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From "Christopher Tubbs (JIRA)" <>
Subject [jira] [Resolved] (ACCUMULO-1228) Allow clients to disable column families and locality groups
Date Tue, 07 Apr 2015 02:25:12 GMT


Christopher Tubbs resolved ACCUMULO-1228.
       Resolution: Won't Fix
    Fix Version/s:     (was: 1.8.0)

I'm closing this for now, because it doesn't seem to make a lot of sense to keep punting on
the fixVersion.

Also, it seems there were a few related issues identified here, and they seem to need further
teasing out, perhaps in some DISCUSS threads on the mailing list, before proceeding. I would
recommend new, more narrowly focused issues be placed in new, separate JIRAs, if anybody has
a use case that warrants revisiting anything discussed here.

> Allow clients to disable column families and locality groups
> ------------------------------------------------------------
>                 Key: ACCUMULO-1228
>                 URL:
>             Project: Accumulo
>          Issue Type: New Feature
>          Components: client, tserver
>    Affects Versions: 1.5.0
>            Reporter: William Slacum
>            Priority: Minor
> There's an inconsistency between what a server is capable of and what a client can tell
it to do with respect to fetching column families.
> Currently, a user can tell a {{Scanner}} to fetch some set of column families. The iterators
support not only this, but also the converse where a user does not want to retrieve column
families. An iterator implementation can do this by hand, but a client cannot specifically
tell a Scanner to not return data from a set of column families. Clients should be able to
specify this option.
> There also seems to be an inconsistency with how locality groups are defined and then
utilized. If I want to specify a set of column families as being part of a locality group,
I have to provide a mapping of locality group name to a list of column families. If I want
to fetch a locality group, I have to get the mapping first, rather than just set which locality
group I want to use. It'd be more convenient to tell the scanner just to fetch which locality
groups I want, and have the server know which column families that means.

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