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Posted to slide-user@jakarta.apache.org by Warwick Burrows <wa...@e2open.com> on 2004/08/04 21:18:07 UTC
RE: Cache refresh notification in two different instance of Slide
running on different boxes.
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. So what other features make up Slide's
clustering implementation? And what is the underlying network transport for
the cache update notification events that are sent between the servers?
Warwick
-----------------------------------------------------------
Warwick Burrows E2open
Senior Engineer 9600 Great Hills Trail, #325
http://www.e2open.com Austin TX 78759
-----------------------------------------------------------
-----Original Message-----
From: James Mason [mailto:masonjm@apache.org]
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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>
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Re: Cache refresh notification in two different instance of Slide
running on different boxes.
Posted by James Mason <ma...@apache.org>.
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:masonjm@apache.org]
> 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
>>
>>---------------------------------------------------------------------
>>To unsubscribe, e-mail: slide-user-unsubscribe@jakarta.apache.org
>>For additional commands, e-mail: slide-user-help@jakarta.apache.org
>>
>>
>>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: slide-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: slide-user-help@jakarta.apache.org
>
> ---------------------------------------------------------------------
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Re: RE: Cache refresh notification in two different instance of Slide running on different boxes.
Posted by Daniel Varghese <da...@gmail.com>.
Hello Burrows,
I asked this specific question because we have a production
deployment not clustered but, all server instances are deployed on
different boxes and managed thru a H/W loadbalancer. Right now we are
routing all Slide server request to a particular server instance. I
was investigating how we can synchronize the cache information b/w
multiple servers which is running on different machines.
I really appreciate James and his teams effort to do the cache
synchronization implemenation in Jakarta Slide2.1.
So we really waiting for August 10 to release the Slide2.1.
rgds
Daniel
On Wed, 4 Aug 2004 12:18:07 -0700 , Warwick Burrows
<wa...@e2open.com> 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. So what other features make up Slide's
> clustering implementation? And what is the underlying network transport for
> the cache update notification events that are sent between the servers?
>
> Warwick
>
>
> -----------------------------------------------------------
> Warwick Burrows E2open
> Senior Engineer 9600 Great Hills Trail, #325
> http://www.e2open.com Austin TX 78759
> -----------------------------------------------------------
>
>
>
>
> -----Original Message-----
> From: James Mason [mailto:masonjm@apache.org]
> 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
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: slide-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: slide-user-help@jakarta.apache.org
> >
> >
> >
>
> ---------------------------------------------------------------------
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>
> ---------------------------------------------------------------------
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>
>
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