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From "Jihoon Son (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-472) Umbrella ticket for accelerating query speed through memory cached table
Date Mon, 06 Jan 2014 13:45:51 GMT

    [ https://issues.apache.org/jira/browse/TAJO-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13862993#comment-13862993
] 

Jihoon Son commented on TAJO-472:
---------------------------------

Thanks, Hyunsik. 
You are right. The detailed structure of data pack doesn't have to be discussed in this time.
If it is really required, we can improve the structure. 

> Umbrella ticket for accelerating query speed through memory cached table
> ------------------------------------------------------------------------
>
>                 Key: TAJO-472
>                 URL: https://issues.apache.org/jira/browse/TAJO-472
>             Project: Tajo
>          Issue Type: New Feature
>          Components: distributed query plan, physical operator
>            Reporter: Min Zhou
>            Assignee: Min Zhou
>         Attachments: TAJO-472 Proposal.pdf
>
>
> Previously, I was involved as a technical expert into an in-memory database for on-line
businesses in Alibaba group. That's  an internal project, which can do group by aggregation
on billions of rows in less than 1 second.  
> I'd like to apply this technology into tajo, make it much faster than it is. From some
benchmark,  we believe that spark&shark currently is the fastest solution among all the
open source interactive query system , such as impala, presto, tajo.  The main reason is that
it benefit from in-memory data. 
> I will take memory cached table as my first step to  accelerate query speed of tajo.
Actually , this is the reason why I concerned at table partition during Xmas and new year
holidays. 
> Will submit a proposal soon.
>   



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