hadoop-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Sandy Ryza <sandy.r...@cloudera.com>
Subject Re: Question regarding hadoop jar command usage
Date Wed, 13 Mar 2013 17:14:12 GMT
Hi Kay,

The jar is just executed locally.  If the jar fires up a mapreduce job and
sets itself as the job jar, then mapreduce will handle copying it to the
nodes that will use it.

-Sandy

On Wed, Mar 13, 2013 at 9:01 AM, KayVajj <vajjalak009@gmail.com> wrote:

> I have a question regarding the hadoop jar command. In a cluster of say
> nodes n1,n2...n100
>
> the node n1 has jar Myjar on its local file system.
>
> If I run the command
> hadoop jar local/path/to/Myjar Myclass other-args
>
> Is the MR job executed just on n1 or any arbitrary node n1..n100?
>
> If it is any arbitrary node, since Myjar exists only on n1. Is the jar
> copied across all nodes on the cluster to run the MR code.
>
>
>
>
>

Mime
View raw message