[jira] [Closed] (FLINK-29297) Group Table Store file writers into SingleFileWriter and RollingFileWriter

["Caizhi Weng (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-29297?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Caizhi Weng closed FLINK-29297.
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> Group Table Store file writers into SingleFileWriter and RollingFileWriter
> --------------------------------------------------------------------------
>
>                 Key: FLINK-29297
>                 URL: https://issues.apache.org/jira/browse/FLINK-29297
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table Store
>            Reporter: Caizhi Weng
>            Assignee: Caizhi Weng
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: table-store-0.3.0
>
>
> Currently we have two types of files to write:
> * Data files (LSM tree files), where a level 0 data file is a single file and a level >= 1 data file is a set of rolling files. Statistics for these files are needed for pruning when scanning.
> * Extra files (changelog files), just a list of records. No statistics are needed.
> However, current writers are all based on {{MetricFileWriter}}, which always produces statistics.
> We'd like to refactor the writers and group them into {{SingleFileWriter}} and {{RollingFileWriter}}. {{StatsCollectingSingleFileWriter}} should be a subclass of {{SingleFileWriter}} which additionally produces statistics, and data file writers should be a subclass of {{StatsCollectingSingleFileWriter}} or {{RollingFileWriter}} based on their level. For extra file writers, extending from {{SingleFileWriter}} is enough.



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