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BlockCachingCommand
John King edited this page Sep 2, 2016
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A BlockCachingCommand (called a BlockIdCommand in Hadoop) is an instruction to a DataNode regarding some blocks under its control. This instruction will be one of the following:
1. Cache the specified blocks
2. Uncache the specified blocks
All this command requires is the list of block IDs and the action to be taken.
- Rice HDFS
- General Notes
- Common
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NameNode
- Glossary
- Specification
- Documentation
- Specification
- DataNode
- Teams and Structure
- Overview
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- Interfacing with NameNode
- Interfacing with Client
- Interfacing with other DataNodes