Re: [HACKERS] CUDA Sorting

2011-09-20 Thread Nulik Nol
> > I already did some benchmarks with GPU sorting (not in pgsql), and > measured total sort times, copy bandwidth and energy usage, and got > some exciting results: Was that qsort implementation on CPU cache friendly and optimized for SSE ? To make a fair comparison you have to take the best CPU i

Re: [HACKERS] CUDA Sorting

2011-09-19 Thread Nulik Nol
On Mon, Sep 19, 2011 at 7:11 AM, Vitor Reus wrote: > Hello everyone, > > I'm implementing a CUDA based sorting on PostgreSQL, and I believe it > can improve the ORDER BY statement performance in 4 to 10 times. I > already have a generic CUDA sort that performs around 10 times faster > than std qso

[HACKERS] fsyncing data to disk

2011-09-09 Thread Nulik Nol
Hi, this is not exactly a Postgresql question, but an input from hackers list like this would be invaluable for me. I am coding my own database engine, and I decided to do not implement transaction engine because it implies too much code. But to achieve the Durability of ACID I need a 100% reliable