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https://issues.apache.org/jira/browse/HADOOP-17125?focusedWorklogId=492635&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-492635
]
ASF GitHub Bot logged work on HADOOP-17125:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 29/Sep/20 19:39
Start Date: 29/Sep/20 19:39
Worklog Time Spent: 10m
Work Description: viirya commented on a change in pull request #2297:
URL: https://github.com/apache/hadoop/pull/2297#discussion_r496997774
##########
File path: hadoop-common-project/hadoop-common/src/main/native/native.vcxproj
##########
@@ -68,30 +68,13 @@
<IntDir>..\..\..\target\native\$(Configuration)\</IntDir>
<TargetName>hadoop</TargetName>
</PropertyGroup>
- <PropertyGroup>
- <SnappyLib
Condition="Exists('$(CustomSnappyPrefix)\snappy.dll')">$(CustomSnappyPrefix)</SnappyLib>
- <SnappyLib Condition="Exists('$(CustomSnappyPrefix)\lib\snappy.dll') And
'$(SnappyLib)' == ''">$(CustomSnappyPrefix)\lib</SnappyLib>
- <SnappyLib Condition="Exists('$(CustomSnappyPrefix)\bin\snappy.dll') And
'$(SnappyLib)' == ''">$(CustomSnappyPrefix)\bin</SnappyLib>
- <SnappyLib Condition="Exists('$(CustomSnappyLib)') And '$(SnappyLib)' ==
''">$(CustomSnappyLib)</SnappyLib>
- <SnappyInclude
Condition="Exists('$(CustomSnappyPrefix)\snappy.h')">$(CustomSnappyPrefix)</SnappyInclude>
- <SnappyInclude Condition="Exists('$(CustomSnappyPrefix)\include\snappy.h')
And '$(SnappyInclude)' == ''">$(CustomSnappyPrefix)\include</SnappyInclude>
- <SnappyInclude Condition="Exists('$(CustomSnappyInclude)') And
'$(SnappyInclude)' == ''">$(CustomSnappyInclude)</SnappyInclude>
- <SnappyEnabled Condition="'$(SnappyLib)' != '' And '$(SnappyInclude)' !=
''">true</SnappyEnabled>
- <IncludePath Condition="'$(SnappyEnabled)' ==
'true'">$(SnappyInclude);$(IncludePath)</IncludePath>
- <IncludePath
Condition="Exists('$(ZLIB_HOME)')">$(ZLIB_HOME);$(IncludePath)</IncludePath>
Review comment:
Since we remove snappy native code, why do we need to keep this on
windows?
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Issue Time Tracking
-------------------
Worklog Id: (was: 492635)
Time Spent: 20h 40m (was: 20.5h)
> Using snappy-java in SnappyCodec
> --------------------------------
>
> Key: HADOOP-17125
> URL: https://issues.apache.org/jira/browse/HADOOP-17125
> Project: Hadoop Common
> Issue Type: New Feature
> Components: common
> Affects Versions: 3.3.0
> Reporter: DB Tsai
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20h 40m
> Remaining Estimate: 0h
>
> In Hadoop, we use native libs for snappy codec which has several
> disadvantages:
> * It requires native *libhadoop* and *libsnappy* to be installed in system
> *LD_LIBRARY_PATH*, and they have to be installed separately on each node of
> the clusters, container images, or local test environments which adds huge
> complexities from deployment point of view. In some environments, it requires
> compiling the natives from sources which is non-trivial. Also, this approach
> is platform dependent; the binary may not work in different platform, so it
> requires recompilation.
> * It requires extra configuration of *java.library.path* to load the
> natives, and it results higher application deployment and maintenance cost
> for users.
> Projects such as *Spark* and *Parquet* use
> [snappy-java|[https://github.com/xerial/snappy-java]] which is JNI-based
> implementation. It contains native binaries for Linux, Mac, and IBM in jar
> file, and it can automatically load the native binaries into JVM from jar
> without any setup. If a native implementation can not be found for a
> platform, it can fallback to pure-java implementation of snappy based on
> [aircompressor|[https://github.com/airlift/aircompressor/tree/master/src/main/java/io/airlift/compress/snappy]].
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