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From Hyunsik Choi <hyun...@apache.org>
Subject Re: Brief Evaluations of Tajo on Swift
Date Wed, 11 Mar 2015 00:28:03 GMT
Great work! Thank you for your effort.

Could you add your materials to the wiki page at
https://cwiki.apache.org/confluence/display/TAJO/Presentations?

It will be helpful to those who want to find Tajo documentation materials.

Best regards,
Hyunsik


On Thu, Feb 26, 2015 at 9:37 PM, Jihoon Son <jihoonson@apache.org> wrote:
> Hi guys,
> I have conducted some brief performance evaluations of Tajo on Swift, and
> would like to share the results.
>
> I conducted two kinds of experiments; The first experiment was to compare
> the performance of Tajo with on another distributed storage, i.e., HDFS.
> And the second experiment was the scalability test of Swift.
>
> Interestingly, the scan performance on Swift is slower more than two times
> than that on HDFS. In addition, the task scheduling time on Swift is much
> greater than that on HDFS, which means the query initialization cost is
> very high. You can find the detailed results at the following link.
>
> http://www.slideshare.net/jihoonson/apache-on-tajo-bringing-sql-to-the-openstack-world
>
> Based on those evaluation results, I would like to add some new features to
> improve the performance of Tajo on Swift. For example, progressive task
> scheduling can mitigate the query initialization cost on Swift. In
> addition, we need to support location-aware computing for segmented Swift
> objects. Sooner or later, I will create issues on Jira.
>
> Best Regards,
> Jihoon

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