Mitch Jackson
2006-Jul-11 07:44 UTC
[asterisk-users] Server Optimization and Load Balancing
I'm hoping to get some guidance on some of our asterisk growing pains. Any help is greatly appreciated. Over the last few months, our call center has grown considerably and we're now experiencing choppy calls and dropped calls under full capacity. We have around a 60/40 outgoing to incoming ratio At the moment, we've got the following configuration: Asterisk SVN-trunk-r7230 All calls recorded to disk External mysql server for CDR + IVR operations Dual Xeon 2.8 4GB Ram (Dell) Digium TE210P 2 x PRI lines 72 Ploycom 301P SIP phones using ulaw codec We have a second identical server ready to offset some of the load, but we're not sure how to balance the sip phones and configuration files between the two servers. If we balance the sip registrations between the two servers, then there's the issues of both servers having to handle one call via IAX in some situations. What kind of experiences, problems and solutions have y'all had when adding servers to your center? Should we try to have incoming on one server and outgoing on the other? Should we have both servers capable of handling all the IVR operations, so the other server doesn't have to? Should we try to have an identical configuration between both servers and load balance? What kind of general optimizations should we look at to improve network / server performance? Is there a way to easily register each phone with all asterisk servers, and have the phone choose a random server to dial, and then be available as a SIP to each server if it needs to contact it? Is it a bad idea to register all phones with each server instead of distributing registration? -Here's some of the things we're got planned in the next few days: -Make sure we have all audio files in all codec formats to reduce the need for transcoding in IVR -Convert all music on hold from mp3 to native codec formats -Reduce database operations from within extensions.conf -Upgrade switches on each set of desks to midrange enterprise 100MB switches with gigabit uplinks, from SOHO netgear 100MB switches Thanks, /mitch /fidelity reserves -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20060711/81e7fd72/attachment.htm
Keep us posted! You have a good real world load with some decent horsepower behind it so it will be interesting to see how your temporary changes you have planned in the next few days pan out...I suspect the SOHO switches could be part of the problem. What is the load on the server? Bill ________________________________ From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Mitch Jackson Sent: Tuesday, July 11, 2006 10:44 AM To: asterisk-users@lists.digium.com Subject: [asterisk-users] Server Optimization and Load Balancing I'm hoping to get some guidance on some of our asterisk growing pains. Any help is greatly appreciated. Over the last few months, our call center has grown considerably and we're now experiencing choppy calls and dropped calls under full capacity. We have around a 60/40 outgoing to incoming ratio At the moment, we've got the following configuration: Asterisk SVN-trunk-r7230 All calls recorded to disk External mysql server for CDR + IVR operations Dual Xeon 2.8 4GB Ram (Dell) Digium TE210P 2 x PRI lines 72 Ploycom 301P SIP phones using ulaw codec We have a second identical server ready to offset some of the load, but we're not sure how to balance the sip phones and configuration files between the two servers. If we balance the sip registrations between the two servers, then there's the issues of both servers having to handle one call via IAX in some situations. What kind of experiences, problems and solutions have y'all had when adding servers to your center? Should we try to have incoming on one server and outgoing on the other? Should we have both servers capable of handling all the IVR operations, so the other server doesn't have to? Should we try to have an identical configuration between both servers and load balance? What kind of general optimizations should we look at to improve network / server performance? Is there a way to easily register each phone with all asterisk servers, and have the phone choose a random server to dial, and then be available as a SIP to each server if it needs to contact it? Is it a bad idea to register all phones with each server instead of distributing registration? -Here's some of the things we're got planned in the next few days: -Make sure we have all audio files in all codec formats to reduce the need for transcoding in IVR -Convert all music on hold from mp3 to native codec formats -Reduce database operations from within extensions.conf -Upgrade switches on each set of desks to midrange enterprise 100MB switches with gigabit uplinks, from SOHO netgear 100MB switches Thanks, /mitch /fidelity reserves -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20060711/25814205/attachment.htm
Henry J. Cobb
2006-Jul-11 08:22 UTC
[asterisk-users] Server Optimization and Load Balancing
"Mitch Jackson" <perimus@gmail.com> wrote:> Over the last few months, our call center has grown considerably and we're > now experiencing choppy calls and dropped calls under full capacity....> All calls recorded to disk...> 72 Ploycom 301P SIP phones using ulaw codecIf you run this command vmstat 5 Does it show lots of processes that are blocked, waiting for the disk? If I had to do this I would have a battery backed writeback RAID controller. -- Henry J. Cobb http://www.io.com/~hcobb/