1) Starting several nodes in one JVM usually useful for testing not in production
2) If you need to launch several nodes at onces OOTB you could create an issue in Ignite JIRA and submit a patch (or wait for someone to do it). See https://ignite.incubator.apache.org/community/contribute.html#contribute -- Alexey Kuznetsov GridGain Systems www.gridgain.com
