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Posted to issues@spark.apache.org by "Yuming Wang (JIRA)" <ji...@apache.org> on 2017/03/27 14:50:41 UTC
[jira] [Updated] (SPARK-20107) Speed up
HadoopMapReduceCommitProtocol#commitJob for many output files
[ https://issues.apache.org/jira/browse/SPARK-20107?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yuming Wang updated SPARK-20107:
--------------------------------
Summary: Speed up HadoopMapReduceCommitProtocol#commitJob for many output files (was: Speed up FileOutputCommitter#commitJob for many output files)
> Speed up HadoopMapReduceCommitProtocol#commitJob for many output files
> ----------------------------------------------------------------------
>
> Key: SPARK-20107
> URL: https://issues.apache.org/jira/browse/SPARK-20107
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: Yuming Wang
>
> Set {{mapreduce.fileoutputcommitter.algorithm.version=2}} to speed up [HadoopMapReduceCommitProtocol#commitJob|https://github.com/apache/spark/blob/v2.1.0/core/src/main/scala/org/apache/spark/internal/io/HadoopMapReduceCommitProtocol.scala#L121] for many output files.
> It can speed up {{11 minutes}} for 216869 output files:
> {code:sql}
> CREATE TABLE tmp.spark_20107 AS SELECT
> category_id,
> product_id,
> track_id,
> concat(
> substr(ds, 3, 2),
> substr(ds, 6, 2),
> substr(ds, 9, 2)
> ) shortDate,
> CASE WHEN actiontype = '0' THEN 'browse' WHEN actiontype = '1' THEN 'fav' WHEN actiontype = '2' THEN 'cart' WHEN actiontype = '3' THEN 'order' ELSE 'invalid actio' END AS type
> FROM
> tmp.user_action
> WHERE
> ds > date_sub('2017-01-23', 730)
> AND actiontype IN ('0','1','2','3');
> {code}
> {code}
> $ hadoop fs -ls /user/hive/warehouse/tmp.db/spark_20107 | wc -l
> 216870
> {code}
> This improvement can effect all cloudera's hadoop cdh5-2.6.0_5.4.0 higher versions(see: [cloudera/hadoop-common@1c12361|https://github.com/cloudera/hadoop-common/commit/1c1236182304d4075276c00c4592358f428bc433] and [cloudera/hadoop-common@16b2de2|https://github.com/cloudera/hadoop-common/commit/16b2de27321db7ce2395c08baccfdec5562017f0]) and apache's hadoop 2.7.0 higher versions.
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