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This defines standard option and values for the openFile() builder API for opening a file: fs.option.openfile.read.policy A list of the desired read policy, in preferred order. standard values are adaptive, default, random, sequential, vector, whole-file fs.option.openfile.length How long the file is. fs.option.openfile.split.start start of a task's split fs.option.openfile.split.end end of a task's split These can be used by filesystem connectors to optimize their reading of the source file, including but not limited to * skipping existence/length probes when opening a file * choosing a policy for prefetching/caching data The hadoop shell commands which read files all declare "whole-file" and "sequential", as appropriate. Contributed by Steve Loughran. Change-Id: Ia290f79ea7973ce8713d4f90f1315b24d7a23da1 |
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| hadoop-common-project | ||
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| LICENSE.txt | ||
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| NOTICE.txt | ||
| README.txt | ||
| pom.xml | ||
| start-build-env.sh | ||
README.txt
For the latest information about Hadoop, please visit our website at: http://hadoop.apache.org/ and our wiki, at: https://cwiki.apache.org/confluence/display/HADOOP/