Andrew Kyle Purtell created HBASE-28919:
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Summary: Soft drop for destructive table actions
Key: HBASE-28919
URL: https://issues.apache.org/jira/browse/HBASE-28919
Project: HBase
Issue Type: New Feature
Components: master, snapshots
Reporter: Andrew Kyle Purtell
Assignee: Andrew Kyle Purtell
Attachments: Soft Drop for Destructive Table Actions.pdf
When we administratively drop a table column or entire table, or truncate a
table, the process begins rapidly. Procedures are scheduled for immediate
execution that then modify or remove descriptors and state in META and on disk,
and take unrecoverable actions at the HDFS layer. Although HFiles are copied to
the archive in a destructive action, recovery scenarios are not automatic and
involve some operator labor to reconstruct the table and re-import the archived
data. If the HFileCleaner is not properly configured to facilitate such
recovery then some data is not recoverable soon after procedure execution
commences and all affected data is not recoverable within minutes. A customer
faced with such an accident will be unhappy because the recovery scenarios
available to them from this will involve either a restore from backup or from
an earlier snapshot, and any changes committed more recently than the time of
the last backup or last snapshot will be lost.
Design document is attached.
I have a *working implementation* of this proposal based on a fork of
branch-2.5.
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