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HDFS-17524. OIV: add Transformed processor which reconstructs an fsimage from another fsimage file #6820
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…age from another fsimage file
We're closing this stale PR because it has been open for 100 days with no activity. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable. |
Description of PR
Hadoop 3.2 introduced optimization features for HDFS StringTable (b60ca37), It resulted in lower versions of Hadoop upgraded to 3.2 and later versions not supporting downgrade operations. Therefore, we have added Transformed Processor to support downgrading. In the upgrade with large version span, it avoids the low version can not read the fs-image generated by the 3.2 and later version, which support for the 3.2 and later version to be downgraded to the low version.
For more information about this PR, please refer to the following issue:
HDFS-17524 OIV: add Transformed processor which reconstructs an fsimage from another fsimage file.
How was this patch tested?
add TestOfflineImageViewer.testTransformedWriter()
add TestOfflineImageViewer.testTransformedWriterWrongLayoutVersion()
add TestOfflineImageViewer.testTransformedWriterReasonableLayoutVersion()
For code changes:
LICENSE
,LICENSE-binary
,NOTICE-binary
files?