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Posted to common-issues@hadoop.apache.org by "Yongjun Zhang (JIRA)" <ji...@apache.org> on 2018/05/09 05:58:00 UTC
[jira] [Commented] (HADOOP-13055) Implement linkMergeSlash and
linkFallback for ViewFileSystem
[ https://issues.apache.org/jira/browse/HADOOP-13055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16468410#comment-16468410 ]
Yongjun Zhang commented on HADOOP-13055:
----------------------------------------
Talked with [~xiaochen], we agreed to revert it from 3.0.3 since it's a new feature. Thanks.
> Implement linkMergeSlash and linkFallback for ViewFileSystem
> ------------------------------------------------------------
>
> Key: HADOOP-13055
> URL: https://issues.apache.org/jira/browse/HADOOP-13055
> Project: Hadoop Common
> Issue Type: New Feature
> Components: fs, viewfs
> Affects Versions: 2.7.5
> Reporter: Zhe Zhang
> Assignee: Manoj Govindassamy
> Priority: Major
> Fix For: 3.1.0, 3.0.3
>
> Attachments: HADOOP-13055.00.patch, HADOOP-13055.01.patch, HADOOP-13055.02.patch, HADOOP-13055.03.patch, HADOOP-13055.04.patch, HADOOP-13055.05.patch, HADOOP-13055.06.patch, HADOOP-13055.07.patch, HADOOP-13055.08.patch, HADOOP-13055.09.patch
>
>
> In a multi-cluster environment it is sometimes useful to operate on the root / slash directory of an HDFS cluster. E.g., list all top level directories. Quoting the comment in {{ViewFs}}:
> {code}
> * A special case of the merge mount is where mount table's root is merged
> * with the root (slash) of another file system:
> * <ul>
> * <li> fs.viewfs.mounttable.default.linkMergeSlash=hdfs://nn99/
> * </ul>
> * In this cases the root of the mount table is merged with the root of
> * <b>hdfs://nn99/ </b>
> {code}
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