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https://issues.apache.org/jira/browse/HADOOP-15038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16276234#comment-16276234
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Kai Zheng commented on HADOOP-15038:
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Thanks for the discussion, folks.
The idea to extract MetadataStore into a Hadoop common module sounds good to
me, but when do it, we should be careful not to introduce non-trivial
dependencies.
[[email protected]] it looks to me the cloudup package would be a good fit for
the new module. Could you introduce the new module when do the work of
HADOOP-14766? If nice, how to name the module (under hadoop-common-project)?
IMO hadoop-cloud-common might be better, sure hadoop-cloud-core is also good to
me.
[~ajfabbri] do you have any concerns if the main work of MetadataStore is
extracted and put into hadoop-common-project/hadoop-cloud-common?
Not sure if [~chris.douglas] would have more thoughts on this.
Thanks!
> 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). [[email protected]] 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.
> [[email protected]] [~fabbri] [~drankye] Any suggestion is appreciated.
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