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Posted to common-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2016/05/01 12:34:13 UTC
[jira] [Commented] (HADOOP-13028) add low level counter metrics for
S3A; use in read performance tests
[ https://issues.apache.org/jira/browse/HADOOP-13028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15265701#comment-15265701 ]
Steve Loughran commented on HADOOP-13028:
-----------------------------------------
+there's another contained patch, HADOOP-13058 , about enabling multipart upload failing against R/O buckets. This was blocking test runs against a read only AWS dataset, fixed by catching and downgrading the fault to a warn. You can't upload to a read only bucket anyway, after all
> add low level counter metrics for S3A; use in read performance tests
> --------------------------------------------------------------------
>
> Key: HADOOP-13028
> URL: https://issues.apache.org/jira/browse/HADOOP-13028
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3, metrics
> Affects Versions: 2.8.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Attachments: HADOOP-13028-001.patch, HADOOP-13028-002.patch, HADOOP-13028-004.patch, HADOOP-13028-005.patch, HADOOP-13028-006.patch, HADOOP-13028-007.patch, org.apache.hadoop.fs.s3a.scale.TestS3AInputStreamPerformance-output.txt, org.apache.hadoop.fs.s3a.scale.TestS3AInputStreamPerformance-output.txt
>
>
> against S3 (and other object stores), opening connections can be expensive, closing connections may be expensive (a sign of a regression).
> S3A FS and individual input streams should have counters of the # of open/close/failure+reconnect operations, timers of how long things take. This can be used downstream to measure efficiency of the code (how often connections are being made), connection reliability, etc.
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