yes ,indeed
在 2010-03-31三的 09:56 +0800，Cui tony写道：
> Hi,
> Did all key-value pairs of the map output, which have the same key, will
> be sent to the same reducer tasknode?
Hi all，
Does automatic restart and failover of the NameNode software to
another machine available in hadoop 0.20.2？
I downloaded Hadoop 0.20.0 and used the src/contrib/ec2/bin scripts to
launch a Hadoop cluster on Amazon EC2, after building a new Hadoop
0.20.0 AMI.
I launched an instance with my new Hadoop 0.20.0 AMI, then logged in and
ran the following to launch a new cluster:
root(/vol/hadoop-0.20.0)> bin/l
I have finished configuring the Hadoop in cluster environment as
follows:
1. maoh...@maohong-desktop:~/Software/Development/Hadoop/hadoop-0.20.2$
bin/start-all.sh
2. starting namenode, logging
to
/home/maohong/Software/Development/Hadoop/hadoop-0.20.2/bin/../logs/hadoop-maoho
10-03-23二的 21:23 +0800，liu chang写道：
> On Tue, Mar 23, 2010 at 9:11 PM, 毛宏 wrote:
> > I use "file /usr/bin/env" to check if /usr/bin/env is present in my
> > system and the answer is yes.
> > But why does it still display
> > datanode1:/usr/bin/env : bash: No
yes I can, I am using Ubuntu 9.10 in my namenode, debian 4.0 in my
datanode.
They all have /usr/bin/env
在 2010-03-23二的 21:23 +0800，liu chang写道：
> On Tue, Mar 23, 2010 at 9:11 PM, 毛宏 wrote:
> > I use "file /usr/bin/env" to check if /usr/bin/env is present in my
gt;
> > file /bin/env
> >
> > If you have /bin/env but not /usr/bin/env, you can make a symbolic link for
> > it:
> >
> > ln -s /usr/bin/env /bin/env
> >
> > You need to execute the command above as root.
> >
> > Liu Chang
> >
>
Hi all,
I install Hadoop in three machines, my pc is the namenode, two other pc
are the datanodes, but when I execute bin/start-dfs.sh, it displays
these two line as follows:
datanode1: /usr/bin/env: bash: No such
file or directory
I read from 《Towards Optimizing Hadoop Provisioning in the Cloud 》
saying that "mapred.tasktracker.map.tasks.maximum and
mapred.tasktracker.reduce.tasks.maximum respectively set the maximum
number of parallel mappers and reducers that can run on a Hadoop
slave".
It means that a tasktracker in H
