tajo-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hyunsik Choi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (TAJO-106) Design and Implement Vectors class
Date Mon, 09 Dec 2013 16:06:09 GMT

     [ https://issues.apache.org/jira/browse/TAJO-106?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Hyunsik Choi updated TAJO-106:

    Fix Version/s:     (was: 0.8-incubating)

> Design and Implement Vectors class
> ----------------------------------
>                 Key: TAJO-106
>                 URL: https://issues.apache.org/jira/browse/TAJO-106
>             Project: Tajo
>          Issue Type: Sub-task
>          Components: physical operator
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
> The class 'Vectors' is the a base data structure that contains a number of rows in the
DSM (decomposition storage model) manner. In other words, Vectors object should have a list
of columns, each of which is an array of primitive types, such as int, long, and double. Also,
what each column values can be nullable should be considered for its design.
> The cache effect also should be considered for determining the size of each vector. According
to the MonetDB/X100 paper, 1000 values for each vector are the best size for cache effect.

This message was sent by Atlassian JIRA

View raw message