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From CharSyam <chars...@gmail.com>
Subject Re: Tajo C++ worker
Date Wed, 22 Jan 2014 12:53:13 GMT
IT's cool

2014년 1월 22일 수요일, Yu Dongmin<miniway@gmail.com>님이 작성한 메시지:

> Hello,
> I'm very glad to hear that Tajo is getting stable and production ready.
> Here's another news. Some of us might have have seen some Hyunsik's
> presentations commenting about an experimental project, c++ tajo worker.
> Recently, I've been working on the c++ worker, even though it is a little
> bit far from behind schedule than what I expected,
> it is able to communicate with Tajo Master and Query Master successfully.
> This is never a replacement of Java worker, but an exchangeable worker. We
> could use Java workers as is, C++ workers only, or mixed workers.
> It is designed as a vectorized execution engine hoping to process certain
> types of data structures very efficiently.
> These are the supported features right now.
> - Reading and parsing csv files in the hadoop data node.
> - Filtering rows within LLVM code generated evaluation
> - Simple scalar functions
> - Simple group by aggregation functions
> Now I'm working on 'order by' clause and doing profiling to get expected
> performance.
> Working on these stuffs, I hope community to allow creating a new git
> branch, say native_worker, cplus_worker or a nicer name, to make this
> project together.
> There's still a long way to go on this project, but it could be improved
> with help of the Tajo community.
> Thanks
> Min

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