Hi all,
I have developed a web application using Tomcat. In my app, a
client submit a request, and the server read data from HBase then
return these data as a response. But now I can only use shell and
eclipse plugin to invoke program on Hadoop. Who can tell me how to
access data in Hbase
Kayla Jay a écrit :
I'm trying to figure out why I need to use HOD vs. trying to run multiple
jobs at the same time on the same set of resources. Is it possible to run
multiple hadoop jobs at the same time on the same set of input data?
I tried to run different jobs on the same set of data
Thank you for your clarification!
One more question here,
The API doc says...
DistributedCache is a facility provided by the Map-Reduce framework to
cache files (text, archives, jars etc.) needed by applications.
My question is...
Is it also possible distribute some some binary files (to be
Hi all,
We plan to upgrade our cluster from Hadoop 0.14.4 directly to 0.16.4
(skipping the 0.15 step).
Is there anything that prevent from upgrading from 0.14 to 0.16? Is the
simplified procedure described on the wiki page applicable in that case?
Regarding 0.16.4, I couldn't find any
On 5/22/08 1:54 PM, Stuart Sierra [EMAIL PROTECTED] wrote:
I've tried using JSON to store structured data in TextOutputFormat,
which works but is not very efficient. Any better suggestions?
On Thu, May 22, 2008 at 5:21 PM, Ted Dunning [EMAIL PROTECTED] wrote:
What is it that makes you not
Thanks you guys for the feedback. I will try all options you have both
suggested and see how it goes.
Will post if I run into any problems.
Thanks again
- Original Message
From: Brice Arnould [EMAIL PROTECTED]
To: core-user@hadoop.apache.org
Sent: Friday, May 23, 2008 3:53:12 AM
Can you attach initialization part of NameNode?
thanks,
Raghu.
C G wrote:
We've recently upgraded from 0.15.0 to 0.16.4. Two nights ago we had a problem
where DFS nodes could not communicate. After not finding anything obviously
wrong we decided to shut down DFS and restart. Following
2008-05-23 11:53:25,377 INFO org.apache.hadoop.dfs.NameNode: STARTUP_MSG:
/
STARTUP_MSG: Starting NameNode
STARTUP_MSG: host = primary/10.2.13.1
STARTUP_MSG: args = []
STARTUP_MSG: version = 0.16.4-dev
STARTUP_MSG: build =
On May 23, 2008, at 9:51 AM, Ted Dunning wrote:
Relative to thrift, JSON has the advantage of not requiring a
schema as well
as the disadvantage of not having a schema. The advantage is that
the data
is more fluid and I don't have to generate code to handle the
records. The
disadvantage
Hi,
I was wondering is it possible to submit MapReduce job on remote Hadoop cluster.
(i.e) Submitting the job from the machine which doesn't have Hadoop installed
and submitting to different machine where Hadoop installed.
Is it possible to do this?
I guess at least data can be uploaded to HDFS
Both are possible. You may have to have access to the data and task nodes
for some operations. If you can see all of the nodes in your cluster, you
should be able to do everything.
On 5/23/08 1:46 PM, Natarajan, Senthil [EMAIL PROTECTED] wrote:
Hi,
I was wondering is it possible to submit
To write the data, you have a few choices:
- put some kind of proxy in that can see the cluster and write to it using
DAV or HTTP post. It would then do a normal HDFS write. There was a DAV
client for HDFS at one time.
- make the cluster visible and install the hadoop.jar and configuration
Ted Dunning wrote:
- in order to submit the job, I think you only need to see the job-tracker.
Somebody should correct me if I am wrong.
No, you also need to be able to write the job.xml, job.jar, and
job.split into HDFS. Someday perhaps we'll pass these via RPC to the
jobtracker and have
You could set up an rpc server on a machine that does have hadoop installed.
Then, your clients could submit rpc requests to this machine, and your rpc
server would resubmit the job to hadoop.
-Michael
On 5/23/08 2:10 PM, Natarajan, Senthil [EMAIL PROTECTED] wrote:
The client machine doesn't
The following works for me
set JAVA_HOME=/cygdrive/c/Progra~1/Java/jdk1.5.0_14
Nicholas
- Original Message
From: vatsan [EMAIL PROTECTED]
To: core-user@hadoop.apache.org
Sent: Friday, May 23, 2008 5:41:05 PM
Subject: JAVA_HOME Cygwin problem (solution doesn't work)
I have installed
Ugh, that solved the problem. Thanks Dhruba!
Thanks,
C G
Dhruba Borthakur [EMAIL PROTECTED] wrote:
If you look at the log message starting with STARTUP_MSG: build
=... you will see that the namenode and good datanode was built by CG
whereas the bad datanodes were compiled by hadoopqa!
16 matches
Mail list logo
