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Transfer and run global explorers in parallel.

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This commit is contained in:
Darko Poljak 2016-08-12 21:14:56 +02:00
commit 5f436f21b8
6 changed files with 131 additions and 13 deletions
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43
cdist/core/explorer.py
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@ -69,7 +69,7 @@ class Explorer(object):
def __init__(self, target_host, local, remote, jobs=None):
self.target_host = target_host
self.log = logging.getLogger(target_host)
self._open_logger()
self.local = local
self.remote = remote
@ -80,6 +80,9 @@ class Explorer(object):
self._type_explorers_transferred = []
self.jobs = jobs
def _open_logger(self):
self.log = logging.getLogger(self.target_host)
# global
def list_global_explorer_names(self):
@ -112,24 +115,46 @@ class Explorer(object):
def _run_global_explorers_parallel(self, out_path):
self.log.info("Running global explorers in {} parallel jobs".format(
self.jobs))
self.log.info("Starting multiprocessing Pool")
self.log.debug("Multiprocessing start method is {}".format(
multiprocessing.get_start_method()))
self.log.info(("Starting multiprocessing Pool for global "
"explorers run"))
with multiprocessing.Pool(self.jobs) as pool:
self.log.info("Starting async global explorer run")
self.log.info("Starting async for global explorer run")
results = [
pool.apply_async(self._run_global_explorer, (e, out_path,))
for e in self.list_global_explorer_names()
]
self.log.info("Waiting async global explorer run results")
self.log.info("Waiting async results for global explorer runs")
for r in results:
r.get()
self.log.info("Async global explorer run finished")
self.log.info("Multiprocessing Pool finished")
r.get() # self._run_global_explorer returns None
self.log.info(("Multiprocessing run for global explorers "
"finished"))
# logger is not pickable, so remove it when we pickle
def __getstate__(self):
state = self.__dict__.copy()
if 'log' in state:
del state['log']
return state
# recreate logger when we unpickle
def __setstate__(self, state):
self.__dict__.update(state)
self._open_logger()
def transfer_global_explorers(self):
"""Transfer the global explorers to the remote side."""
self.remote.mkdir(self.remote.global_explorer_path)
self.remote.transfer(self.local.global_explorer_path,
self.remote.global_explorer_path)
if self.jobs is None:
self.remote.transfer(self.local.global_explorer_path,
self.remote.global_explorer_path)
else:
self.remote.transfer_dir_parallel(
self.local.global_explorer_path,
self.remote.global_explorer_path,
self.jobs)
self.remote.run(["chmod", "0700",
"%s/*" % (self.remote.global_explorer_path)])