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apache / orc / rel/release-1.1.0
tagd38fc385ac4291dd258ba8cbe0d6b7ebf6c75880
taggerOwen O'Malley <omalley@apache.org>Fri Jun 10 10:44:09 2016 -0700
objectfc571e7743d7553814162d8ab95947cb11115c30 
ORC Release 1.1.0
commitfc571e7743d7553814162d8ab95947cb11115c30[log] [tgz]
authorOwen O'Malley <omalley@apache.org>Tue Jun 07 10:26:53 2016 -0700
committerOwen O'Malley <omalley@apache.org>Tue Jun 07 10:41:29 2016 -0700
tree60994f0b419668c56168a1f77860fbc17bf609d0
parentab3f87caf26382a420272b4f5947adf56b5a81eb [diff]
ORC-68. Update storage-api pom to inherit from apache's master pom.

Fixes #36

Signed-off-by: Owen O'Malley <omalley@apache.org>
1 file changed
tree: 60994f0b419668c56168a1f77860fbc17bf609d0
  1. c++/
  2. docker/
  3. examples/
  4. java/
  5. proto/
  6. site/
  7. tools/
  8. .gitignore
  9. CMakeLists.txt
  10. LICENSE
  11. NOTICE
  12. README.md
README.md

Apache ORC

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.

ORC File Library

This project includes both a Java library for reading and writing and a C++ library for reading 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.

Building

  • Install java 1.7 or higher
  • Install maven 3 or higher
  • Install cmake

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