Hi Vince,
For compatible applications follow the steps below for rolling upgrade. GF
supports it even with a single cluster. If you need a script, I can forward
it you.
deploy AppVersion1
Start cluster
Enable dynamic LB
Quiesce instanceA
Deploy AppVersion2
start instanceA
repeat these steps for other instances (instanceX)
Quiesce instanceB
start instanceB
.....
--
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<http://www.sun.com/>
*Vishal Mehra
*Expert Technologist
Sun Professional Services Delivery
*Sun Microsystems, Inc.*
Mobile 408-768-1929
Email vishal.mehra_at_Sun.COM
On Tue, Aug 4, 2009 at 10:51 AM, <Vince.Power_at_medavie.bluecross.ca> wrote:
> I haven't found the real benefit of using clusters inside glassfish other
> than it makes mapping targets easier when creating resources or deploying
> applications.
>
> If you have to configure multiple clusters to have no downtown during an
> upgrade you might as well just skip clustering and configure multiple
> standalone installs of GlassFish and just use a load-balanacing appliance in
> front of your servers and just follow a loop of Quiesce/redeploy/unQuiesce .
>
> Rolling updates and being able to export a deployed EAR/WAR are two
> features I miss now that I'm moving to GlassFish from WebSphere.
>
> Regards,
> Vince
>
>
>
> From:glassfish_at_javadesktop.orgTo:users_at_glassfish.dev.java.netDate:08/04/2009
> 02:41 PMSubject:Re: Deploying to a cluster with no downtime
> ------------------------------
>
>
>
> What's the benefit of the cluster then?
> [Message sent by forum member 'dbsquared' (dbsquared)]
>
> http://forums.java.net/jive/thread.jspa?messageID=358829
>
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