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https://issues.apache.org/jira/browse/BEAM-3645?focusedWorklogId=281084&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-281084
]
ASF GitHub Bot logged work on BEAM-3645:
----------------------------------------
Author: ASF GitHub Bot
Created on: 23/Jul/19 15:20
Start Date: 23/Jul/19 15:20
Worklog Time Spent: 10m
Work Description: robertwb commented on pull request #8979: [BEAM-3645]
add multiplexing for python FnApiRunner
URL: https://github.com/apache/beam/pull/8979#discussion_r306368474
##########
File path: sdks/python/apache_beam/runners/portability/fn_api_runner.py
##########
@@ -92,34 +140,56 @@ class
BeamFnControlServicer(beam_fn_api_pb2_grpc.BeamFnControlServicer):
_DONE_MARKER = object()
def __init__(self):
- self._push_queue = queue.Queue()
- self._futures_by_id = dict()
- self._read_thread = threading.Thread(
- name='beam_control_read', target=self._read)
+ self._lock = threading.Lock()
self._uid_counter = 0
self._state = self.UNSTARTED_STATE
- self._lock = threading.Lock()
+ # following self._req_* variables are used for debugging purpose, data is
+ # added only when self._log_req is True.
+ self._req_sent = collections.defaultdict(int)
+ self._req_worker_mapping = {}
+ self._log_req = True if logging.getLevelName(
+ logging.getLogger().getEffectiveLevel()) == 'DEBUG' else False
+ self._conn_handler = ConnectionHandler()
def Control(self, iterator, context):
with self._lock:
if self._state == self.DONE_STATE:
return
else:
self._state = self.STARTED_STATE
- self._inputs = iterator
- # Note: We only support one client for now.
- self._read_thread.start()
+
+ worker_id = dict(context.invocation_metadata()).get('worker_id')
+ if not worker_id:
+ raise RuntimeError('All workers communicate through gRPC should have '
+ 'worker_id. Received None.')
+
+ control_conn = self._conn_handler.get_conn_handler_by_id(worker_id)
+ control_conn.set_input(iterator)
+ if not control_conn.read_thread.isAlive():
+ control_conn.read_thread.start()
+
while True:
- to_push = self._push_queue.get()
+ to_push = control_conn.get_req()
if to_push is self._DONE_MARKER:
return
yield to_push
+ if self._log_req:
+ self._req_sent[to_push.instruction_id] += 1
+
+ def _dispatch(self, item, dest_worker_id, future):
Review comment:
You should be able to get rid of `BeamFnControlServicer.{push,_dispatch}`.
Instead, to push a message, users would call
`control_servicer.get_connection(worker_id).push(request)`. Most of the time
they wouldn't actually even bother holding a handle to the control_servicer,
rather they'd just hold a ControlConnection and do
`self._control_connection.push(...)`.
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Issue Time Tracking
-------------------
Worklog Id: (was: 281084)
Time Spent: 27h 40m (was: 27.5h)
> Support multi-process execution on the FnApiRunner
> --------------------------------------------------
>
> Key: BEAM-3645
> URL: https://issues.apache.org/jira/browse/BEAM-3645
> Project: Beam
> Issue Type: Improvement
> Components: sdk-py-core
> Affects Versions: 2.2.0, 2.3.0
> Reporter: Charles Chen
> Assignee: Hannah Jiang
> Priority: Major
> Fix For: 2.15.0
>
> Time Spent: 27h 40m
> Remaining Estimate: 0h
>
> https://issues.apache.org/jira/browse/BEAM-3644 gave us a 15x performance
> gain over the previous DirectRunner. We can do even better in multi-core
> environments by supporting multi-process execution in the FnApiRunner, to
> scale past Python GIL limitations.
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