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https://issues.apache.org/jira/browse/HADOOP-17250?focusedWorklogId=612462&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-612462
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ASF GitHub Bot logged work on HADOOP-17250:
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Author: ASF GitHub Bot
Created on: 21/Jun/21 06:40
Start Date: 21/Jun/21 06:40
Worklog Time Spent: 10m
Work Description: mukund-thakur commented on a change in pull request
#3110:
URL: https://github.com/apache/hadoop/pull/3110#discussion_r655111424
##########
File path:
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/constants/FileSystemConfigurations.java
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@@ -62,6 +62,8 @@
public static final boolean DEFAULT_OPTIMIZE_FOOTER_READ = false;
public static final boolean DEFAULT_ALWAYS_READ_BUFFER_SIZE = false;
public static final int DEFAULT_READ_AHEAD_BLOCK_SIZE = 4 * ONE_MB;
+ // Default value of read ahead range.
+ public static final int DEFAULT_READ_AHEAD_RANGE = 64 * ONE_KB; // 64 KB
Review comment:
Ok. This as per suggestion from Rajesh after his experiments.
https://github.com/apache/hadoop/pull/2307#issuecomment-694159756
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Issue Time Tracking
-------------------
Worklog Id: (was: 612462)
Time Spent: 2.5h (was: 2h 20m)
> ABFS: Random read perf improvement
> ----------------------------------
>
> Key: HADOOP-17250
> URL: https://issues.apache.org/jira/browse/HADOOP-17250
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/azure
> Affects Versions: 3.3.0
> Reporter: Sneha Vijayarajan
> Assignee: Mukund Thakur
> Priority: Major
> Labels: abfsactive, pull-request-available
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> Random read if marginally read ahead was seen to improve perf for a TPCH
> query.
>
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