[jira] [Commented] (ACCUMULO-3147) Replication table should be user-controlled or live in accumulo namespace

["Josh Elser (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ACCUMULO-3147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14139696#comment-14139696 ] 

Josh Elser commented on ACCUMULO-3147:
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So context/confirmation -- yes, the replication table is lazily created. Early on, I had tried to automate creating this table which has a bunch of pain behind it (initialization and upgrades suddenly get changed). Creating it before users need it also could create some confusion about why it even exists (rightfully so).

I really don't want to introduce special credentials to be used for replication (I think the tracer configuration is currently sub-par with the way it must be configured now). The larger replication feature needs to write to metadata in addition to the replication table and these writes are performed by the tabletserver, master or garbage collector which system credentials really simplifies. I also really don't like requiring manual setup of additional features (I think configuration is hard enough -- we can hide this). I think putting it in its own namespace or the system namespace makes the most sense.

> Replication table should be user-controlled or live in accumulo namespace
> -------------------------------------------------------------------------
>
>                 Key: ACCUMULO-3147
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3147
>             Project: Accumulo
>          Issue Type: Bug
>          Components: replication
>            Reporter: Christopher Tubbs
>            Assignee: Josh Elser
>             Fix For: 1.7.0
>
>
> At present, it looks like the replication table is managed by/written to by the system user, yet the table lives in the default namespace, which is where user tables live.
> This appears to violate the namespace model of segregating system tables from user tables.
> There's a few options for resolution:
> # Move the replication table into the reserved accumulo system namespace (there's some complication with this, because the system namespace is currently static, and the replication table may be created at any time; additionally, if users are expected to interact with this table... and I'm not sure if they are at all, the system namespace is probably not appropriate).
> # Create an additional reserved system namespace for replication (my least preferred option).
> # Use user credentials to manage/write to this table, rather than the system user (this is what the tracer/trace table does, and this is my preferred solution.)



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