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From "Christopher Tubbs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1482) Put provided tables in their own (system) namespace
Date Sat, 01 Jun 2013 20:07:19 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13672223#comment-13672223
] 

Christopher Tubbs commented on ACCUMULO-1482:
---------------------------------------------

{quote}unlikely for a user to want to use{quote}

It's stricter than that. "!" is a disallowed character in the create table command. It's not
just that it's unlikely they'll want to use it, but they won't be able to even if they did
want to.

{quote}Am I missing something else?{quote}

No, I don't think so. A separate namespace satisfies those concerns for the monitor (see ACCUMULO-1480).

We could name the system namespace "!", as in "!.ROOT" and "!.METADATA" :)

There is the question of what to call this namespace. Whatever it is, it should be reserved,
and it might be useful to use a character that is not disallowed in table/namespace names,
so it won't ever conflict with user-defined table namespaces.
                
> Put provided tables in their own (system) namespace
> ---------------------------------------------------
>
>                 Key: ACCUMULO-1482
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1482
>             Project: Accumulo
>          Issue Type: Sub-task
>            Reporter: Christopher Tubbs
>             Fix For: 1.6.0
>
>
> The !METADATA table and possibly a separate !!ROOT (ACCUMULO-1481) table should be placed
in their own namespace.
> Trace might need to go in its own namespace (metrics.trace?)

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