Cool!
On Tue, May 5, 2015 at 3:39 AM, Tomer Shiran <[email protected]> wrote: > http://drill.apache.org/docs/drill-introduction/#videos > > > > > On May 4, 2015, at 3:10 PM, Ted Dunning <[email protected]> wrote: > > > > Is that video linked from the web site? Looks like a really great > resource. > > > > > > > >> On Mon, May 4, 2015 at 6:23 PM, Hao Zhu <[email protected]> wrote: > >> > >> https://www.youtube.com/watch?v=kG6vzsk8T7E > >> This presentation contains lots of details for query execution plan. > >> > >> On Mon, May 4, 2015 at 7:10 AM, Carol McDonald <[email protected]> > >> wrote: > >> > >>> https://cwiki.apache.org/confluence/display/DRILL/EXPLAIN+Commands > >>> > >>>> On Mon, May 4, 2015 at 3:46 AM, George Lu <[email protected]> > wrote: > >>>> > >>>> Dear all, > >>>> > >>>> I have deployed Drill on several nodes in the cluster and experienced > >> the > >>>> query. > >>>> I have some questions: > >>>> > >>>> 1) Can anyone show me some links to read for the Drill execution plan, > >>> how > >>>> to understand it. > >>>> > >>>> 2) I execute some group by query on HBase several times, some time > very > >>>> fast, while sometimes very slow, and even get exception, like "Query > >>>> failed: RemoteRpcException: Failure while running fragment., Command > >>> failed > >>>> while establishing connection. Failure type CONNECTION. [ > >>>> 2ba2092f-53ed-480a-9f23-f89b6e6a91a0 on test6:31010 ] > >>>> [ 2ba2092f-53ed-480a-9f23-f89b6e6a91a0 on test6:31010 ] > >>>> > >>>> > >>>> java.lang.RuntimeException: java.sql.SQLException: Failure while > >>> executing > >>>> query. > >>>> at sqlline.SqlLine$IncrementalRows.hasNext(SqlLine.java:2514) > >>>> at sqlline.SqlLine$TableOutputFormat.print(SqlLine.java:2148) > >>>> at sqlline.SqlLine.print(SqlLine.java:1809) > >>>> at sqlline.SqlLine$Commands.execute(SqlLine.java:3766) > >>>> at sqlline.SqlLine$Commands.sql(SqlLine.java:3663) > >>>> at sqlline.SqlLine.dispatch(SqlLine.java:889) > >>>> at sqlline.SqlLine.begin(SqlLine.java:763) > >>>> at sqlline.SqlLine.start(SqlLine.java:498) > >>>> at sqlline.SqlLine.main(SqlLine.java:460)" > >>>> > >>>> I am not sure whether Drill uses pre-execute like in Hadoop or auto > >>> failure > >>>> detection. If some of the execution node failed, what will happen? If > >>> some > >>>> node is under high pressure for other task, and what will happen if > >> this > >>>> node becomes the one who drags the whole execution slow? > >>>> > >>>> Thanks! > >>>> > >>>> George > >> >
