commit | 84353fbfc447b06e0924024a8e03c1aaebd3e7a5 | [log] [tgz] |
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author | Dongjoon Hyun <dongjoon@apache.org> | Tue Aug 11 11:10:55 2020 -0700 |
committer | GitHub <noreply@github.com> | Tue Aug 11 11:10:55 2020 -0700 |
tree | 141af2bac9b745d3bcc2ac4f56bd2e2b611199fd | |
parent | cd2ce9f2db0a225fd612dcec3409317a1f60a149 [diff] |
ORC-658: Fix NoClassDefFoundError during benchmark data generation (#535) ### What changes were proposed in this pull request? This PR aims to add `hadoop-hdfs` dependency to `bench/core` module. ### Why are the changes needed? This will fix `NoClassDefFoundError` error during data generation. ``` $ java -jar core/target/orc-benchmarks-core-*-uber.jar generate data [WARN ] Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/hdfs/client/HdfsDataOutputStream$SyncFlag ``` ### How was this patch tested? ``` cd java/bench mvn package ./fetch-data.sh java -jar core/target/orc-benchmarks-core-*-uber.jar generate data ```
ORC is a self-describing type-aware columnar file format designed for Hadoop workloads. It is optimized for large streaming reads, but with integrated support for finding required rows quickly. Storing data in a columnar format lets the reader read, decompress, and process only the values that are required for the current query. Because ORC files are type-aware, the writer chooses the most appropriate encoding for the type and builds an internal index as the file is written. Predicate pushdown uses those indexes to determine which stripes in a file need to be read for a particular query and the row indexes can narrow the search to a particular set of 10,000 rows. ORC supports the complete set of types in Hive, including the complex types: structs, lists, maps, and unions.
This project includes both a Java library and a C++ library for reading and writing the Optimized Row Columnar (ORC) file format. The C++ and Java libraries are completely independent of each other and will each read all versions of ORC files. But the C++ library only writes the original (Hive 0.11) version of ORC files, and will be extended in the future.
Releases:
The current build status:
Bug tracking: Apache Jira
The subdirectories are:
To build a release version with debug information:
% mkdir build % cd build % cmake .. % make package % make test-out
To build a debug version:
% mkdir build % cd build % cmake .. -DCMAKE_BUILD_TYPE=DEBUG % make package % make test-out
To build a release version without debug information:
% mkdir build % cd build % cmake .. -DCMAKE_BUILD_TYPE=RELEASE % make package % make test-out
To build only the Java library:
% cd java % mvn package
To build only the C++ library:
% mkdir build % cd build % cmake .. -DBUILD_JAVA=OFF % make package % make test-out