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https://issues.apache.org/jira/browse/HADOOP-17347?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bilahari T H updated HADOOP-17347:
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Description:
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
was:
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 completely.
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
> 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
>
> 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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