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https://issues.apache.org/jira/browse/HADOOP-17347?focusedWorklogId=522055&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-522055
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ASF GitHub Bot logged work on HADOOP-17347:
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Author: ASF GitHub Bot
Created on: 09/Dec/20 05:47
Start Date: 09/Dec/20 05:47
Worklog Time Spent: 10m
Work Description: bilaharith commented on a change in pull request #2464:
URL: https://github.com/apache/hadoop/pull/2464#discussion_r539025293
##########
File path:
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AbfsConfiguration.java
##########
@@ -517,6 +527,14 @@ public int getWriteBufferSize() {
return this.writeBufferSize;
}
+ public boolean readSmallFilesCompletely() {
Review comment:
Yes, if 100 MB is set as buffer size, current logic is forcing a single
server read request for 100 MB.
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Issue Time Tracking
-------------------
Worklog Id: (was: 522055)
Time Spent: 2h 20m (was: 2h 10m)
> ABFS: Read optimizations
> ------------------------
>
> Key: HADOOP-17347
> URL: https://issues.apache.org/jira/browse/HADOOP-17347
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/azure
> Affects Versions: 3.4.0
> Reporter: Bilahari T H
> Assignee: Bilahari T H
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> Optimize read performance for the following scenarios
> # Read small files completely
> Files that are of size smaller than the read buffer size can be considered
> as small files. In case of such files it would be better to read the full
> file into the AbfsInputStream buffer.
> # Read last block if the read is for footer
> If the read is for the last 8 bytes, read the full file.
> This will optimize reads for parquet files. [Parquet file
> format|https://www.ellicium.com/parquet-file-format-structure/]
> Both these optimizations will be present under configs as follows
> # fs.azure.read.smallfilescompletely
> # fs.azure.read.optimizefooterread
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