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From "Keith Turner (Commented) (JIRA)" <>
Subject [jira] [Commented] (ACCUMULO-164) Add support for wildcards/regexes in locality group setting.
Date Mon, 12 Mar 2012 16:15:39 GMT


Keith Turner commented on ACCUMULO-164:

A prefix wildcard is a simple form of a range.  One other thing we may want to consider is
simply having ranges.  So the candidates for this ticket would be prefix wildcards, suffix
wildcards, and/or ranges.  These can be all be automatically verified as disjoint.

Is allowing this type of setting in locality group configuration worthwhile w/o changing the
scanner API?  If we decided to allow prefix wildcards, then it would be easy to create a locality
group with millions of actual column families.  However there is no way on the client side
to ask for everything in that locality group without enumerating all possible column families.
 It may not be possible to enumerate all possible columns families, therefore it may not be
possible to read an entire locality group.  To remedy this the client API and iterator API
would need to be changed to allow specification of column prefixes (or ranges, or column suffixes).

> Add support for wildcards/regexes in locality group setting.
> ------------------------------------------------------------
>                 Key: ACCUMULO-164
>                 URL:
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: client, master, tserver
>            Reporter: John Vines
> We should look into adding the ability to specify locality group columns as either wildcarding
or regexes. I'm unsure of the feasibility of this, hence the lack of fix date.

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