Comments below.
Warwick Burrows wrote:
Daniel,
I'm a little confused by this question. Why wouldn't you use Slide clustering but still synchronize the caches of the two servers? Are there features of Slide clusters that you don't want?
James,
What is the Slide clustering design? I remember a note where you said that load-balancing is not a function of Slide clustering but that cache consistency between servers is.
When I say load-balancing isn't something Slide handles, I mean with a cluster of Slide servers something else (a load-balancer) must decide which requests go to which Slide server. Slide can't, and I think shouldn't, pass requests to other servers in a cluster.
So what other features make up Slide's clustering implementation?
Slide currently supports "clustering" by pointing all your Slide instances at the same Store, then disabling the global cache of each Slide instance. This works, but without the global cache there is a noticeable slowdown in the amount of time each transaction takes. What I'm working on is a way to keep the global cache enabled and inform the other servers in a cluster that their cache needs to be updated when a resource changes.
And what is the underlying network transport for the cache update notification events that are sent between the servers?
The first implementation will use JMS, mainly because I've used it before and I'm wanting to get this done before the feature freeze for 2.1. The ultimate goal is to use WebDAV notifications to send events between servers. Unfortunately Slide doesn't support persistent subscriptions for notifications yet, so it's not quite ready for this. An acceptable alternative would be JGroups, but I've never used it before, and as I said, I'm in a bit of a hurry :).
-James
Warwick
----------------------------------------------------------- Warwick Burrows E2open Senior Engineer 9600 Great Hills Trail, #325 http://www.e2open.com Austin TX 78759 -----------------------------------------------------------
-----Original Message-----
From: James Mason [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 04, 2004 10:50 AM
To: Slide Users Mailing List
Subject: Re: Cache refresh notification in two different instance of Slide
running on different boxes.
Daniel Varghese wrote:
Hello James,
thnx for your valuable information abt Slide Clustering and Cache refresh notifications among the cluster nodes couple of days back.
You're welcome.
Now I have another question.
Two instance of Slide running on two different Unix boxes and I'm not planing to use Cluster, In this senario how do we notify the cache information between different server instances.
You don't yet. Hopefully I'll be able to submit the code that does this tonight. I upgraded my desktop yesterday evening and there's a bug in the mysql update I got, so I haven't been able to test it yet.
-James
Cluster Configuration is a must for cache refresh notification ?
rgds Daniel
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