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https://issues.apache.org/jira/browse/HADOOP-15616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16720634#comment-16720634
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Steve Loughran commented on HADOOP-15616:
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bq. 2. Should we put hadoop-cos under hadoop-tools project like s3a, adsl, etc. 
instead of hadoop-cloud-storage-project?
At first, I also thought I should put it under the hadoop-tools project. 
However, as steve's comment above, using "hadoop-cloud-storage-project" seems 
more appropriate,isn't it?

it was always intended that new stores would go into 
hadoop-cloud-storage-project; we've left the existing ones alone to make cherry 
picking patches into existing releases possible

If you haven't already, you can/should also upldate 
hadoop-cloud-storage-project/hadoop-cloud-storage to include the new module 
-but excluding hadoop-common and its dependencies, for a leaner dependency set. 
This is used in spark, tez, druid and places to pick up all the stores (if you 
look closely at HDP-3's poms we also pull in google gcs that way)

> Incorporate Tencent Cloud COS File System Implementation
> --------------------------------------------------------
>
>                 Key: HADOOP-15616
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15616
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs/cos
>            Reporter: Junping Du
>            Assignee: YangY
>            Priority: Major
>         Attachments: HADOOP-15616.001.patch, HADOOP-15616.002.patch, 
> HADOOP-15616.003.patch, HADOOP-15616.004.patch, HADOOP-15616.005.patch, 
> HADOOP-15616.006.patch, Tencent-COS-Integrated.pdf
>
>
> Tencent cloud is top 2 cloud vendors in China market and the object store COS 
> ([https://intl.cloud.tencent.com/product/cos]) is widely used among China’s 
> cloud users but now it is hard for hadoop user to access data laid on COS 
> storage as no native support for COS in Hadoop.
> This work aims to integrate Tencent cloud COS with Hadoop/Spark/Hive, just 
> like what we do before for S3, ADL, OSS, etc. With simple configuration, 
> Hadoop applications can read/write data from COS without any code change.



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