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https://issues.apache.org/jira/browse/HADOOP-17281?focusedWorklogId=493316&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-493316
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ASF GitHub Bot logged work on HADOOP-17281:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 01/Oct/20 06:56
Start Date: 01/Oct/20 06:56
Worklog Time Spent: 10m
Work Description: mukund-thakur opened a new pull request #2354:
URL: https://github.com/apache/hadoop/pull/2354
Ran the new test using ap-south-1 bucket.
O/P-
`(ContractTestUtils.java:end(1847)) - Duration of listing 1000 files using
listFiles() api with batch size of 10 including 10ms of processing time for
each file: 12,223,848,028 nS
2020-10-01 12:19:28,811
[JUnit-testMultiPagesListingPerformanceAndCorrectness] INFO
contract.ContractTestUtils (ContractTestUtils.java:end(1847)) - Duration of
listing 1000 files using listStatus() api with batch size of 10 including 10ms
of processing time for each file: 15,988,037,357 nS
2020-10-01 12:19:41,050
[JUnit-testMultiPagesListingPerformanceAndCorrectness] INFO
contract.ContractTestUtils (ContractTestUtils.java:end(1847)) - Duration of
listing 1000 files using listStatusIterator() api with batch size of 10
including 10ms of processing time for each file: 12,214,813,052 nS`
From the logs we can see that time taken using listStatusIterator() and
listFiles() matches and is less than listStatus().
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Issue Time Tracking
-------------------
Worklog Id: (was: 493316)
Remaining Estimate: 0h
Time Spent: 10m
> Implement FileSystem.listStatusIterator() in S3AFileSystem
> ----------------------------------------------------------
>
> Key: HADOOP-17281
> URL: https://issues.apache.org/jira/browse/HADOOP-17281
> Project: Hadoop Common
> Issue Type: Task
> Components: fs/s3
> Affects Versions: 3.3.0
> Reporter: Mukund Thakur
> Assignee: Mukund Thakur
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Currently S3AFileSystem only implements listStatus() api which returns an
> array. Once we implement the listStatusIterator(), clients can benefit from
> the async listing done recently
> https://issues.apache.org/jira/browse/HADOOP-17074 by performing some tasks
> on files while iterating them.
>
> CC [~stevel]
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