Geoffrey Jacoby created HBASE-23602: ---------------------------------------
Summary: TTL Before Which No Data is Purged Key: HBASE-23602 URL: https://issues.apache.org/jira/browse/HBASE-23602 Project: HBase Issue Type: New Feature Reporter: Geoffrey Jacoby HBase currently offers operators a choice. They can set KEEP_DELETED_CELLS=true and VERSIONS to max value, plus no TTL, and they will always have a complete history of all changes (but high storage costs and penalties to read performance). Or they can have KEEP_DELETED_CELLS=false and VERSIONS/TTL set to some reasonable values, but that means that major compactions can destroy the ability to do a consistent snapshot read of any prior time. (This limits the usefulness and correctness of, for example, Phoenix's SCN lookback feature.) I propose having a new TTL property to give a minimum age that an expired or deleted Cell would have to achieve before it could be purged. (I see that HBASE-10118 already does something similar for the delete markers themselves.) This would allow operators to have a consistent history for some finite amount of recent time while still purging out the "long tail" of obsolete / deleted versions. -- This message was sent by Atlassian Jira (v8.3.4#803005)