presto on ray 源码

# Usage > $ ./presto-mgr.py --help Usage: presto-mgr [options] command Commands: add_worker, del_worker, stop, start, status, coordinator, connect Options: -h, --help show this help message and exit -n CLUSTER_NAME, --cluster-name=CLUSTER_NAME -a RAY_ADDR, --ray-addr=RAY_ADDR -c PRESTO_CONFIG, --config=PRESTO_CONFIG # add_worker: add a new worker to a cluster # del_worker: remov