Lars Volker 0ad935b63c IMPALA-2979: Fix scheduling on remote hosts ...

Also fixes: IMPALA-2400, IMPALA-3043

This change fixes scheduling scan-ranges on remote hosts by adding
remote backend selection capability to SimpleScheduler. Prior to this
change the scheduler would try to select a local backend even when
remote scheduling was requested.

This change also allows pseudo-randomized remote backend selection to
prevent convoying, which could happen when different independent
schedulers had the same internal state, e.g. after a cluster restart. To
enable the new behavior set the query option SCHEDULE_RANDOM_REPLICA to
true.

This change also fixes IMPALA-2400: Unpredictable locality behavior
for reading Parquet files

This change also fixes IMPALA-3043: SimpleScheduler does not handle
hosts with multiple IP addresses correctly

This change also does some clean-up in scheduler.h and
simple-scheduler.{h,cc}.

Change-Id: I044f83806fcde820fcb38047cf6b8e780d803858
Reviewed-on: http://gerrit.cloudera.org:8080/3771
Reviewed-by: Lars Volker <lv@cloudera.com>
Reviewed-by: Sailesh Mukil <sailesh@cloudera.com>
Tested-by: Internal Jenkins

2016-07-26 21:44:37 +00:00

..

function-registry

IMPALA-2459: Implement next_day date/time UDF

2016-06-09 04:30:48 -07:00

thrift

IMPALA-2979: Fix scheduling on remote hosts

2016-07-26 21:44:37 +00:00

.gitignore

Implmented opcode registry. Added substr() and pi() functions. Added backend testing to buildall.sh

2011-11-20 13:44:41 -08:00