Java Rockx javarockx at yahoo.com
Mon Sep 27 00:53:09 CEST 2004 

Michael,

I've not done any Wiki editing either but I'll do the work if you guide me
along with the technical content.

This could be a really good thing for the ser and Asterisk communities because
I suspect many people are either attempting this type of clustering now or will
need to shortly. 

I know I personally need a carrier-grade solution for my needs and I'm
searching for ways to achieve the golden five-nines of availability. But even
if I didn't need 99.999% uptime, I'd still strive for it even if I was just
replacing an office PBX for a ser/Asterisk solution because of typical customer
care requirements that most companies face.

Cheers from soggy Orlando.

Paul

--- Michael Shuler <mike at bwsys.net> wrote:

> Actually if you want to be really cool you can also config SER to read
> Asterisk's sipfriends table so they can share a common auth/user lookup
> system.  My setup uses several SER servers acting as load balancing
> proxies/auth servers which then proxy the calls evenly across a cluster of
> Asterisk servers that all read a common config from MySQL.  This basically
> gives you infinite scalability for both clusters.  If I get some free time I
> was going to post my config files up on www.voip-info.org but I have never
> done Wiki editing before, but if you have then maybe we can get it up there
> together.
> 
> ----------------------------------------
> 
> Michael Shuler, C.E.O.
> BitWise Communications, Inc. (CLEC) And BitWise Systems, Inc. (ISP)
> 682 High Point Lane
> East Peoria, IL 61611
> Office: (217) 585-0357
> Cell: (309) 657-6365
> Fax: (309) 213-3500
> E-Mail: mike at bwsys.net
> Customer Service: (877) 976-0711 
> 
> > -----Original Message-----
> > From: Java Rockx [mailto:javarockx at yahoo.com] 
> > Sent: Sunday, September 26, 2004 2:21 PM
> > To: Michael Shuler; serusers at lists.iptel.org
> > Subject: RE: [Serusers] Location table issues
> > 
> > 
> > Michael,
> > 
> > I think your idea for a db_mode 3 is a good idea especially 
> > considering that
> > I'll soon be in the same position as you with respect to ser.
> > 
> > On an Asterisk note you mentioned patches at
> > http://svn.asteriskdocs.org/res_data/. Do these patches allow 
> > Asterisk to store
> > user and server configuration data in a MySQL database rather 
> > than in .conf
> > files? If not, could you elaborate a bit on what these 
> > patches fix or features
> > that they provide?
> > 
> > Best Regards,
> > Paul
> > 
> > --- Michael Shuler <mike at bwsys.net> wrote:
> > 
> > > I figured that's what people would say :( thanks though.
> > > 
> > > I thought of that but the problem is that it takes up to 
> > the max time of my
> > > longest REGISTER client timer before its back in sync with 
> > the one that runs
> > > off the DB.  It would be nice if there was a 3rd option i.e.
> > > modparam("usrloc", "db_mode", 3) that would make it read 
> > only at startup to
> > > "seed" the memory database.  The reason I need this is 
> > because I have a few
> > > SER servers behind a Foundry ServerIron XL layer 4 switch.  
> > When I bring the
> > > failed server back online the Foundry automatically 
> > recognizes that port
> > > 5060 is alive again and immediately starts sending it 
> > traffic.  If the RAM
> > > based location table hasn't been fully populated by the 
> > time this happens
> > > then we have a bunch of failed calls until it syncs up 
> > which in my case is
> > > up to 5 min.  I can get around this manually by removing it 
> > from the cluster
> > > config in the Foundry but that takes away from the 
> > automation of the whole
> > > thing.
> > > 
> > > Andrei/Jiri, what do you guys think of adding that as an 
> > option?  It seems
> > > to me that it would be the most logical way to go about 
> > doing it and should
> > > be very easy to do since all it is combining parts of mode 
> > 0 and 1/2.  I
> > > have little experience doing any programming in SER 
> > otherwise I would just
> > > write it and submit it as a patch.  Most of my time gets 
> > sucked up into
> > > Asterisk patches (see http://svn.asteriskdocs.org/res_data/ 
> > for MySQL
> > > dynamic config files, this is a must for carriers... Well 
> > at least for me :)
> > > ), but if you 2 don't have time or don't think its worth 
> > while then I guess
> > > I will have find time.  Please let me know what you guys 
> > think of this as
> > > soon as you get a chance.
> > > 
> > > ----------------------------------------
> > > 
> > > Michael Shuler, C.E.O.
> > > BitWise Communications, Inc. (CLEC) And BitWise Systems, Inc. (ISP)
> > > 682 High Point Lane
> > > East Peoria, IL 61611
> > > Office: (217) 585-0357
> > > Cell: (309) 657-6365
> > > Fax: (309) 213-3500
> > > E-Mail: mike at bwsys.net
> > > Customer Service: (877) 976-0711 
> > > 
> > > 
> > > 
> > > > -----Original Message-----
> > > > From: Maxim Sobolev [mailto:sobomax at portaone.com] 
> > > > Sent: Sunday, September 26, 2004 3:28 AM
> > > > To: Michael Shuler
> > > > Cc: serusers at lists.iptel.org
> > > > Subject: Re: [Serusers] Location table issues
> > > > 
> > > > 
> > > > Michael Shuler wrote:
> > > > 
> > > > > Let's say I have 2 SER servers (ser1 and ser2).  Both save 
> > > > to the same MySQL
> > > > > location table and both use t_replicate to let each other 
> > > > know about new
> > > > > REGISTER's.  Lets say ser1 gets a REGISTER from a client 
> > > > and then calls
> > > > > t_replicate to send it over to ser2 and both call 
> > > > save("location").  Doesn't
> > > > > that cause ser1 and ser2 to write the same record at about 
> > > > the same time to
> > > > > MySQL?  Is there any way to prevent doubling the number of 
> > > > database writes?
> > > > 
> > > > You can configure one of the ser's to do not use database 
> > at all for 
> > > > storing contacts, which will do what you want - contacts will 
> > > > be saved 
> > > > by the another ser, while t_replicate() will ensure that 
> > both of them 
> > > > have a whole set at any moment of time.
> > > > 
> > > > -Maxim
> > > > 
> > > > > 
> > > > > Does anyone know what the replicate column is for in the 
> > > > location table?
> > > > > 
> > > > > ----------------------------------------
> > > > > 
> > > > > Michael Shuler, C.E.O.
> > > > > BitWise Communications, Inc. (CLEC) And BitWise 
> > Systems, Inc. (ISP)
> > > > > 682 High Point Lane
> > > > > East Peoria, IL 61611
> > > > > Office: (217) 585-0357
> > > > > Cell: (309) 657-6365
> > > > > Fax: (309) 213-3500
> > > > > E-Mail: mike at bwsys.net
> > > > > Customer Service: (877) 976-0711 
> > > > > 
> > > > > _______________________________________________
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> > > > > serusers at lists.iptel.org
> > > > > http://lists.iptel.org/mailman/listinfo/serusers
> > > > > 
> > > > > 
> > > > 
> > > 
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> > 
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> > 
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