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Posted to common-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2019/03/04 12:23:00 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=16783329#comment-16783329 ]
Steve Loughran commented on HADOOP-15038:
-----------------------------------------
We're still having "fun" with getting that stuff stable in S3. I'm kind of reluctant to pull it for broader use until I think we're stable w.r.t
* out of band operations (updates HADOOP-15999 & deletes(
* partial failure of rename/delete
* etag tracking HADOOP-16085 + HADOOP-15984. This'll add a new column to the table
Right now I don't think it's ready to share across modules
> 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: 3.2.0, 2.9.2, 3.0.3, 3.1.2
> Reporter: Genmao Yu
> Assignee: wujinhu
> Priority: Major
> Attachments: HADOOP-15038.001.patch
>
>
> 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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