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sleep in thread, not before thread #166

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sleep in thread, not before thread #166

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18 changes: 16 additions & 2 deletions synda/sdt/sddmdefault.py
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,10 @@ def run(cls, tr):
@classmethod
def start_transfer_script(cls,tr):

if hasattr( tr, 'delay' ):
time.sleep( tr.delay )
else:
sdlog.warning("SDDMDEFA-001","delay attribute not set for transfer %s"%(tr,))
sdlog.info("JFPDMDEF-001", "Will download url={}".format(tr.url,))
if sdconfig.fake_download:
tr.status = TRANSFER["status"]['done']
Expand Down Expand Up @@ -346,10 +350,20 @@ def transfers_begin(transfers):

raise

datanode_delays = {}
# An item in datanode_delays will be datanode:delay, e.g. 'esg-dn1.nsc.liu.se':3.
# The delay, in seconds, will precede the attempt to connect to the data node.
# This feature will replace the 1-second 'sleep' which previously separated every call of
# start_transfer_thread. The reason given for it was "not to be too agressive with datanodes".

for tr in transfers:
if tr.data_node not in datanode_delays:
datanode_delays[tr.data_node] = 0
else:
datanode_delays[tr.data_node] += 1
tr.delay = datanode_delays[tr.data_node]

start_transfer_thread(tr)
# this sleep is not to be too agressive with datanodes
time.sleep(1)


def can_leave():
Expand Down