On Wed, 2003-11-05 at 11:55, hkirrc.patrick wrote: > i m a newbie with * so in all likelihood my question will sound stupid > to you but aren't there HA support for linux already? > as to the pstn interfaces, i thought most traditional PBX uses redundant > equipment to provide HA; > can't we do the same with * being the switch?
That depends, HA support in linux can make sure that a server or service is there to handle certain failures. RAID is there to support failing disks, and hotswap is an option for not having down time when it comes to fixing the failure. Same goes with hot swappable power supplies. On PC hardware, I think that is about as far as you can go on a single machine. The next step is to write software that can jump in and take over services when it detects the primary has failed. This isn't too difficult on a VoIP machine as the phones talk to a IP address that can be assumed on failure. This is supported currently for several services. On a PSTN connection though, you get the problem of physical interfaces. While it was recently mentioned that there is a device for T1 interfaces to fail over in the case of alarm, and this could allow a new machine to pick up and deal with calls from the PSTN. Of course for those of us on all Zap interfaces, this would be interesting in that we would have the failover piece on our inbound, and potentially on each T1 interface to our channel banks. You would loose any in process calls, but new calls would route fine. Of course as I think back, The Intertel hardware our sister company was installing didn't have any HA features. I wouldn't consider this a CON so much as a classification of what is possible to do. I doubt the hardware the person who started this thread has has any HA features built into it right now. -- Steven Critchfield <[EMAIL PROTECTED]> _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
