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Can gigaspace XAP run without multicast?

Hi there,

I searched the forum for an answer to the above question and I believe XAP can run completely on unicast if the network infrastructure forbids multi-cast. Can anyone confirm this is fine for a live (not-test) environment?

What are the disadavantages to running only unicast? I think there would not be any functional limitations, but what about System Performance, Replication & monitoring-wise?

In my setup, I plan to use a 3-machine cluster which needs to run within the company LAN only. Thanks, Bern

asked 2014-02-17 01:41:43 -0500

bernhk gravatar image

updated 2014-02-17 02:04:49 -0500

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Multicast is not a mandatory with XAP. It is used as a secondary mechanism for lookup service discovery. Unicast is the other mechanism. Both are turned on by default on the client side and service grid side.

Multicast is not used with replication , notification , monitoring or any client activity against the space.

Disabling multicast discovery means you are loosing dynamicy for lookup service location. This means if lookup service fails (very low probably to happen) you will be able to start it only on the machines listed on the LOOKUPLOCATORS list. Client locators should have the same list used.

You should not use global lookup service (default). You should use only local lookup service configuration with the agent with the machines running the lookup service:

gs-agent gsa.global.lus 0 gsa.lus 1 gsa.gsm.global 0 gsa.gsm 1

Machines not running the lookup service should have thier agent started using:

gs-agent gsa.global.lus 0 gsa.lus 0 gsa.gsm.global 0 gsa.gsm 0

I dropped the GSC count from the command above.

If you can't have multicast you should disable it on the client and service grid side. It will save some CPU cycles performed continously.


answered 2014-02-17 07:41:57 -0500

shay hassidim gravatar image
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Thanks for the quick response, Shay. Much appreciated.

bernhk gravatar image bernhk  ( 2014-02-17 18:58:46 -0500 )edit

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Asked: 2014-02-17 01:41:43 -0500

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Last updated: Feb 17 '14