TPC-DS is just a benchmark, and it is not test sets. For just test cases, why should we aim at TPC-DS? They are not proper as well as are overkill for this purpose.
> For the TPC-DS, Tajo PMC doesn't make any committment in Roadmap already. > TPC-DS does not mean anything to TAJO roadmap. They are NOT TRUE. As you already know, WITH, IN/EXIST subquery, and scalar subquery are already on our roadmap. If they are supported, most of TPC-DS queries will work naturally. I'm concerning with your intension, saying we do not consider TPC-DS. On Sat, Mar 21, 2015 at 4:38 PM, Dongjoon Hyun <[email protected]> wrote: > Hyunsik, TPC-DS is not important. It's just a way to see Tajo Maturity as a > SQL engine. TPC-DS does not mean anything to TAJO roadmap. > > More specifically, the importance is the same with TPC-H, however Tajo > handled TPC-H well now, doesn't it? So, we need just another testsuite to > see how Tajo handle SQL(including WITH/IN/EXISTS) clause well. I think you > agree that in TAJO-1410. > > TPC defines > - TPC-H: TPC-H is an ad-hoc, decision support benchmark. > - TPC-DS: TPC Benchmark™DS (TPC-DS): The New Decision Support Benchmark > Standard > > In these days, TPC-DS is replacing the ancient TPC-H from real site > customers. > The main reason is based on the lack of TPC-H. TPC-H became a basic level. > > Could you tell me if you have some other testcases in mind, except TPC-DS? > > Dongjoon. > > On Sun, Mar 22, 2015 at 3:58 AM, Hyunsik Choi <[email protected]> wrote: > >> Could you tell me why you think TPC-DS is important? >> >> On Saturday, March 21, 2015, Dongjoon Hyun <[email protected]> wrote: >> >> > Oh, that was an expression of my regret about my weak pull-requests. >> There >> > exists no offence. It's a duty. I hope you didn't waste your time much >> due >> > to my stupid learning cost. >> > >> > After Hyunsik's direct advice, I have studied Tajo Jira more and >> understand >> > what you mean slightly more. Now I understand many speedup issues, e.g. >> > offheap-based scanner, zero-copy physical layer processing. For newbies >> > like me, we need more men like you. >> > >> > For the TPC-DS, Tajo PMC doesn't make any committment in Roadmap >> already. I >> > respect the current roadmap. You need not worry about that. It's my >> > personal hope as I mentioned before in this mailing list. Here is more >> > recent another report about TPC-DS. (It's consistent with the report >> shared >> > by Hyunsik.) >> > >> > >> > >> https://developer.ibm.com/hadoop/blog/2014/12/02/big-sql-3-0-hadoop-ds-benchmark-performance-isnt-everything/ >> > >> > >> > Thank you all. >> > >> > Warmly, >> > Dongjoon. >> > >>
