mapreduce.tasktracker.map.tasks.maximum property not working with YARN

[anil gupta <an...@gmail.com>]

Hi All,

I have a hadoop2.0.0-alpha hadoop/hbase cluster runnning on CentOS6.0. The
cluster has 4 admin nodes and 8 data nodes. I would only like run one
mapper/reducer at a time on each nodemanager. For doing that i had set the
following properties in my mapred-site.xml. However setting this property
is not having any impact on YARN, YARN is running simultaneously 8 map
tasks on one NodeManager.

<property>
  <name>mapreduce.tasktracker.map.tasks.maximum</name>
  <value>1</value>
</property>
<property>
  <name>mapreduce.tasktracker.reduce.tasks.maximum</name>
  <value>1</value>
</property>

Is there some other property i need to set for YARN?
-- 
Thanks & Regards,
Anil Gupta

Re: mapreduce.tasktracker.map.tasks.maximum property not working with YARN

[anil gupta <an...@gmail.com>]

Hi Folks,

I would appreciate if someone can share their views on the problem below. I
am going to file a JIra for the same. If someone thinks that i am
missing(or my conf is incorrect) something then please let me know.

Thanks,
Anil Gupta


On Wed, Aug 1, 2012 at 10:56 AM, anil gupta <an...@gmail.com> wrote:

>
> Hi All,
>
> I have a hadoop2.0.0-alpha hadoop/hbase cluster runnning on CentOS6.0. The
> cluster has 4 admin nodes and 8 data nodes. I would only like run one
> mapper/reducer at a time on each nodemanager. For doing that i had set the
> following properties in my mapred-site.xml. However setting this property
> is not having any impact on YARN, YARN is running simultaneously 8 map
> tasks on one NodeManager.
>
> <property>
>   <name>mapreduce.tasktracker.map.tasks.maximum</name>
>   <value>1</value>
> </property>
> <property>
>   <name>mapreduce.tasktracker.reduce.tasks.maximum</name>
>   <value>1</value>
> </property>
>
> Is there some other property i need to set for YARN?
> --
> Thanks & Regards,
> Anil Gupta
>



-- 
Thanks & Regards,
Anil Gupta