[
https://issues.apache.org/jira/browse/BEAM-2810?focusedWorklogId=115307&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-115307
]
ASF GitHub Bot logged work on BEAM-2810:
----------------------------------------
Author: ASF GitHub Bot
Created on: 25/Jun/18 05:35
Start Date: 25/Jun/18 05:35
Worklog Time Spent: 10m
Work Description: ryan-williams commented on a change in pull request
#5496: [BEAM-2810] use fastavro in Avro IO
URL: https://github.com/apache/beam/pull/5496#discussion_r197653865
##########
File path: sdks/python/apache_beam/examples/avro_bitcoin.py
##########
@@ -0,0 +1,163 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""Collect statistics on transactions in a public bitcoin dataset that was
+exported to avro"""
+
+from __future__ import absolute_import
+
+import argparse
+import logging
+
+import avro
+
+import apache_beam as beam
+from apache_beam.io.avroio import ReadFromAvro
+from apache_beam.io.avroio import WriteToAvro
+from apache_beam.metrics import Metrics
+from apache_beam.options.pipeline_options import PipelineOptions
+from apache_beam.options.pipeline_options import SetupOptions
+
+
+class BitcoinTxnCountDoFn(beam.DoFn):
+ """Count inputs and outputs per transaction"""
+
+ def __init__(self):
+ super(BitcoinTxnCountDoFn, self).__init__()
+ self.txn_counter = Metrics.counter(self.__class__, 'txns')
+ self.inputs_dist = Metrics.distribution(self.__class__, 'inputs_per_txn')
+ self.outputs_dist = Metrics.distribution(self.__class__, 'outputs_per_txn')
+ self.output_amts_dist = Metrics.distribution(self.__class__, 'output_amts')
+ self.txn_amts_dist = Metrics.distribution(self.__class__, 'txn_amts')
+
+ def process(self, elem):
+ """Update counters and distributions, and filter and sum somem fields"""
Review comment:
done
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
Issue Time Tracking
-------------------
Worklog Id: (was: 115307)
Time Spent: 2h 50m (was: 2h 40m)
> Consider a faster Avro library in Python
> ----------------------------------------
>
> Key: BEAM-2810
> URL: https://issues.apache.org/jira/browse/BEAM-2810
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Eugene Kirpichov
> Assignee: Ryan Williams
> Priority: Major
> Time Spent: 2h 50m
> Remaining Estimate: 0h
>
> https://stackoverflow.com/questions/45870789/bottleneck-on-data-source
> Seems like this job is reading Avro files (exported by BigQuery) at about 2
> MB/s.
> We use the standard Python "avro" library which is apparently known to be
> very slow (10x+ slower than Java)
> http://apache-avro.679487.n3.nabble.com/Avro-decode-very-slow-in-Python-td4034422.html,
> and there are alternatives e.g. https://pypi.python.org/pypi/fastavro/
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
