Each task tracker should not execute more than one speculative task
-------------------------------------------------------------------
Key: HADOOP-2180
URL: https://issues.apache.org/jira/browse/HADOOP-2180
Project: Hadoop
Issue Type: Bug
Components: mapred
Reporter: Runping Qi
I noticed that sometimes, a tasktracker started 2 or three speculative mapper
tasks.
That seems counter productive. You want to speculative execution complete as
soon as possible.
Thus, it is better to spread speculative execution over multiple trackers. A
simple way to
achieve that is to limit the number of speculative eecution concurrently.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
