Github user james-sirota commented on the issue:
https://github.com/apache/incubator-metron/pull/279
+1 to this. Here is why. If fulldev can only support 2 running parser
topologies I think it makes sense to let a user pick which 2 they want. The
intention of vagrant dev images is to spin them up to test a PR and then
destroy them. We generally only need a few topologies for that and it is not
the intention to use vagrant images to simulate a full running system. By
having only 2 topologies started by default we will avoid 90% of problems
people have when they spin up the vagrant images and run out of memory. With
that said I will also document what needs to be done to spin up the image with
4 topologies, but put a disclaimer to start at their own risk.
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