hbase-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Lars George (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-8784) Wildcard/Range/Partition Delete Support
Date Fri, 21 Jun 2013 15:58:20 GMT
Lars George created HBASE-8784:

             Summary: Wildcard/Range/Partition Delete Support
                 Key: HBASE-8784
                 URL: https://issues.apache.org/jira/browse/HBASE-8784
             Project: HBase
          Issue Type: New Feature
          Components: Client, Deletes, regionserver
            Reporter: Lars George

We often see use-cases where users, for example with timeseries data, would like to do deletes
of large ranges of data, basically like a delete of a partition as supported by RDBMSs. We
should support regular expressions or range expressions for the matches (supporting binary
keys obviously).

The idea is to store the deletes not with the data, but the meta data. When we read files
we read the larger deletes first, and then the inline ones. Of course, this should be reserved
for few but very data intensive deletes. This reduces the number of deletes to write to one,
instead of many (often thousands, if not millions). This is different from the BulkDeleteEndpoint
introduced in HBASE-6942. It should support similar Scan based selectiveness. 

The new range deletes will mask out all the matching data and handled otherwise like other
deletes, for example being dropped during major compactions, once all masked data has been
dropped too.

To be discussed is how and where we store the delete entry in practice, since meta data might
not be wanted. But it seems like a reasonable choice. The DeleteTracker can handle the delete
the same with additional checks for wildcards/ranges. If the deletes are not used, no critical
path is affected, therefore not causing any additional latencies or other regressions.

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

View raw message