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Posted to notifications@iotdb.apache.org by "Zesong Sun (Jira)" <ji...@apache.org> on 2021/11/24 06:16:00 UTC

[jira] [Commented] (IOTDB-1929) Implement and test of B+Tree index to replace MetadataIndex

    [ https://issues.apache.org/jira/browse/IOTDB-1929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17448381#comment-17448381 ] 

Zesong Sun commented on IOTDB-1929:
-----------------------------------

实现过程中遇到的问题记录：

1. 每个 MetadataIndexNode 需要一个额外的 isLeaf 来表明是否为叶子节点
2. 为了在获得全部时间序列（而不需要反序列化其 TimeseriesMetadata），最后一层节点必须是稠密索引（即 isLeaf 层的 MetadataIndexNode 必须是能展示所有的时间序列的），之前的示例图中第一种情况（5设备 5传感器）有误

> Implement and test of B+Tree index to replace MetadataIndex
> -----------------------------------------------------------
>
>                 Key: IOTDB-1929
>                 URL: https://issues.apache.org/jira/browse/IOTDB-1929
>             Project: Apache IoTDB
>          Issue Type: Task
>            Reporter: Jialin Qiao
>            Assignee: Zesong Sun
>            Priority: Major
>   Original Estimate: 16h
>  Remaining Estimate: 16h
>




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