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 <[email protected]> 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 <[email protected]> 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
