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From Hyunsik Choi <hyun...@apache.org>
Subject Re: Brief Evaluations of Tajo on Swift
Date Wed, 11 Mar 2015 02:48:27 GMT
The presentation material you've added seems to include English
contents throughout the slide. I think that It can be listed on the
public presentation.

Best regards,
Hyunsik

On Tue, Mar 10, 2015 at 6:20 PM, Jihoon Son <jihoonson@apache.org> wrote:
> I've added it.
> Thanks!
> Jihoon
>
> On Wed, Mar 11, 2015 at 9:28 AM Hyunsik Choi <hyunsik@apache.org> wrote:
>
>> 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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