Íñigo Goiri created HDFS-12861:
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Summary: Track speed in DFSClient
Key: HDFS-12861
URL: https://issues.apache.org/jira/browse/HDFS-12861
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Íñigo Goiri
Sometimes we get slow jobs because of the access to HDFS. However, is hard to
tell what is the actual speed. We propose to add a log line with something like:
2017-11-19 09:55:26,309 INFO [main] hdfs.DFSClient: blk_1107222019_38144502
READ 129500B in 7ms 17.6MB/s
2017-11-27 19:01:04,141 INFO [DataStreamer for file
/hdfs-federation/stats/2017/11/27/BN2SCH070021402_85/1511838000000.json]
hdfs.DFSClient: blk_1135792057_86833357 WRITE 131072B in 10ms 12.5MB/s
2017-11-27 19:01:14,219 INFO [DataStreamer for file
/hdfs-federation/stats/2017/11/27/BN2SCH070021402_85/1511838000000.json]
hdfs.DFSClient: blk_1135792069_86833369 WRITE 131072B in 12ms 10.4MB/s
2017-11-27 19:01:24,282 INFO [DataStreamer for file
/hdfs-federation/stats/2017/11/27/BN2SCH070021402_85/1511838000000.json]
hdfs.DFSClient: blk_1135792081_86833381 WRITE 131072B in 11ms 11.4MB/s
2017-11-27 19:01:34,330 INFO [DataStreamer for file
/hdfs-federation/stats/2017/11/27/BN2SCH070021402_85/1511838000000.json]
hdfs.DFSClient: blk_1135792093_86833393 WRITE 131072B in 11ms 11.4MB/s
2017-11-27 19:01:44,408 INFO [DataStreamer for file
/hdfs-federation/stats/2017/11/27/BN2SCH070021402_85/1511838000000.json]
hdfs.DFSClient: blk_1135792105_86833405 WRITE 131072B in 11ms 11.4MB/s
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