Guanghao Zhang created HBASE-21367:
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Summary: Add table/region/row's statistics output for
WALPrettyPrinter
Key: HBASE-21367
URL: https://issues.apache.org/jira/browse/HBASE-21367
Project: HBase
Issue Type: Improvement
Reporter: Guanghao Zhang
A real case in our production cluster. We found one RS's replication peer
replicated very slowly. And it is much slower than other RSs. Then we use
WALPrettyPrinter to output the WAL's edits. And found 90% edits is for same
row. It was a bug of user's MR job. The job always update same row but
replicate to a peer cluster very slowly as we need replicate all updates to
peer cluster. A statistics output for table/region/row will help us to find
these problems quickly. It looks like as follows.
||Table/Region/Row||edits number||
|t1|xxxxx|
|region2|xxxxx|
|row3|xxxxx|
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