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https://issues.apache.org/jira/browse/ACCUMULO-1482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13672218#comment-13672218
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Christopher Tubbs commented on ACCUMULO-1482:
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{quote}is there any more reason to put one to many !'s in front of METADATA
(and ROOT){quote}
No, absolutely not. Implementing this feature would allow us to use normal
table names for these system tables (we don't even have to make them upper-case
to make them stand out).
{quote}the !'s were only to make them sort to the top of the monitor page{quote}
That's not the only reason. It's also that way for historical reasons, because,
before tables had permanent IDs and could be renamed, table names (instead of
IDs) were in the !METADATA table the !METADATA table's own tablets stored in
the root tablet had to sort before other tables' tablets. (This is still a
requirement, unless/until ACCUMULO-1481, but now applies to the table ID, which
is why the tableID is now !0 for the !METADATA table).
> 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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