Andrew Purtell created HBASE-22648:
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Summary: Snapshot TTL
Key: HBASE-22648
URL: https://issues.apache.org/jira/browse/HBASE-22648
Project: HBase
Issue Type: New Feature
Components: snapshots
Reporter: Andrew Purtell
Snapshots have a lifecycle that is independent from the table from which they
are created. Although data in a table may be stored with TTL the data files
containing them become frozen by the snapshot. Space consumed by expired cells
will not be reclaimed by normal table housekeeping like compaction. While this
is expected it can be inconvenient at scale. When many snapshots are under
management and the data in various tables is expired by TTL some notion of
optional TTL (and optional default TTL) for snapshots could be useful. It will
help prevent the accumulation of junk files by automatically dropping the
snapshot after the assigned TTL, making their data files eligible for cleaning.
More comprehensive snapshot lifecycle management may be considered in the
future but this one case is expected to be immediately useful given TTls on
data are commonly applied for similar convenience.
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