Hi Jim, At 08:48 10/30/2001 -0500, jim barchuk wrote:
>Hello Melvyn! > > > However - since we replicate our servers, to ensure high availabity, we > > like to poll if the > > primary is up. We do this, because when a host is down (not the mysql > >Big Brother is a bit of an overkill for the 'one' thing you're asking for >but it's a dynamite generic 'server monitoring' tool and you might find >other uses for it. It can page or email you when 'something' does down. >http://www.bb4.com Hi Jim, I know about big-brother and it might work for other tasks, but not in this case. The reason for replication is that our visitors are not bothered by our problems or maintenance windows. So - this php function, checks if mysql is alive and then disconnects after 15 seconds or successfull connect, whichever comes first. So there's a 15 second delay max. However - we also use a file-based caching mechanism, so in theory only users within that 15 second period experience the delay (and every 20 minutes another 15 seconds if the downtime lasts). If the primary is not available, the php function uses the secondary server, to ensure the information is processed. Big Brother cannot help out there and like I said, it's not only problems, it can also mean maintenance windows, like disk-array maintenance or a kernel upgrade. >Have a :) day! THanx - and u2. >jb Met vriendelijke groeten / With kind regards, IDG.nl Melvyn Sopacua WebMaster --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
