Date: Wed, 19 Jun 2002 01:28:07 +0800 From: "Derek Barrett" <derekbarrett@graffiti.net> To: <sporner@nentec.de>, <freebsd-cluster@FreeBSD.ORG> Subject: Re: Application cluster Message-ID: <20020618172808.25913.qmail@graffiti.net>
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hahahahaha well as a fellow American then I should have replied, "Thanks partner! USA!" I don't think you should dismiss your scripts that "only start and stop" as being laughable. To me, that's 75% of the battle. I know I've spent hours at times just getting my startup scripts to work properly, missing a switch here or there, the trial and error involved in that is alot sometimes. And getting a RELIABLE method of monitoring the other servers has still been a challenge for everyone. Truly, getting a failover server to successfully take over means: 1) Reduced late night phone calls 2) Not having to make as many late night phone calls :-D And most of these types of scripts depend on having a second network card and a serial cable as well. The Linux HA servers even have a controlling server for the entire cluster called a Director. That your mechanism goes across a network card is nice, the less overhead, the better. I mean, a couple thousand dollar hardware failover solution is nice, but so would a Ferrari as a company car. I recently worked in a high uptime enviornment, and every single server there had an identical backup, run by a hardware failover switch, and let me tell you, I got really SPOILED. The amount of stress relief that those failover switches provided made troubleshooting and maintenance a breeze. Let me see what I can come up with for a place for you to post your file. Derek ----- Original Message ----- From: Andy Sporner <sporner@nentec.de> Date: Tue, 18 Jun 2002 10:02:13 +0200 To: Derek Barrett <derekbarrett@graffiti.net>, freebsd-cluster <freebsd-cluster@FreeBSD.ORG> Subject: Re: Application cluster > Hi Derek, > > > > >I would also love to take a look at this failover script. > > > It's a daemon and some scripts. > > > > > > >What types of apps have you used this on so far? > > > You will laugh, but simple scripts that say "I am starting, I am stopping" > because I never had enough time to get out of the test phase > > > > >Do you use a serial cable for the heartbeat monitor mechanism? > > > Actually not. It uses network interfaces to send heartbeats. I had up to > 6 machines running once (different architectures IE: Sparc, VAX, and I386). > But lately I have been only working with two and three machines (all I-386). > In the early days it was multi platform (people who used linux was also > using it--which was a surprise because I never thought it was that > portable). > These days I am focusing on FreeBSD only--again because of time--but > mostly also because I am starting to use some system specific stuff as it > becomes more elaborate. > > > > >Danke, > > > Thanks for this, but I am an American working in Germany. ;-) > I do fool a lot of people though because I have pick up an accent. > > PS. Do you know a place where I can put the 'tar' file so that > people can get to it? My main website is down for about the > next two weeks. > > Andy > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-cluster" in the body of the message > > -- _______________________________________________ Get your free email from http://www.graffiti.net Powered by Outblaze To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-cluster" in the body of the message
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