[
https://issues.apache.org/jira/browse/HADOOP-13453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15996530#comment-15996530
]
Steve Loughran commented on HADOOP-13453:
-----------------------------------------
Why not take that list, create a new JIRA off HADOOP-13345 "add more s3guard
metrics" and suggest those as the start.
One interesting one to see if we could detect would be mismatches between
s3guard and the underlying object store: if we can observe inconsistencies
(how?) then that should be measured. The S3mper blog posts looks at how netflix
detected consistency issues in S3 that way
> S3Guard: Instrument new functionality with Hadoop metrics.
> ----------------------------------------------------------
>
> Key: HADOOP-13453
> URL: https://issues.apache.org/jira/browse/HADOOP-13453
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Reporter: Chris Nauroth
> Assignee: Ai Deng
> Fix For: HADOOP-13345
>
> Attachments: HADOOP-13453-HADOOP-13345-001.patch,
> HADOOP-13453-HADOOP-13345-002.patch, HADOOP-13453-HADOOP-13345-003.patch,
> HADOOP-13453-HADOOP-13345-004.patch, HADOOP-13453-HADOOP-13345-005.patch
>
>
> Provide Hadoop metrics showing operational details of the S3Guard
> implementation.
> The metrics will be implemented in this ticket:
> ● S3GuardRechecksNthPercentileLatency (MutableQuantiles) Percentile time
> spent
> in rechecks attempting to achieve consistency. Repeated for multiple
> percentile values
> of N. This metric is an indicator of the additional latency cost of running
> S3A with
> S3Guard.
> ● S3GuardRechecksNumOps (MutableQuantiles) Number of times a consistency
> recheck was required while attempting to achieve consistency.
> ● S3GuardStoreNthPercentileLatency (MutableQuantiles) Percentile time
> spent in
> operations against the consistent store, including both write operations
> during file system
> mutations and read operations during file system consistency checks. Repeated
> for
> multiple percentile values of N. This metric is an indicator of latency to
> the consistent
> store implementation.
> ● S3GuardConsistencyStoreNumOps (MutableQuantiles) Number of operations
> against the consistent store, including both write operations during file
> system mutations
> and read operations during file system consistency checks.
> ● S3GuardConsistencyStoreFailures (MutableCounterLong) Number of failures
> during operations against the consistent store implementation.
> ● S3GuardConsistencyStoreTimeouts (MutableCounterLong) Number of timeouts
> during operations against the consistent store implementation.
> ● S3GuardInconsistencies (MutableCounterLong) C ount of times S3Guard
> failed to
> achieve consistency, even after exhausting all rechecks. A high count may
> indicate
> unexpected outofband modification of the S3 bucket contents, such as by an
> external
> tool that does not make corresponding updates to the consistent store.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
