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From "Thejas M Nair (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-16859) CM uri encoding
Date Mon, 19 Jun 2017 20:49:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-16859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16054712#comment-16054712
] 

Thejas M Nair commented on HIVE-16859:
--------------------------------------

Should we support a key=value format, so that this is extendable for adding additional params
in future ?
Does it make sense to encode the 'settings' at a metadata level instead of per file level
?


> CM uri encoding
> ---------------
>
>                 Key: HIVE-16859
>                 URL: https://issues.apache.org/jira/browse/HIVE-16859
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2
>    Affects Versions: 3.0.0
>            Reporter: anishek
>            Assignee: anishek
>
> Currently for hive replication, the cm root uri is configured via "hive.repl.cmrootdir".
This configuration needs to have the same value on both the primary and replica hive warehouse.

> CM uri should be encoded such that the cm root of the source should be part of the URI
itself. so the cmfs uri's should be following
> {code}
> cmfs:hdfs://[authority]/[actual_location]#[checksum_of_file]_[encoded_cm_root_on_primary]
> {code}
> so that we can detect what is the root location of the source cm root at any target replica
warehouse. Since the filesystem configurations can be different for the  primary and replica
warehouse there might be additional configurations will be required to create {{FileSystem}}
objects to talk to respective filesystems. if we want to support that we can add an additional
configuration stating the primary cm root location on the replica warehouse along with other
fs related configurations and in that case this bug might be irrelevant.



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