Yes, here is my stress test result: Results: op rate : 12200 [WRITE:12200] partition rate : 12200 [WRITE:12200] row rate : 12200 [WRITE:12200] latency mean : 16.4 [WRITE:16.4] latency median : 7.1 [WRITE:7.1] latency 95th percentile : 38.1 [WRITE:38.1] latency 99th percentile : 204.3 [WRITE:204.3] latency 99.9th percentile : 465.9 [WRITE:465.9] latency max : 1408.4 [WRITE:1408.4] Total partitions : 1000000 [WRITE:1000000] Total errors : 0 [WRITE:0] total gc count : 0 total gc mb : 0 total gc time (s) : 0 avg gc time(ms) : NaN stdev gc time(ms) : 0 Total operation time : 00:01:21 END
On Thu, Jul 7, 2016 at 2:49 PM, Ryan Svihla <r...@foundev.pro> wrote: > Lots of variables you're leaving out. > > Depends on write size, if you're using logged batch or not, what > consistency level, what RF, if the writes come in bursts, etc, etc. > However, that's all sort of moot for determining "normal" really you need a > baseline as all those variables end up mattering a huge amount. > > I would suggest using Cassandra stress as a baseline and go from there > depending on what those numbers say (just pick the defaults). > > Sent from my iPhone > > On Jul 7, 2016, at 4:39 PM, Yuan Fang <y...@kryptoncloud.com> wrote: > > yes, it is about 8k writes per node. > > > > On Thu, Jul 7, 2016 at 2:18 PM, daemeon reiydelle <daeme...@gmail.com> > wrote: > >> Are you saying 7k writes per node? or 30k writes per node? >> >> >> *.......* >> >> >> >> *Daemeon C.M. ReiydelleUSA (+1) 415.501.0198 >> <%28%2B1%29%20415.501.0198>London (+44) (0) 20 8144 9872 >> <%28%2B44%29%20%280%29%2020%208144%209872>* >> >> On Thu, Jul 7, 2016 at 2:05 PM, Yuan Fang <y...@kryptoncloud.com> wrote: >> >>> writes 30k/second is the main thing. >>> >>> >>> On Thu, Jul 7, 2016 at 1:51 PM, daemeon reiydelle <daeme...@gmail.com> >>> wrote: >>> >>>> Assuming you meant 100k, that likely for something with 16mb of storage >>>> (probably way small) where the data is more that 64k hence will not fit >>>> into the row cache. >>>> >>>> >>>> *.......* >>>> >>>> >>>> >>>> *Daemeon C.M. ReiydelleUSA (+1) 415.501.0198 >>>> <%28%2B1%29%20415.501.0198>London (+44) (0) 20 8144 9872 >>>> <%28%2B44%29%20%280%29%2020%208144%209872>* >>>> >>>> On Thu, Jul 7, 2016 at 1:25 PM, Yuan Fang <y...@kryptoncloud.com> >>>> wrote: >>>> >>>>> >>>>> >>>>> I have a cluster of 4 m4.xlarge nodes(4 cpus and 16 gb memory and >>>>> 600GB ssd EBS). >>>>> I can reach a cluster wide write requests of 30k/second and read >>>>> request about 100/second. The cluster OS load constantly above 10. Are >>>>> those normal? >>>>> >>>>> Thanks! >>>>> >>>>> >>>>> Best, >>>>> >>>>> Yuan >>>>> >>>>> >>>> >>> >> >
