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https://issues.apache.org/jira/browse/IOTDB-3274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jialin Qiao reassigned IOTDB-3274:
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Assignee: (was: Jialin Qiao)
> Optimize the TsFileResource Index
> ---------------------------------
>
> Key: IOTDB-3274
> URL: https://issues.apache.org/jira/browse/IOTDB-3274
> Project: Apache IoTDB
> Issue Type: Improvement
> Reporter: Jialin Qiao
> Priority: Major
>
> Currently, the TsFileResources are all cached in memory. When its memory
> exceeds a threshold, we degrade the Device_time_index to file_time_index,
> however, this affects the query performance and the open file num in the
> query.
> The root cause is that TsFileResources are leaf indexes, whose memory
> corresponds to the tsfile number, we need to build a tree index and only
> cache some parent nodes in memory.
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