I omitted the wiki page link in the previous post. http://wiki.apache.org/tajo/Architecture
On Thu, Jun 13, 2013 at 6:17 PM, Hyunsik Choi <[email protected]> wrote: > Hi Camellia, > > I've added a wiki page which contains brief descriptions about > TaskRunnerLaunchImpl, TaskRunnerListenerImpl, Task and TaskRunner. I hope > that this page is useful for you. > > Also, PK and UNIQUE is not supported in the current implementation of > Tajo. Now, It would be good to omit EXT 3.2. Later, if Tajo supports PK and > UNIQUE, let's discuss that feature at that time. > > If you need additional documents about Tajo internals, feel free to ask me. > > Best regards, > Hyunsik > > > > On Sun, Jun 9, 2013 at 8:32 PM, Hyunsik Choi <[email protected]> wrote: > >> Hi camellia, >> >> Above all, I'm sorry for lack of documents. I'm reading your design >> document. That looks great. After I read it deeply, I'll give comment to >> you. Now, I leave answers of your questions. >> >> 1) I assumed that the join condition is specified in the FROM clause, >> not in the WHERE clause. Is this assumption fine? >> >> Actually, inner join conditions can be in either FROM clause or WHERE >> clause. Outer joins (qualified join) must be in FROM clause. So, the >> assumption is fine. >> >> 2) Are there any PK and UNIQUE constraints in TAJO? >> --> this is related to EXT 3.2 in the SDD, which otherwise is >> not possible >> >> Currently, there are no PK and UNIQUE constraints in Tajo. In the future, >> Tajo can have such constraints. I'll mention this work after I think it >> more. >> >> 3) At stage 5, DEC5.1. not sure if needed. >> >> If you build a global plan correctly, the plan will work in the cluster. >> I think that you don't need to add any extension to that part. >> >> 4) I need to understand better the link between TaskRunnerLaunchImpl, >> TaskRunnerListenerImpl, Task and TaskRunner. Is any documentation >> available, please? >> >> Actually, there is no available document for those parts. I'm sorry for >> this point. I'll make a comprehensive document for those parts. I'll take a >> Ph.D. oral defense at June 11. I'll share the document with you until June >> 13. After the defense, I can spend my whole time on Tajo. >> >> Best regards, >> Hyunsik >> >> >> On Sat, Jun 8, 2013 at 11:12 PM, camelia c <[email protected]>wrote: >> >>> Hello, >>> >>> I uploaded version 1 of the SDD and here are some items to discuss & >>> questions: >>> >>> 1) I assumed that the join condition is specified in the FROM clause, >>> not in the WHERE clause. Is this assumption fine? >>> >>> 2) Are there any PK and UNIQUE constraints in TAJO? >>> --> this is related to EXT 3.2 in the SDD, which otherwise is >>> not possible >>> >>> 3) At stage 5, DEC5.1. not sure if needed. >>> >>> 4) I need to understand better the link between TaskRunnerLaunchImpl, >>> TaskRunnerListenerImpl, Task and TaskRunner. Is any documentation >>> available, please? >>> >>> Next week, I plan to make a diagram as well and to take some example >>> queries and analyze the output of each stage of processing for them. >>> >>> I look forward to receiving Your feedback! >>> >>> Thank You! >>> Camelia >>> >>> >>> >>> --- On Sun, 6/2/13, Hyunsik Choi <[email protected]> wrote: >>> >>> From: Hyunsik Choi <[email protected]> >>> Subject: Re: [GSoc2013] - Outer Join >>> To: "tajo-dev" <[email protected]> >>> Date: Sunday, June 2, 2013, 9:59 PM >>> >>> Camelia, >>> >>> Wow! That site really looks great and very informative to us. >>> >>> - hyunsik >>> >>> >>> On Sat, Jun 1, 2013 at 5:12 AM, camelia c <[email protected]> >>> wrote: >>> >>> > >>> > Hello, >>> > >>> > This is the website I've created: >>> > >>> > https://sites.google.com/site/gsoc2013tajo34/home >>> > >>> > Thank You, >>> > Camelia >>> > >>> > >>> > --- On Thu, 5/30/13, Henry Saputra <[email protected]> wrote: >>> > >>> > From: Henry Saputra <[email protected]> >>> > Subject: Re: [GSoc2013] - Outer Join >>> > To: "[email protected]" <[email protected]> >>> > Date: Thursday, May 30, 2013, 3:00 PM >>> > >>> > You can link it to the Tajo wiki to help centralize the info about >>> GSOC for >>> > Tajo: http://wiki.apache.org/tajo/GSoC2013 >>> > >>> > Or you can create a page in the wiki for the design too. >>> > >>> > >>> > - Henry >>> > >>> > >>> > On Wed, May 29, 2013 at 7:41 PM, Hyunsik Choi <[email protected]> >>> wrote: >>> > >>> > > Hi camelia, >>> > > >>> > > That's good start. We could find the right way from your design >>> document >>> > > for this project. >>> > > >>> > > If your work is available online, I don't care. You can use Google >>> site, >>> > a >>> > > blog, or github. You also can share your work on your blog and some >>> code >>> > > repository like github. >>> > > >>> > > Best regards, >>> > > Hyunsik >>> > > >>> > > >>> > > On Thu, May 30, 2013 at 5:31 AM, camelia c <[email protected]> >>> > wrote: >>> > > >>> > > > Hello, >>> > > > >>> > > > I started working at the Software Design Document for this >>> project, as >>> > > > planned in the schedule for this period, and I hope that by the >>> start >>> > of >>> > > > next week( Monday, June 3rd) to have the version 1 of it to >>> discuss it >>> > > with >>> > > > You. >>> > > > >>> > > > Also, I was wondering how do You prefer that I keep track online >>> of the >>> > > > work at the project: a Google site or a blog or what else do You >>> > suggest? >>> > > > Something like a weekly diary of the progress at this project. >>> > > > >>> > > > Thank You very much, >>> > > > Camelia >>> > > > >>> > > > >>> > > > --- On Tue, 5/28/13, Henry Saputra <[email protected]> >>> wrote: >>> > > > >>> > > > From: Henry Saputra <[email protected]> >>> > > > Subject: Re: [GSoc2013] - Outer Join >>> > > > To: "[email protected]" <[email protected] >>> > >>> > > > Date: Tuesday, May 28, 2013, 1:14 AM >>> > > > >>> > > > Woot! >>> > > > >>> > > > On Monday, May 27, 2013, camelia c wrote: >>> > > > >>> > > > > Hello, >>> > > > > >>> > > > > Thank You very much for having accepted my proposal for the TAJO >>> > > > Project! >>> > > > > >>> > > > > Looking forward to plenty of good results working at TAJO, >>> > > > > Camelia >>> > > > > >>> > > > > >>> > > > >>> > > >>> > >>> >> >> >
