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https://issues.apache.org/jira/browse/IOTDB-520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jialin Qiao closed IOTDB-520.
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Fix Version/s: (was: master branch)
0.10.0-SNAPSHOT
Resolution: Fixed
> Result of IBatchReader should not cross partition
> -------------------------------------------------
>
> Key: IOTDB-520
> URL: https://issues.apache.org/jira/browse/IOTDB-520
> Project: Apache IoTDB
> Issue Type: Improvement
> Reporter: Tian Jiang
> Assignee: Zesong Sun
> Priority: Major
> Labels: batch, distributed, pull-request-available, query
> Fix For: 0.10.0-SNAPSHOT
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Situation:
> Assuming daily partitioning.
> Node A manages the data of Day1,3,5 and Node B manages the data of Day2,4. In
> the current implementation, when the coordinator node fetches a batch from
> Node A, the batch may contain data of Day1,3 and the batch from Node B
> contains data of Day2. As a result, the coordinator node must merge the two
> batches to retain an ordered batch.
> But if the batches never cross the partition border, the coordinator node
> will be able to just return the batches without merging using a heap
> comparing the first element of each batch, which could reduce the merging
> overheads.
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