[ https://issues.apache.org/jira/browse/HADOOP-928?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Hairong Kuang updated HADOOP-928:
---------------------------------
Attachment: checksum3.patch
It sounds good. The new patch reflects the suggestion. Hope that the patch does not break
anything. :-)
> make checksums optional per FileSystem
> --------------------------------------
>
> Key: HADOOP-928
> URL: https://issues.apache.org/jira/browse/HADOOP-928
> Project: Hadoop
> Issue Type: Improvement
> Components: fs
> Reporter: Doug Cutting
> Assigned To: Hairong Kuang
> Attachments: checksum.patch, checksum1.patch, checksum2.patch, checksum3.patch
>
>
> Checksumming is currently built into the base FileSystem class. It should instead be
optional, with each FileSystem implementation electing whether to use the Hadoop-provided
checksum system, or to disable it, or to implement its own custom checksum system.
> To implement this, a ChecksumFileSystem implementation can be provided that wraps another
FileSystem implementation, implementing checksums as in Hadoop's current mandatory implementation
(i.e., as a separate crc file per file that's elided from directory listings). The 'raw'
FileSystem methods would be removed. FSDataInputStream and FSDataOutputStream would be made
interfaces.
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