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Posted to common-issues@hadoop.apache.org by "Aaron Fabbri (JIRA)" <ji...@apache.org> on 2017/11/14 23:01:00 UTC
[jira] [Commented] (HADOOP-15038) Abstract MetadataStore in S3Guard
into a common module.
[ https://issues.apache.org/jira/browse/HADOOP-15038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16252646#comment-16252646 ]
Aaron Fabbri commented on HADOOP-15038:
---------------------------------------
I am happy to move {{MetadataStore}} and related interfaces outside of {{hadoop-aws}} as soon as another module needs it. I originally intended for this to be possible, just didn't want to pollute public hadoop common until it was needed by another client. I know some of the ADLS developers were interested in using it so I worked to keep it separate.
Can you comment on when you will need this? It might be a good idea to use HADOOP-14098 as a top-level "umbrella" JIRA for your effort, and create subtasks so we can see more details on how you plan to do the work?
> Abstract MetadataStore in S3Guard into a common module.
> -------------------------------------------------------
>
> Key: HADOOP-15038
> URL: https://issues.apache.org/jira/browse/HADOOP-15038
> Project: Hadoop Common
> Issue Type: New Feature
> Components: fs
> Affects Versions: 3.0.0-beta1
> Reporter: Genmao Yu
>
> Open this JIRA to discuss if we should move {{MetadataStore}} in {{S3Guard}} into a common module.
> Based on this work, other filesystem or object store can implement their own metastore for optimization (known issues like consistency problem and metadata operation performance). [~stevel@apache.org] and other guys have done many base and great works in {{S3Guard}}. It is very helpful to start work. I did some perf test in HADOOP-14098, and started related work for Aliyun OSS. Indeed there are still works to do for {{S3Guard}}, like metadata cache inconsistent with S3 and so on. It also will be a problem for other object store. However, we can do these works in parallel.
> [~stevel@apache.org] [~fabbri] [~drankye] Any suggestion is appreciated.
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