Skip site navigation (1)Skip section navigation (2)
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>

next in thread | raw e-mail | index | archive | help
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




Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020618172808.25913.qmail>