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From Billie J Rinaldi <billie.j.rina...@ugov.gov>
Subject Re: Authorizations vs Column Visibility in FileCount example
Date Fri, 06 Jan 2012 18:00:59 GMT
On Thursday, January 5, 2012 5:17:56 PM, "David Medinets" <david.medinets@gmail.com>
wrote:
> README.dirlist has the following command line:
> 
> ./bin/accumulo org.apache.accumulo.examples.dirlist.FileCount instance
> zookeepers username password dirTable exampleVis exampleVis
> 
> The last two parameters are Authorizations and ColumnVisibility. The
> README file should probably mention this. Also I feel that a short
> discussion of these two concepts would not be out of place inside this
> README file. I'd especially like to have the example extended (or
> replaced) so that the two values are different to allow new users
> (like me!) to more easily understand how the two concepts interact
> with each other.
> 
> My understanding is that ColumnVisibility is associated with the data.
> While Authorization is associated with the user. The discussion could
> be as short as that. It would just act as a reminder to the reader.
> 
> Upon furher reflection, perhaps a README.security makes sense so that
> concrete examples of these concepts can be given. Then the
> README.dirlist can point to the README.security.
> 
> I'm looking at the README files in alphabetic order. I think this is
> the first time that both Authorizations and ColumnVisibility are used
> on one command line.

Good idea.  I created ACCUMULO-280.  I think I'll go with README.visibility.

Billie

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