Hi all, I know that freeswitch has not been designed as a pure sip proxy/registrar, but I'm wondering how many subscribers could be handled by FS. I setup the following test environment: - Kamailio 1.4.2 as the registrar - all invite requests are flowing through FS, even for a call between 2 registered subscribers. Many reasons for this: the calls CDR are centralized in the same format, I can easily add a billing ID to a call, proceed to recording, set the caller as anonymous if requested... - FS is used also as a SBC There is still a lot of work to do, mainly on the call forwarding feature and this is why I'm wondering (simply out of curiosity) what could have been achieved using only FS (easier to setup when only one equipment is involved :) ). I'd like to register 40 000 subscribers (if each user registers every 60s, you have approx 670 registration per second, this setup is working on Kamailio). I did the following to increase FS performance regarding registration: - put the directory containing users in a RAMDISK - put the db directory in a RAMDISK with this I was able to reach 190 registration per second (50 without the ramdisk) but for one SIP account, not too useful :p (for your information I see a huge improvement when switching from 1.0.1 phoenix: 150cps to FS svn 105xx: 190) When trying with 25000 SIP accounts, I got no more than 30cps. Then I tried to use the odbc mysql for registration, using this I was able to achieve 50cps. The mysql DB is not in a RAMDISK. For all these tests, the presence support has been disabled. As the IO performance seems to be a bottleneck, I'd like to know if there is a way to store the registration in memory only without database persistency. This thread is there only to share tips, not to complain about FS poor performance as a SIP registrar when compared to Kamailio. If I compare FS to a commercial SBC I'm using in production, I have to say that FS is really a great piece of software (lacks only statistics module, snmp, and heartbeat redundancy for failover). regards, rod