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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2020/07/03 16:42:48 UTC
[GitHub] [hadoop] steveloughran commented on pull request #2069: HADOOP-16830. IOStatistics API.
steveloughran commented on pull request #2069:
URL: https://github.com/apache/hadoop/pull/2069#issuecomment-653619415
latest patch wires up stats collection from the workers on an s3a committer job, marshalls them as json in .pending/.pendingset files and then finally aggregates them into the _SUCCESS job summary file. Here's an example of a test run.
```json
2020-07-03 16:47:08,981 [JUnit-ITestMagicCommitProtocol-testOutputFormatIntegration] INFO commit.AbstractCommitITest (AbstractCommitITest.java:loadSuccessFile(503)) - Loading committer success file s3a://stevel-ireland/test/ITestMagicCommitProtocol-testOutputFormatIntegration/_SUCCESS. Actual contents=
{
"name" : "org.apache.hadoop.fs.s3a.commit.files.SuccessData/1",
"timestamp" : 1593791227415,
"date" : "Fri Jul 03 16:47:07 BST 2020",
"hostname" : "stevel-mbp15-13176.local",
"committer" : "magic",
"description" : "Task committer attempt_200707120821_0001_m_000000_0",
...
"diagnostics" : {
"fs.s3a.authoritative.path" : "",
"fs.s3a.metadatastore.impl" : "org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore",
"fs.s3a.committer.magic.enabled" : "true",
"fs.s3a.metadatastore.authoritative" : "false"
},
"filenames" : [ "/test/ITestMagicCommitProtocol-testOutputFormatIntegration/part-m-00000" ],
"iostatistics" : {
"counters" : {
"committer_bytes_committed" : 4,
"committer_bytes_uploaded" : 0,
"committer_commits_aborted" : 0,
"committer_commits_completed" : 1,
"committer_commits_created" : 0,
"committer_commits_failed" : 0,
"committer_commits_reverted" : 0,
"committer_jobs_completed" : 1,
"committer_jobs_failed" : 0,
"committer_tasks_completed" : 1,
"committer_tasks_failed" : 0,
"stream_write_block_uploads" : 1,
"stream_write_block_uploads_data_pending" : 0,
"stream_write_bytes" : 4,
"stream_write_exceptions" : 0,
"stream_write_exceptions_completing_uploads" : 0,
"stream_write_queue_duration" : 0,
"stream_write_total_data" : 4,
"stream_write_total_time" : 0
},
"gauges" : {
"stream_write_block_uploads_data_pending" : 4,
"stream_write_block_uploads_pending" : 0,
},
"minimums" : { },
"maximums" : { },
"meanStatistics" : { }
}
}
```
I'm in a good mood here. Time for others to look at.
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