Re: Apache Spark Contribution

2017-02-02 Thread Shuai Lin
> > The goal of the project is to develop an algorithm that automatically > scales the cluster up and down based on the volume of data processed by the > application. By "scale the cluster up and down" do you mean: 1) adding/removing spark executors based on the load? How is that from the dynami

Re: A question about creating persistent table when in-memory catalog is used

2017-01-26 Thread Shuai Lin
e fetch the latest master. You are unable > to create such a hive serde table without Hive support. > > Thanks, > > Xiao Li > > > 2017-01-23 0:01 GMT-08:00 Shuai Lin : > >> Cool, thanks for the info. >> >> I think this is something we are going to change t

Re: A question about creating persistent table when in-memory catalog is used

2017-01-23 Thread Shuai Lin
difference is whether the metadata is >>> persistently stored or not. >>> >>> Thanks, >>> >>> Xiao Li >>> >>> 2017-01-22 11:14 GMT-08:00 Reynold Xin : >>> >>> I think this is something we are going to ch

A question about creating persistent table when in-memory catalog is used

2017-01-22 Thread Shuai Lin
no use. But I wonder if there are other good reasons for the current logic. If not, I would propose to raise an error when creating the table in the first place. Thanks! Regards, Shuai Lin (@lins05)

Re: What is mainly different from a UDT and a spark internal type that ExpressionEncoder recognized?

2017-01-02 Thread Shuai Lin
Disclaimer: I'm not a spark guru, and what's written below are some notes I took when reading spark source code, so I could be wrong, in which case I'd appreciate a lot if someone could correct me. > > Let me rephrase this. How does the SparkSQL engine call the codegen APIs > to > do the job of p

Re: SPARK-18689: A proposal for priority based app scheduling utilizing linux cgroups.

2016-12-03 Thread Shuai Lin
Sorry but I don't get the scope of the problem from your description. Seems it's an improvement for spark standalone scheduler (i.e. not for yarn or mesos)? On Sat, Dec 3, 2016 at 4:27 AM, Hegner, Travis wrote: > Hello, > > > I've just created a JIRA to open up discussion of a new feature that I