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https://issues.apache.org/jira/browse/IOTDB-1727?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hai Liu reassigned IOTDB-1727:
------------------------------
Assignee: Yukun Zhou
> Slow creation of timeseries with tag
> ------------------------------------
>
> Key: IOTDB-1727
> URL: https://issues.apache.org/jira/browse/IOTDB-1727
> Project: Apache IoTDB
> Issue Type: Improvement
> Components: Core/Schema Manager
> Reporter: Yukun Zhou
> Assignee: Yukun Zhou
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.13.0, 0.12.3
>
>
> Problem:
> When user creates a timeseries with tag or attribute, the tag/attribute
> record will be persisted to TagLogFile.
> Currently, every TagLogFile writing operation will be force flushed to disk,
> and too many disk I/O will cause poor performance.
> A example case is that, one timeseries creation costs 48ms and around 8000
> timeseries with tag creation costs 5-6min.
>
> Solution:
> Set the force flush mode of FileChannel to false and execute force flush
> every N writing operations. N is an customized interval value that user can
> config.
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