Source code for mxnet.kvstore_server

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# coding: utf-8
"""A server node for the key value store."""
from __future__ import absolute_import
import ctypes
import sys
import pickle
import logging
from .base import _LIB, check_call
from .kvstore import create

[docs]class KVStoreServer(object): """The key-value store server.""" def __init__(self, kvstore): """Initialize a new KVStoreServer. Parameters ---------- kvstore : KVStore """ self.kvstore = kvstore self.handle = kvstore.handle self.init_logginig = False def _controller(self): """Return the server controller.""" def server_controller(cmd_id, cmd_body, _): """Server controler.""" if not self.init_logginig: # the reason put the codes here is because we cannot get # kvstore.rank earlier head = '%(asctime)-15s Server[' + str( self.kvstore.rank) + '] %(message)s' logging.basicConfig(level=logging.DEBUG, format=head) self.init_logginig = True if cmd_id == 0: try: optimizer = pickle.loads(cmd_body) except: raise self.kvstore.set_optimizer(optimizer) else: print("server %d, unknown command (%d, %s)" % ( self.kvstore.rank, cmd_id, cmd_body)) return server_controller
[docs] def run(self): """Run the server, whose behavior is like. >>> while receive(x): ... if is_command x: controller(x) ... else if is_key_value x: updater(x) """ _ctrl_proto = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p, ctypes.c_void_p) check_call(_LIB.MXKVStoreRunServer(self.handle, _ctrl_proto(self._controller()), None))
def _init_kvstore_server_module(): """Start server/scheduler.""" is_worker = ctypes.c_int() check_call(_LIB.MXKVStoreIsWorkerNode(ctypes.byref(is_worker))) if is_worker.value == 0: kvstore = create('dist') server = KVStoreServer(kvstore) sys.exit() _init_kvstore_server_module()