the four_billion_rows.py replicates the state farm fail
to run (can dispatch from any matchine at 0xdata)

cd testdir_0xdata_only
python test_four_billion_rows.py -cj ../testdir_hosts/pytest_config-161-164.json
I hardwired the java_heap_GB to 100GB in the test

may fail on single machine too. use different config json
Merge branch 'master' of github.com:0xdata/h2o