def run(self):
try:
# Copy phase
self.manager.set_phase('copy')
api.start_migration(self.collection_name, self.shard_key,
self.new_location)
oplog_pos = _get_oplog_pos(self.collection_name, self.shard_key)
_do_copy(self.collection_name, self.shard_key, self.manager)
# Sync phase
self.manager.set_phase('sync')
start_sync_time = time.time()
api.set_shard_to_migration_status(
self.collection_name, self.shard_key,
metadata.ShardStatus.MIGRATING_SYNC)
oplog_pos = _sync_from_oplog(self.collection_name, self.shard_key,
oplog_pos)
# Ensure that the sync has taken at least as long as our caching
# time to ensure that all writes will get paused at approximately
# the same time.
while time.time() < start_sync_time + api.get_caching_duration():
time.sleep(0.05)
oplog_pos = _sync_from_oplog(self.collection_name,
self.shard_key, oplog_pos)
# Now all the caching of metadata should be stopped for this shard.
# We can flip to being paused at destination and wait ~100ms for any
# pending updates/inserts to be performed. If these are taking
# longer than 100ms then you are in a bad place and should rethink
# sharding.
api.set_shard_to_migration_status(
self.collection_name, self.shard_key,
metadata.ShardStatus.POST_MIGRATION_PAUSED_AT_DESTINATION)
time.sleep(0.1)
# Sync the oplog one final time to catch any writes that were
# performed during the pause
_sync_from_oplog(self.collection_name, self.shard_key, oplog_pos)
# Delete phase
self.manager.set_phase('delete')
api.set_shard_to_migration_status(
self.collection_name, self.shard_key,
metadata.ShardStatus.POST_MIGRATION_DELETE)
_delete_source_data(self.collection_name, self.shard_key,
self.manager)
api.set_shard_at_rest(self.collection_name,
self.shard_key,
self.new_location,
force=True)
self.manager.set_phase('complete')
except:
self.exception = sys.exc_info()
raise
finally:
close_thread_connections(threading.current_thread())
def run(self):
try:
blue('* Starting migration')
api.start_migration(self.collection_name, self.shard_key,
self.new_location)
# Copy phase
blue('* Doing copy')
oplog_pos = _get_oplog_pos(self.collection_name, self.shard_key)
_do_copy(self.collection_name, self.shard_key,
self.insert_throttle)
# Sync phase
blue('* Initial oplog sync')
start_sync_time = time.time()
api.set_shard_to_migration_status(
self.collection_name, self.shard_key,
metadata.ShardStatus.MIGRATING_SYNC)
oplog_pos = _sync_from_oplog(self.collection_name, self.shard_key,
oplog_pos)
# Ensure that the sync has taken at least as long as our caching time
# to ensure that all writes will get paused at approximately the same
# time.
while time.time() < start_sync_time + api.get_caching_duration():
time.sleep(0.05)
oplog_pos = _sync_from_oplog(self.collection_name,
self.shard_key, oplog_pos)
# Now all the caching of metadata should be stopped for this shard.
# We can flip to being paused at destination and wait ~100ms for any
# pending updates/inserts to be performed. If these are taking longer
# than 100ms then you are in a bad place and should rethink sharding.
blue('* Pausing at destination')
api.set_shard_to_migration_status(
self.collection_name, self.shard_key,
metadata.ShardStatus.POST_MIGRATION_PAUSED_AT_DESTINATION)
time.sleep(0.1)
blue('* Syncing oplog once more')
_sync_from_oplog(self.collection_name, self.shard_key, oplog_pos)
# Delete phase
blue('* Doing deletion')
api.set_shard_to_migration_status(
self.collection_name, self.shard_key,
metadata.ShardStatus.POST_MIGRATION_DELETE)
_delete_source_data(self.collection_name,
self.shard_key,
delete_throttle=self.delete_throttle)
api.set_shard_at_rest(self.collection_name,
self.shard_key,
self.new_location,
force=True)
blue('* Done')
except:
self.exception = sys.exc_info()
raise
def run(self):
try:
blue('* Starting migration')
api.start_migration(
self.collection_name, self.shard_key, self.new_location)
# Copy phase
blue('* Doing copy')
oplog_pos = _get_oplog_pos(self.collection_name, self.shard_key)
_do_copy(self.collection_name, self.shard_key, self.insert_throttle)
# Sync phase
blue('* Initial oplog sync')
start_sync_time = time.time()
api.set_shard_to_migration_status(
self.collection_name, self.shard_key, metadata.ShardStatus.MIGRATING_SYNC)
oplog_pos = _sync_from_oplog(
self.collection_name, self.shard_key, oplog_pos)
# Ensure that the sync has taken at least as long as our caching time
# to ensure that all writes will get paused at approximately the same
# time.
while time.time() < start_sync_time + api.get_caching_duration():
time.sleep(0.05)
oplog_pos = _sync_from_oplog(
self.collection_name, self.shard_key, oplog_pos)
# Now all the caching of metadata should be stopped for this shard.
# We can flip to being paused at destination and wait ~100ms for any
# pending updates/inserts to be performed. If these are taking longer
# than 100ms then you are in a bad place and should rethink sharding.
blue('* Pausing at destination')
api.set_shard_to_migration_status(
self.collection_name, self.shard_key,
metadata.ShardStatus.POST_MIGRATION_PAUSED_AT_DESTINATION)
time.sleep(0.1)
blue('* Syncing oplog once more')
_sync_from_oplog(
self.collection_name, self.shard_key, oplog_pos)
# Delete phase
blue('* Doing deletion')
api.set_shard_to_migration_status(
self.collection_name, self.shard_key,
metadata.ShardStatus.POST_MIGRATION_DELETE)
_delete_source_data(
self.collection_name, self.shard_key,
delete_throttle=self.delete_throttle)
api.set_shard_at_rest(
self.collection_name, self.shard_key, self.new_location,
force=True)
blue('* Done')
except:
self.exception = sys.exc_info()
raise
def run(self):
try:
# Copy phase
self.manager.set_phase('copy')
api.start_migration(
self.collection_name, self.shard_key, self.new_location)
oplog_pos = _get_oplog_pos(self.collection_name, self.shard_key)
_do_copy(self.collection_name, self.shard_key, self.manager)
# Sync phase
self.manager.set_phase('sync')
start_sync_time = time.time()
api.set_shard_to_migration_status(
self.collection_name, self.shard_key, metadata.ShardStatus.MIGRATING_SYNC)
oplog_pos = _sync_from_oplog(
self.collection_name, self.shard_key, oplog_pos)
# Ensure that the sync has taken at least as long as our caching time
# to ensure that all writes will get paused at approximately the same
# time.
while time.time() < start_sync_time + api.get_caching_duration():
time.sleep(0.05)
oplog_pos = _sync_from_oplog(
self.collection_name, self.shard_key, oplog_pos)
# Now all the caching of metadata should be stopped for this shard.
# We can flip to being paused at destination and wait ~100ms for any
# pending updates/inserts to be performed. If these are taking longer
# than 100ms then you are in a bad place and should rethink sharding.
api.set_shard_to_migration_status(
self.collection_name, self.shard_key,
metadata.ShardStatus.POST_MIGRATION_PAUSED_AT_DESTINATION)
time.sleep(0.1)
# Sync the oplog one final time to catch any writes that were
# performed during the pause
_sync_from_oplog(
self.collection_name, self.shard_key, oplog_pos)
# Delete phase
self.manager.set_phase('delete')
api.set_shard_to_migration_status(
self.collection_name, self.shard_key,
metadata.ShardStatus.POST_MIGRATION_DELETE)
_delete_source_data(
self.collection_name, self.shard_key, self.manager)
api.set_shard_at_rest(
self.collection_name, self.shard_key, self.new_location,
force=True)
self.manager.set_phase('complete')
except:
close_thread_connections(threading.current_thread())
self.exception = sys.exc_info()
raise
