Re: Trying to disable Multicast to run multiple JavaSpace's

Hi Timur

"A local JavaSpace is really all we need at the current time."

GigaSpaces provide an embedded space feature which enables you to create and
access a local instance of a space without going through the LUS.
Our JCA adaptor provides a standard interface for deploying and allocating
the space in a J2EE container while sharing the J2EE transaction context.

For more information about those features please refer to the following list
of references to our online product documentation:

1. The following reference provides a description of the GigaSpaces
embedded-space feature.
http://www.gigaspaces.com/docs/doc/The_embedded_space.htm

2. The following reference provides a description of our J2EE connector
architecture.
http://www.gigaspaces.com/docs/doc/Using_GigaSpaces_with_J2EE_Applications.h
tm

3. The following reference provides description of the configuration element
which enables you to switch between an embedded space or remote space
without changing any line of code.
http://www.gigaspaces.com/docs/doc/Configuring_a_J2EE_Application_Server.htm

4. You can download a free version of GigaSpaces from the following url:
http://www.gigaspaces.com/downloads.html

Regards
Nati S.
GigaSpaces CTO
www.gigaspaces.com



-----Original Message-----
From: timur mehrvarz [mailto:[email protected]]
Sent: Tuesday, March 22, 2005 4:52 PM
To: [email protected]
Subject: Re: Trying to disable Multicast to run multiple JavaSpace's

Hi Jools, Dan,

these are the reasons:

1st, our operational guys don't like the multicast announcements. (This
one must not be counted if you can help me fix the other two.)

2nd, I would like to run multiple services, side by side, each with
their own local Javaspace. I would like to be sure that each service is
accessing it's own, local Javaspace. Our services use a unicast URL to
contact their local lookup server. But with multiple spaces up and
running in the same network, you never know which space you are really
provided with. (At least I don't.)

3nd, there is a problem running multiple spaces, if there are firewalls
that blocks everything except multicast packages (so Jini announcements
slip through). In such an environment, my local lookup-server may
provide my local service with the address of a Javaspace instance
running behind a firewall. In this case, there is no way for my service
to access that Javaspace instance (and my service throws exceptions -
even though there is a local JS running fine).

A local JavaSpace is really all we need at the current time.

BR, Timur

(I repost, because I got a "Symantec Mail Security detected prohibited
content in a message...")


On 22 12:46:36 PM, at 12:46 PM, Dan Creswell wrote:

> timur mehrvarz wrote:
>> Hello,
>>
>> we're trying to disable multicast traffic, so that we can run two (or
>> more) JavaSpaces in parallel - in the same LAN.
>>
>
> As Jools has already suggested, you don't need to disable multicast to
> have multiple JavaSpaces running on the same LAN.
>
> Can you please provide more details regarding why:
>
> (a)     You want to disable multicast
> (b)     Why you think you need to disable multicast to support multiple
> JavaSpaces on one LAN.
>
> Many thanks,
>
> Dan.
>
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===========================================================================
To unsubscribe, send email to [email protected] and include in the body
of the message "signoff JAVASPACES-USERS".  For general help, send email to
[email protected] and include in the body of the message "help".

To view past JAVASPACES-USERS postings, please see:
http://archives.java.sun.com/archives/javaspaces-users.html

JDC members can download the JavaSpaces(tm) Technology from:
http://developer.java.sun.com/developer/products/jini/

===========================================================================
To unsubscribe, send email to [email protected] and include in the body
of the message "signoff JAVASPACES-USERS".  For general help, send email to
[email protected] and include in the body of the message "help".

To view past JAVASPACES-USERS postings, please see:
http://archives.java.sun.com/archives/javaspaces-users.html

JDC members can download the JavaSpaces(tm) Technology from:
http://developer.java.sun.com/developer/products/jini/