[jira] [Created] (KUDU-1994) Automatically Create New Range Partitions When Needed

["Alan Jackoway (JIRA)" <ji...@apache.org>]

Alan Jackoway created KUDU-1994:
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             Summary: Automatically Create New Range Partitions When Needed
                 Key: KUDU-1994
                 URL: https://issues.apache.org/jira/browse/KUDU-1994
             Project: Kudu
          Issue Type: Improvement
    Affects Versions: 1.3.0
            Reporter: Alan Jackoway


We have a few Kudu tables where we use a range-partitioned timestamp as part of the key. The intention of this is to keep data locality for data that is likely to be scanned together, such as events in a timeseries.

Currently we create these with a partitions that look like this:
{noformat}
RANGE (ts) (
    PARTITION 0 <= VALUES < 1420088400000,
    PARTITION 1420088400000 <= VALUES < 1427860800000,
    PARTITION 1427860800000 <= VALUES < 1435723200000,
    PARTITION 1435723200000 <= VALUES < 1443672000000,
    PARTITION 1443672000000 <= VALUES < 1451624400000,
    PARTITION 1451624400000 <= VALUES < 1459483200000,
    PARTITION 1459483200000 <= VALUES < 1467345600000,
    PARTITION 1467345600000 <= VALUES < 1475294400000,
    PARTITION 1475294400000 <= VALUES < 1483246800000,
    PARTITION 1483246800000 <= VALUES < 1491033600000,
    PARTITION 1491033600000 <= VALUES < 1498896000000,
    PARTITION 1498896000000 <= VALUES < 1506844800000
)
{noformat}

The problem is that as time goes on we have to choose to either create empty partitions in advance of when we are writing data or risk forgetting to create a partition and having writes of new data fail.

Ideally, Kudu would have a way to indicate the size of the partitions (in this example 3 months converted to milliseconds) and then automatically create new partitions when new data comes in that needs the partition.



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