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https://issues.apache.org/jira/browse/ACCUMULO-1963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13867839#comment-13867839
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Eric Newton commented on ACCUMULO-1963:
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No, it does not matter.
In fact, the metadata table id can be anything now. Before 1.6.0, the metadata
table id had to sort earlier than all the other table ids so that they would
fall onto the root tablet.
> Rename metadata table ID (!0) so it doesn't have an exclamation point
> ---------------------------------------------------------------------
>
> Key: ACCUMULO-1963
> URL: https://issues.apache.org/jira/browse/ACCUMULO-1963
> Project: Accumulo
> Issue Type: Bug
> Reporter: Christopher Tubbs
> Fix For: 1.7.0
>
>
> The table ID for the metadata table is problematic. The reserved character
> requires special escaping in shells, like bash.
> This was going to happen with ACCUMULO-1712, but would require some effort to
> upgrade and test the root table, walogs, and HDFS paths, so this is going to
> be postponed and not completed for 1.6.
> The proposed new table ID is "\+m", following the conventions of the root
> table, whose ID is "\+r". ("\+" can be used much more safely across
> filesystems and shells).
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