Multiple

Running multiple instances in parallel

You can have several Minecraft instances serving pool of agents. First you need to start number of Minecraft processes on different ports:

cd ~/Malmo/Minecraft
./launchClient.sh -port 10000
./launchClient.sh -port 10001

Then set up client pool when configuring the environment:

env = gym.make('MinecraftBasic-v0')
env.configure(client_pool=[("localhost", 10000), ("localhost", 10001)])

Malmo will automatically use the first free Minecraft instance from the list.

Actually this is rather inefficient way of pooling Minecraft instances, because each agent starts trying from the first in list. It is therefore suggested to have dedicated Minecraft instance for each agent and use just one address in the list.