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From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-118) accumulo could work across HDFS instances, which would help it to scale past a single namenode
Date Wed, 11 Jul 2012 21:45:33 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13412033#comment-13412033
] 

Keith Turner commented on ACCUMULO-118:
---------------------------------------

Could consider supporting current paths starting with '/' or '../' and absolute paths like
hdfs://NN/abspath.  All of these have different prefixes so the code can easily disambiguate.
 The upside is that it takes less space in the metadata table and makes upgrade easier, the
downside is that it makes the code more complex.  The complexity can be managed by using centralized
code to decode relative and absolute paths into absolute paths.
                
> accumulo could work across HDFS instances, which would help it to scale past a single
namenode
> ----------------------------------------------------------------------------------------------
>
>                 Key: ACCUMULO-118
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-118
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: master, tserver
>    Affects Versions: 1.5.0
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>   Original Estimate: 2,016h
>  Remaining Estimate: 2,016h
>
> Consider using full path names to files, which would allow the servers to access the
files on any HDFS file system.
> Work may exist elsewhere to run HDFS using a number of NameNode instances to break up
the namespace.
> We may need a pluggable strategy to determine namespace for new files.

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