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From "Christopher Tubbs (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ACCUMULO-1712) Remove special characters from path names of metadata tables
Date Wed, 11 Sep 2013 22:31:54 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-1712?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Christopher Tubbs updated ACCUMULO-1712:
----------------------------------------

    Issue Type: Sub-task  (was: Improvement)
        Parent: ACCUMULO-1481
    
> Remove special characters from path names of metadata tables
> ------------------------------------------------------------
>
>                 Key: ACCUMULO-1712
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1712
>             Project: Accumulo
>          Issue Type: Sub-task
>            Reporter: Christopher Tubbs
>             Fix For: 1.6.0
>
>
> This is particularly problematic because of the quoting required to examine hdfs paths
with a "!" character in them. The root table ID and the metadata table ID should not use special
characters.
> Some considerations:
> # should not collide with possible user table IDs
> # might be useful, but may not be necessary, to retain lexicographical sort order, so
root table goes first, then metadata table, then other tables
> Some options:
> # Use negative numbers: -1 for the root table, -2 for the metadata table (my personal
favorite)
> # Use a different special character: %, &, +, or . (each of which may have special
considerations)
> # Reserve a block of IDs for internal use (say, 0-10 or 0-100), and move other tables
on upgrade

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