[jira] [Commented] (HDFS-12069) Ozone: Create a general abstraction for metadata store

["Weiwei Yang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-12069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16069847#comment-16069847 ] 

Weiwei Yang commented on HDFS-12069:
------------------------------------

Patch v1 uploaded. This patch creates an interface for ozone metadata store abstraction {{MetadataStore}}, it has defines all necessary APIs to support ozone metadata. And {{LevelDBStore}} now implements {{MetadataStore}}.

The goal is to off the hook so that we don't rely on particular DB implementation to manage ozone metadata, all the operations should be done from the {{MetadataStore}} interface.

Actually to make sure API is complete, I've done more than this patch. I have tried to replace all {{LevelDBStore}} references with {{MetadataStore}}, and it works out nicely. Please help to review.

Thanks.

> Ozone: Create a general abstraction for metadata store
> ------------------------------------------------------
>
>                 Key: HDFS-12069
>                 URL: https://issues.apache.org/jira/browse/HDFS-12069
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>            Reporter: Weiwei Yang
>            Assignee: Weiwei Yang
>         Attachments: HDFS-12069-HDFS-7240.001.patch
>
>
> Create a general abstraction for metadata store so that we can plug other key value store to host ozone metadata. Currently only levelDB is implemented, we want to support RocksDB as it provides more production ready features.



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