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ramkrishna.s.vasudevan updated HBASE-10885: ------------------------------------------- Release Note: Deletes can be specified with Cell Visibility as done for puts. Cells covered by the delete is found by doing pattern matching. A deleteFamily issued for row1, f1 with Cell Visibility (A & B) would delete only those cells of row1 under family f1 which has cell visibility A&B or B&A. A delete without any cell visibility would only delete those cells that does not have any cell visibility. > Support visibility expressions on Deletes > ----------------------------------------- > > Key: HBASE-10885 > URL: https://issues.apache.org/jira/browse/HBASE-10885 > Project: HBase > Issue Type: Improvement > Affects Versions: 0.98.1 > Reporter: Andrew Purtell > Assignee: ramkrishna.s.vasudevan > Priority: Blocker > Fix For: 0.99.0, 0.98.4, 2.0.0 > > Attachments: > 10885-org.apache.hadoop.hbase.security.visibility.TestVisibilityLabelsWithDeletes-output.txt, > HBASE-10885_0.98_1.patch, HBASE-10885_1.patch, HBASE-10885_2.patch, > HBASE-10885_branch_1.patch, HBASE-10885_new_tag_type_1.patch, > HBASE-10885_new_tag_type_2.patch, HBASE-10885_v1.patch, > HBASE-10885_v12.patch, HBASE-10885_v12.patch, HBASE-10885_v13.patch, > HBASE-10885_v15.patch, HBASE-10885_v17.patch, HBASE-10885_v17.patch, > HBASE-10885_v2.patch, HBASE-10885_v2.patch, HBASE-10885_v2.patch, > HBASE-10885_v3.patch, HBASE-10885_v4.patch, HBASE-10885_v5.patch, > HBASE-10885_v7.patch, HBASE-10885_v8.patch, HBASE-10885_v9.patch > > > Accumulo can specify visibility expressions for delete markers. During > compaction the cells covered by the tombstone are determined in part by > matching the visibility expression. This is useful for the use case of data > set coalescing, where entries from multiple data sets carrying different > labels are combined into one common large table. Later, a subset of entries > can be conveniently removed using visibility expressions. > Currently doing the same in HBase would only be possible with a custom > coprocessor. Otherwise, a Delete will affect all cells covered by the > tombstone regardless of any visibility expression scoping. This is correct > behavior in that no data spill is possible, but certainly could be > surprising, and is only meant to be transitional. We decided not to support > visibility expressions on Deletes to control the complexity of the initial > implementation. -- This message was sent by Atlassian JIRA (v6.2#6252)