Skip to content

README.markdown

Latest commit

 

History

History
33 lines (22 loc) · 1.59 KB

README.markdown

File metadata and controls

33 lines (22 loc) · 1.59 KB

OmnitureDataFileInputFormat

what is it

A Hadoop input format for Omniture daily data files (hit_data.tsv). Works identically to TextInputFormat except for the fact that it uses a EscapedLineReader which gets around Omniture's pesky escaped tabs and newlines.

It supports both the older style InputFormat API org.apache.hadoop.mapred as well as the newer org.apache.hadoop.mapreduce API which allows compatibility with hive 0.7.0 which doesn't suppor the newer InputFormat API.

keys and values

  • Keys are LongWritable and represent the byte offset of the record in the file.
  • Values are Text with all instances of \t, \n or \r\n replaced with a space (so that hive/pig can correctly split the columns)

to build

Include

  • hadoop-0.20.2-core.jar
  • commons-logging-1.0.4.jar

in your classpath (sample provided in this project, but you'll likely need to change the path) and then create your JARs and make them available to your Hadoop cluster.

usage in hive

To use OmnitureDataFileInputFormat in Hive, simply specify it during your create statement.

CREATE TABLE (...)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t' 
STORED AS INPUTFORMAT 'com.tgam.hadoop.OmnitureDataFileInputFormat' OUTPUTFORMAT 'org.apache.hadoop.hive.ql.io.IgnoreKeyTextOutputFormat';

usage in pig

To use OmnitureDataFileInputFormat in a Pig script, you will have to register both the InputFormat as well as the UDF OmnitureTextLoader.

REGISTER path/to/jar/OmnitureDataInputFileFormat.jar
REGISTER path/to/jar/OmnitureTextLoader.jar
...