Optimize pread on ChecksumFileSystem
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Key: HADOOP-7370
URL: https://issues.apache.org/jira/browse/HADOOP-7370
Project: Hadoop Common
Issue Type: Improvement
Components: fs
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Minor
Attachments: checksumfs-pread-0.20.txt
Currently the implementation of positional read in ChecksumFileSystem is verify
inefficient - it actually re-opens the underlying file and checksum file, then
seeks and uses normal read. Instead, it can push down positional read directly
to the underlying FS and verify checksum.
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