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From "Till Westmann" <ti...@apache.org>
Subject Re: Histograms and statistics on Asterix
Date Fri, 18 Dec 2015 19:12:27 GMT
Sounds like a good idea to me - especially if the doc has been mentioned 
on this list :)

If/when the code actually gets committed into master, I also think that 
we should transfer to content to ASF infrastructure (site/wiki).

Cheers,
Till

On 18 Dec 2015, at 19:37, Jianfeng Jia wrote:

> Should we link all these kind of docs to wiki? (just the sharable 
> link, don’t have to copy the content.) :-)
>
>> On Dec 18, 2015, at 10:18 AM, Ildar Absalyamov 
>> <ildar.absalyamov@gmail.com> wrote:
>>
>> Hi Wail,
>>
>> I do have some doc which can give you some idea of how stats 
>> collection will work 
>> https://docs.google.com/document/d/12aP8Pzp68b_HxJe-svFmG9dHFX6zliGw-ErNSd_Av3I/edit?usp=sharing

>> <https://docs.google.com/document/d/12aP8Pzp68b_HxJe-svFmG9dHFX6zliGw-ErNSd_Av3I/edit?usp=sharing>.

>> But it does not describe the statistical synopsis format. We were 
>> planning to use wavelets instead to histograms for these LSM-based 
>> statistics. Let me know if you want to know more on how wavelets work 
>> and why they should be used.
>>
>>> On Dec 18, 2015, at 07:23, Wail Alkowaileet <wael.y.k@gmail.com> 
>>> wrote:
>>>
>>> Good to know.
>>> Is there any type of design document ?
>>>
>>> P.S. Sattam told me that there was some sort of a comparative study 
>>> shows
>>> the difference in performance of open vs. closed types. Where can I 
>>> find it?
>>>
>>> Thanks!
>>>
>>> On Thu, Dec 17, 2015 at 9:16 PM, Mike Carey <dtabass@gmail.com> 
>>> wrote:
>>>
>>>> Ildar is working on that (camping on the LSM lifecycle) and Wenhai 
>>>> is
>>>> doing some work on histograms that's intended for in-flight use 
>>>> during
>>>> query processing (to do dynamic partitioning, e.g., during parallel 
>>>> sorts
>>>> and joins).
>>>>
>>>>
>>>> On 12/17/15 1:53 AM, Wail Alkowaileet wrote:
>>>>
>>>>> Hi Devs,
>>>>>
>>>>> I want to ask if there's any on going work on building histograms 
>>>>> and
>>>>> stats
>>>>> for Asterix ?
>>>>>
>>>>
>>>>
>>>
>>>
>>> -- 
>>>
>>> *Regards,*
>>> Wail Alkowaileet
>>
>> Best regards,
>> Ildar
>>
>
>
>
> Best,
>
> Jianfeng Jia
> PhD Candidate of Computer Science
> University of California, Irvine

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