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https://issues.apache.org/jira/browse/HBASE-20649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16511197#comment-16511197
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Peter Somogyi commented on HBASE-20649:
---------------------------------------
I made some testing how much time it takes to check the HFiles. I used hbase in
pseudo-distributed mode backed by HDFS running on the same single instance.
There were 504 HFiles under hbase.rootdir and runtime for {{bin/hbase
pre-upgrade validate-hfile}} was 4 seconds.
> Validate HFiles do not have PREFIX_TREE DataBlockEncoding
> ---------------------------------------------------------
>
> Key: HBASE-20649
> URL: https://issues.apache.org/jira/browse/HBASE-20649
> Project: HBase
> Issue Type: New Feature
> Reporter: Peter Somogyi
> Assignee: Peter Somogyi
> Priority: Minor
> Attachments: HBASE-20649.master.001.patch,
> HBASE-20649.master.002.patch, HBASE-20649.master.003.patch
>
>
> HBASE-20592 adds a tool to check column families on the cluster do not have
> PREFIX_TREE encoding.
> Since it is possible that DataBlockEncoding was already changed but HFiles
> are not rewritten yet we would need a tool that can verify the content of
> hfiles in the cluster.
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