Ben actually implemented an example of this for me recently and I'm in the
process of researching and tweaking it for our application. This is
definitely the way to go for availablility and message integrity in a
clustered environment.
We'll also be managing alot of system level caching with the message queue
tags, expiring, updating and deleting cache elements on the fly with little
or no overhead. The possibilities for synchronization, maintaining system
caches and even keeping directories of files up to date is almost limitless.
Oh yeah, best of all it implements a Spectra service for you, abstracting
into 2 custom tags.
Only a small amount of configuration is necessary to get it running in your
environment. I'll bet if everyone asks real nice (and sends cookies or
alcohol, or maybe even ColdFusion mints) he'd put them on the gallery.
-
jason.
-----Original Message-----
From: Richard Ragan [mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 22, 2001 12:28 PM
To: Spectra-Talk
Subject: Re: Spectra meta-data
Yes, it does use message queues.
He mentioned this in a class I was in recently. He uses a message
queue to record actions all servers in the cluster need to perform with
one message for each server. The servers periodically poll for work
they need to do and, in this case, index some new content into Verity
on their local box.
We have done this using an HTTP post to each box which will fail
if one of the boxes is down at that moment. Message queues avoids
this problem.
Rich
> > When you use any Verity based technology with a cluster, you
> > will have to think about how to update the clusters on other
> > machines. This is NOT a show stopper, it's just something you
> > have to think about. Ben Elmore had a _cool_ idea about how to
> > handle this. Ben, want to describe it for the group? :)
>
> >>>Ben (or anyone else with similar experience), could you describe your
> >>>solution?
>
> Matt-
>
> I'm just guessing, but I'll bet his solution has something to do with
> Message Queues ;-)
>
>
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