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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-4500) Implement visibility histograms as a table feature
Date Mon, 17 Oct 2016 14:26:58 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-4500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15582408#comment-15582408
] 

Josh Elser commented on ACCUMULO-4500:
--------------------------------------

bq. can we also it configurable to turn off and on

bq. in favor of making a configurable per table function

Agreed. Hadn't started thinking about this yet. Just wanted to build the support into RFile
first.

bq. turn it on, only new ingest and files that get compacted would have the info. If you turn
have it on, then turn it off, new data would not have it and compactions would not write it
back out

This brings up a good point. Through the hypothetical client API, perhaps we could return
some info that the histogram is incomplete (when we see that we touched a file which did not
have the information computed).

> Implement visibility histograms as a table feature
> --------------------------------------------------
>
>                 Key: ACCUMULO-4500
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4500
>             Project: Accumulo
>          Issue Type: New Feature
>          Components: client, tserver
>            Reporter: Josh Elser
>
> Add support to quickly extract a histogram of all of the visibilities stored in an Accumulo
table.
> DISCUSS: https://lists.apache.org/thread.html/df5e764362a95277344fd2731a432e9fafc60595e7d30015d9a56b9c@%3Cdev.accumulo.apache.org%3E



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