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Posted to notifications@iotdb.apache.org by "Yuan Tian (Jira)" <ji...@apache.org> on 2020/06/10 07:58:00 UTC

[jira] [Created] (IOTDB-760) Lazy Contruct Alias Map in InternalMNode

Yuan Tian created IOTDB-760:
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             Summary: Lazy Contruct Alias Map in InternalMNode
                 Key: IOTDB-760
                 URL: https://issues.apache.org/jira/browse/IOTDB-760
             Project: Apache IoTDB
          Issue Type: Improvement
          Components: Core/Engine
            Reporter: Yuan Tian
            Assignee: Yuan Tian


Currently, we maintain an alias map for each InternalMNode. However, firstly, only the device node will have data in that map; secondly, not all of the device node will have alias.

And the map has initial capacity of 16, that will waste some memory footprint.

So, we can defer the construction to when the alias map is really used, i.e. there are alias added to this node.



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