The comparison u are making btw SCVF and a custom filter u wrote? Or it is a CP impl vs custom filter/SCVF
Ur query seems select <cols> where cf:q1 = ?.. Wondering why u want a custom filter here and can not use SCVF. Can u pls give some more details? -Anoop- On Mon, Jun 16, 2014 at 4:40 PM, Vikram Singh Chandel < [email protected]> wrote: > Hi Dima > > Umm but as i know the working of CoProcessor and Custom filter are almost > same, they execute in similar fashion. > *But with Coprocessor i never got such high levels of CPU usage*. Though > Heap and JVM freeze are some issues with CoPro > > > On Mon, Jun 16, 2014 at 4:18 PM, Dima Spivak <[email protected]> wrote: > > > Hi Vikram, > > > > Maybe I'm misunderstanding your question, but isn't this expected > > since coprocessors do the heavy lifting at the level of the RegionServer > > whereas the client API means you hit a bottleneck as data is transferred > > from each RS to your gateway? > > > > -Dima > > > > On Monday, June 16, 2014, Vikram Singh Chandel < > > [email protected]> > > wrote: > > > > > Hi > > > I was working on way to find a substitute for coprocessor(because of > > > various issue with them) > > > so tried Custom Filters and found that the custom filter are much more > > > resource exhaustive (CPU) then coprocessor having single column value > > > filter. > > > > > > *Query: Get List of Publications for UDANDA (CF:Attributes > Col:Country) - > > > Result: 509 Records. * > > > > > > *Heap 3 Gb * > > > > > > > > > With Custom Filter > > > No of Scan Req > > > Max Heap(Mb) > > > Max CPU(%) > > > > > > > > > > > > 1 > > > 86.74 > > > 7.7 > > > 5 > > > 412 > > > 63.37 > > > 10 > > > 926 > > > 99 > > > *With Single Column Value Filter* > > > No of Scan Req > > > Max Heap > > > Max CPU > > > > > > > > > > > > 10 > > > 453.66 > > > 17.7 > > > Query ran for 15 minutes didn't get results. Terminated execution > > > > > > > > > > > > *Can anyone shed some light on this.* > > > -- > > > > > > *Regards* > > > > > > *VIKRAM SINGH CHANDEL* > > > > > > Please do not print this email unless it is absolutely > necessary,Reduce. > > > Reuse. Recycle. Save our planet. > > > > > > > > > -- > *Regards* > > *VIKRAM SINGH CHANDEL* > > Please do not print this email unless it is absolutely necessary,Reduce. > Reuse. Recycle. Save our planet. >
