leo_pod is an Erlang worker pool manager. It is implemented no to use ETS (Erlang Term Storage). This is because we met a problem of ETS when we run it on high spec machines.

See files under the test/ directory in the repository.

    %% Prepare
    PodName = 'first_leo_pod',
    PodSize     = 8,
    MaxOverflow = 16,
    ModName     = 'leo_pod_mod',
    WorkerArgs  = [{protocol, tcp},
                   {host, "127.0.0.1"},
                   {port, 8080}],
    leo_pod:start_link(PodName, PodSize, MaxOverflow, ModName, WorkerArgs),

    %% Execute - [checkout > call > checkin]
    {ok, Worker} = leo_pod:checkout(PodName),
    {ok, _Reply} = gen_server:call(Worker, {echo, <<"Hello Hal,">>}),
    ok = leo_pod:checkin(PodName, Worker),
    ok.

leo_pod is used in leo_rpc library. It is used to mangage the number of process of RPC clients for each node. It is necessary because some OS has the limit for the number of file descriptors and therefore connections to the other nodes.

leo_pod's license is "Apache License Version 2.0"

LeoProject/LeoFS is sponsored by Rakuten, Inc. and supported by Rakuten Institute of Technology.