what version of cassandra and java? Regards,
Ryan Svihla > On Jul 7, 2016, at 4:51 PM, Yuan Fang <y...@kryptoncloud.com> wrote: > > 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. Reiydelle >>>> USA (+1) 415.501.0198 >>>> London (+44) (0) 20 8144 9872 >>>> >>>>> 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. Reiydelle >>>>>> USA (+1) 415.501.0198 >>>>>> London (+44) (0) 20 8144 9872 >>>>>> >>>>>>> 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 >>>>>>> >>>>>> >>>>> >>>> >>> >
