Re: [jgroups-users] Question on JChannel instances

On 29/05/16 14:52, Questions/problems related to using JGroups wrote:
> Can you join more than one group/cluster (JChannel.connect) with a
> single instance of JChannel?

No

> I have a need for being a member of multiple groups per computer
> (targeting android based devices) and i have some memory allocation
> and device overhead concerns. I'm considering a few different
> strategies but I figured this group would be a great place to ask.

Take a look at ForkChannels

> Basically, I'd have one group that everyone joins without reliable
> delivery that's primarily used for peer discovery and broadcast
> messages (to everyone).

OK

> Users than then spawn off and join additional
> groups on the fly (with reliable delivery) to exchange information
> with group members but not everyone (to reduce overall bandwidth usage
> and device loading)
>
> This sounds right, but if there are other options or configurations
> that work, i'm all ears


It's perhaps better to just have a single channel and bypass protocols 
that are not needed for a given message using *message flags*. E.g. do 
add NAKACK2 and UNICAST3 to your config, but set flag NO_RELIABILITY for 
a given message if you want to skip those 2 protocols.

-- 
Bela Ban, JGroups lead (http://www.jgroups.org)


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