Praveenesh,
On Mon, Jan 9, 2012 at 11:38 AM, praveenesh kumar wrote:
> Hi,
> Masters file in $HADOOP_HOME/conf tells you about where exactly the
> SecondaryNamenode deamon should run. Correct me please if I am wrong.
Correct. But do not run > 1 SNN. Depending on the version of HDFS you
use, you
Hi,
Masters file in $HADOOP_HOME/conf tells you about where exactly the
SecondaryNamenode deamon should run. Correct me please if I am wrong.
My doubt is Do all Datanodes should know where secondary namenode is
running or Only namenode should be knowing where secondary namenode is
running ?
The re
Hi Praveenesh,
You just need to restart the hadoop services. Reformatting the namenode
causes the lose of metadata and there by loss of data residing in datanodes.
Regards,
Srinivas,
Cloudwick Technologies.
On Mon, Jan 9, 2012 at 12:26 AM, praveenesh kumar wrote:
> Hey Guys,
>
> Do I need to fo
Praveenesh,
*Never* reformat your namenode unless you want to blow all your files away and
start afresh. No configuration change will ever demand that you reformat your
NameNode.
* Block size is per-file, so you can change this config to affect the default
of all new files, but to change older
Hey Guys,
Do I need to format the namenode again if I am changing some HDFS
configurations like blocksize, checksum, compression codec etc or is there
any other way to enforce these new changes in the present cluster setup ?
Thanks,
Praveenesh
It's already in there ... don't worry about it, I'm submitting the first
job then the second job manually for now.
export CLASSPATH=/home/mark/hadoop-0.20.2/conf:$CLASSPATH
export CLASSPATH=/home/mark/hadoop-0.20.2/lib:$CLASSPATH
export
CLASSPATH=/home/mark/hadoop-0.20.2/hadoop-0.20.2-core.jar:/ho
What's the classpath of the java program submitting the job? It has to
have the configuration directory (e.g. /opt/hadoop/conf) in there or
it won't pick up the correct configs.
-Joey
On Sun, Jan 8, 2012 at 12:59 PM, Mark question wrote:
> mapred-site.xml:
>
>
> mapred.job.tracker
> loc
mapred-site.xml:
mapred.job.tracker
localhost:10001
mapred.child.java.opts
-Xmx1024m
mapred.tasktracker.map.tasks.maximum
10
Command is running a script which runs a java program that submit two jobs
consecutively insuring waiting for the first job
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- Amit
Amit Sangroya
PhD Student at INRIA
Lyon Area, France
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