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From "Christopher Tubbs (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ACCUMULO-802) table namespaces
Date Fri, 31 May 2013 20:23:19 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-802?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Christopher Tubbs updated ACCUMULO-802:
---------------------------------------

    Summary: table namespaces  (was: namespaces)
    
> table namespaces
> ----------------
>
>                 Key: ACCUMULO-802
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-802
>             Project: Accumulo
>          Issue Type: Improvement
>            Reporter: Eric Newton
>            Assignee: Christopher Tubbs
>             Fix For: 1.6.0
>
>
> A large cluster is a valuable shared resource.  The current permission system and simple
table naming structure does not allow for delegation of authority and safe partitioning within
this shared resource.
> Use cases:
>  # create a namespace (like "test") and delegate the {{grant}} permission to tables created
in that namespace to a user that would manage those tables. Presently, {{grant}} is never
delegated.
>  # create simple "test" and "production" namespaces that are trivial for users to switch
between.  For example, instead of having tables "test_index" and "test_documents" the client
would support "index" and "documents" with an API to support switching trivially between the
the different environments.
>  # create a set of tables in a namespace called "latest"  This namespace is re-created
periodically with a map-reduce job.  If code changes inadvertently create a corrupt "latest,"
users can switch to the set of tables known as "safest"  In this way, users can experiment,
and provide feedback on incremental improvements, while have a safe fallback.
>  # two applications hosted on the same cluster that can share a table, which has been
"aliased" into their namespace.  Namespace-local permissions are ignored, but a (most likely
read-only) view of the table is available.  This would be helpful for reference tables.
>  # quotas/priorities.  Implement namespace-specific priorities and resource allocations.
 It is reasonable to run namespace-specific queries and ingest on production equipment. Large
cluster resources are always limited, and often the *only* place where near-production quality
software can be run at full scale.

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