Shreedhar,
Super answers. I'll work on getting them into the new user FAQ as Bill
Shannon suggested.
Tom
Shreedhar Ganapathy wrote:
>
> I'll try answering some
>
> Tom Amiro wrote:
>
>> Hi,
>>
>> I'd like to share questions we were asked by attendees at our
>> Glassfish pod during Boston Tech Days. For some, I'd like to get back
>> to the person with a good answer; for others, it just would be good
>> to know more.
>>
>> * Is there a way to secure communication between client and
>> service without having to manually install certificates on
>> systems? Maybe an API to create certificates or a way to
>> dynamically establish trust?
>> * Is there a simple way to change the admin user's password using
>> the Admin Console?
>> * In reference to the Clusterjsp demo we showed, one attendee
>> asked what are instances and is there any legitimate use for
>> having a cluster on a single machine?
>>
> Instances are Java EE server processes to which Java EE applications
> can be deployed and served from. In a clustered environment, a number
> of instances are created to help distribute the load of incoming
> requests (assuming these are fronted by a load balancer or an IP
> sprayer) and to build redundancy for continued availability of service
> without interruption due failure/crash of one or more instances in the
> cluster. In other words, a cluster of instances prevents a single
> point of failure in the software layer of your topology.
> Going a step further, session state replication provides continued
> availability of both service and session data so that site's customers
> can be agnostic to failures of software processes/hardware.
>
> Having a cluster on a single machine limits the ability to
> horizontally scale and creates a single point of failure (that of the
> machine's failure). So for a non-mission critical business, one may
> choose to have a (hopefully) multi (core or) cpu, single machine with
> sufficient RAM to host a cluster of instances to save space, cost and
> possibly energy costs. Ideally two boxes at the minimum with 2 network
> interfaces each would help bring hardware redundancy for any software
> service that is being offered in a cluster of instances.
>
>
>> * A few persons wanted to see lists of who (companies) are using
>> GF. We showed them the blogs.sun.com/stores page, but is there
>> a more comprehensive list?
>>
> correction on the link : http://blogs.sun.com/stories
>
>> * Others asked for statistics on the market share of GF compared
>> to other Application Servers.
>> * Of course we got the question from quite a few: What is an
>> application server?
>>
> A piece of software that serves applications through the internet to
> provide a service.
> Java EE Application Servers do this by implementing the Java EE
> Specification.
>
>> * Why is glassfish named glassfish?
>>
> Its see-through :)
>
>> * Does the portal server run on GF?
>> * Does java.net run on GF?
>>
>> * One very interested person asked, do you have a sales kit,
>> promotional material, brochure, fliers, datasheet, etc that I
>> can take to my management to get them interested in GF?
>> * Does GF support Ajax?
>>
> Checkout http://ajax.dev.java.net or http://jmaki.dev.java.net and
> http://blueprints.dev.java.net for real world ways to use /Web 2.0
> /technologies with Java EE.
>
>> * Does GF have something comparable to IBM's JAM plugin to
>> support mainframe updates?
>> * For load balancing, does GF have a plugin for Apache web server?
>>
> Sun Java System Application Server 9.1 officially supports load
> balancing using Apache Web Server and mod_jk plugin, also Microsoft
> IIS 6 and Sun's Web Server 6.1sp5 and 7.0
> A number of blog entries have been written in blogs.sun.com or
> java.net on supporting Apache web server for load balancing and
> proxying to GF.
> One such example with additional links in it:
> http://blogs.sun.com/dadelhardt/entry/loadbalancing_with_mod_jk_and_glassfish
>
> --Shreedhar
>
>> Tom
>