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https://issues.apache.org/jira/browse/HADOOP-17038?focusedWorklogId=550041&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-550041
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ASF GitHub Bot logged work on HADOOP-17038:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 09/Feb/21 04:56
Start Date: 09/Feb/21 04:56
Worklog Time Spent: 10m
Work Description: anoopsjohn commented on a change in pull request #2646:
URL: https://github.com/apache/hadoop/pull/2646#discussion_r572594015
##########
File path:
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AzureBlobFileSystemStore.java
##########
@@ -634,12 +638,15 @@ public AbfsInputStream openFileForRead(final Path path,
final FileSystem.Statist
// Add statistics for InputStream
return new AbfsInputStream(client, statistics,
relativePath, contentLength,
- populateAbfsInputStreamContext(),
+ populateAbfsInputStreamContext(options),
eTag);
}
}
- private AbfsInputStreamContext populateAbfsInputStreamContext() {
+ private AbfsInputStreamContext populateAbfsInputStreamContext(
+ Optional<Configuration> options) {
+ boolean bufferedPreadDisabled = options.isPresent()
Review comment:
Oh ya the map will create new Optional<Boolean> and so we can avoid
Config object create. Ya its fine to create temp Boolean instances and looks
cleaner. Thanks.. Updated in PR.
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Issue Time Tracking
-------------------
Worklog Id: (was: 550041)
Time Spent: 7h 50m (was: 7h 40m)
> Support disabling buffered reads in ABFS positional reads
> ---------------------------------------------------------
>
> Key: HADOOP-17038
> URL: https://issues.apache.org/jira/browse/HADOOP-17038
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Priority: Major
> Labels: HBase, abfsactive, pull-request-available
> Attachments: HBase Perf Test Report.xlsx, screenshot-1.png
>
> Time Spent: 7h 50m
> Remaining Estimate: 0h
>
> Right now it will do a seek to the position , read and then seek back to the
> old position. (As per the impl in the super class)
> In HBase kind of workloads we rely mostly on short preads. (like 64 KB size
> by default). So would be ideal to support a pure pos read API which will not
> even keep the data in a buffer but will only read the required data as what
> is asked for by the caller. (Not reading ahead more data as per the read size
> config)
> Allow an optional boolean config to be specified while opening file for read
> using which buffered pread can be disabled.
> FutureDataInputStreamBuilder openFile(Path path)
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