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From "Christopher Tubbs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1963) Rename metadata table ID (!0) so it doesn't have an exclamation point
Date Wed, 15 Jan 2014 02:37:20 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13871557#comment-13871557
] 

Christopher Tubbs commented on ACCUMULO-1963:
---------------------------------------------

Well, it can't be *anything*... we still want to make sure to avoid collisions with non-reserved
(user) tables' IDs, which are base36 decimals. Additionally, for sanity reasons, I think it
should differ by more than just case (especially if we want sane behavior on case-insensitive
filesystems like HFS+ on OS X).

Personally, I like it sorting before other tables in the underlying filesystem, for convenience
when I do directory listings... but it doesn't have to.

> 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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