[
https://issues.apache.org/jira/browse/HBASE-5142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Zhihong Yu updated HBASE-5142:
------------------------------
Description: (was: Looking at
http://en.wikipedia.org/wiki/Standard_deviation, I think two passes are
involved in computing std:
1. compute average, u
2. tuple of (sum of (xi-u)*(xi-u), number of rows) is returned from each region
3. client computes std based on results from step 2)
Summary: Compute quantile/ntile using AggregateProtocol (was: Compute
standard deviation using AggregateProtocol)
> Compute quantile/ntile using AggregateProtocol
> ----------------------------------------------
>
> Key: HBASE-5142
> URL: https://issues.apache.org/jira/browse/HBASE-5142
> Project: HBase
> Issue Type: Sub-task
> Reporter: Zhihong Yu
>
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
