i tried "set mapred.map.tasks=30" , it does not work, it seems shark does not support this setting. i also tried "SET mapred.max.split.size=64000000", it does not work,too. is there other way to control task number in shark CLI ?
2014-05-26 10:38 GMT+08:00 Aaron Davidson <ilike...@gmail.com>: > You can try setting "mapred.map.tasks" to get Hive to do the right thing. > > > On Sun, May 25, 2014 at 7:27 PM, qingyang li <liqingyang1...@gmail.com>wrote: > >> Hi, Aaron, thanks for sharing. >> >> I am using shark to execute query , and table is created on tachyon. I >> think i can not using RDD#repartition() in shark CLI; >> if shark support "SET mapred.max.split.size" to control file size ? >> if yes, after i create table, i can control file num, then I can >> control task number. >> if not , do anyone know other way to control task number in shark CLI? >> >> >> 2014-05-26 9:36 GMT+08:00 Aaron Davidson <ilike...@gmail.com>: >> >> How many partitions are in your input data set? A possibility is that >>> your input data has 10 unsplittable files, so you end up with 10 >>> partitions. You could improve this by using RDD#repartition(). >>> >>> Note that mapPartitionsWithIndex is sort of the "main processing loop" >>> for many Spark functions. It is iterating through all the elements of the >>> partition and doing some computation (probably running your user code) on >>> it. >>> >>> You can see the number of partitions in your RDD by visiting the Spark >>> driver web interface. To access this, visit port 8080 on host running your >>> Standalone Master (assuming you're running standalone mode), which will >>> have a link to the application web interface. The Tachyon master also has a >>> useful web interface, available at port 19999. >>> >>> >>> On Sun, May 25, 2014 at 5:43 PM, qingyang li >>> <liqingyang1...@gmail.com>wrote: >>> >>>> hi, Mayur, thanks for replying. >>>> I know spark application should take all cores by default. My question >>>> is how to set task number on each core ? >>>> If one silce, one task, how can i set silce file size ? >>>> >>>> >>>> 2014-05-23 16:37 GMT+08:00 Mayur Rustagi <mayur.rust...@gmail.com>: >>>> >>>> How many cores do you see on your spark master (8080 port). >>>>> By default spark application should take all cores when you launch it. >>>>> Unless you have set max core configuration. >>>>> >>>>> >>>>> Mayur Rustagi >>>>> Ph: +1 (760) 203 3257 >>>>> http://www.sigmoidanalytics.com >>>>> @mayur_rustagi <https://twitter.com/mayur_rustagi> >>>>> >>>>> >>>>> >>>>> On Thu, May 22, 2014 at 4:07 PM, qingyang li <liqingyang1...@gmail.com >>>>> > wrote: >>>>> >>>>>> my aim of setting task number is to increase the query speed, and >>>>>> I have also found " mapPartitionsWithIndex at >>>>>> Operator.scala:333<http://192.168.1.101:4040/stages/stage?id=17>" >>>>>> is costing much time. so, my another question is : >>>>>> how to tunning >>>>>> mapPartitionsWithIndex<http://192.168.1.101:4040/stages/stage?id=17> >>>>>> to make the costing time down? >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> 2014-05-22 18:09 GMT+08:00 qingyang li <liqingyang1...@gmail.com>: >>>>>> >>>>>> i have added SPARK_JAVA_OPTS+="-Dspark. >>>>>>> default.parallelism=40 " in shark-env.sh, >>>>>>> but i find there are only10 tasks on the cluster and 2 tasks each >>>>>>> machine. >>>>>>> >>>>>>> >>>>>>> 2014-05-22 18:07 GMT+08:00 qingyang li <liqingyang1...@gmail.com>: >>>>>>> >>>>>>> i have added SPARK_JAVA_OPTS+="-Dspark.default.parallelism=40 " in >>>>>>>> shark-env.sh >>>>>>>> >>>>>>>> >>>>>>>> 2014-05-22 17:50 GMT+08:00 qingyang li <liqingyang1...@gmail.com>: >>>>>>>> >>>>>>>> i am using tachyon as storage system and using to shark to query a >>>>>>>>> table which is a bigtable, i have 5 machines as a spark cluster, >>>>>>>>> there are >>>>>>>>> 4 cores on each machine . >>>>>>>>> My question is: >>>>>>>>> 1. how to set task number on each core? >>>>>>>>> 2. where to see how many partitions of one RDD? >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> >
