cluster is..
2 namenodes ( ha cluster ), 3 jounalnodes, n datanodes
I regularly back up the metadata(fsimage) file. ( http://[namenode
address]:50070/imagetransfer?getimage=1amp;txid=latest )
How do I recover the namenode by using the metadata(fsimage)?
The timeout value is set by the following formula:
heartbeatExpireInterval = 2 * (heartbeatRecheckInterval)
+ 10 * 1000 * (heartbeatIntervalSeconds);
Note that heartbeatRecheckInterval is set by
dfs.namenode.heartbeat.recheck-interval property
(5*60*1000 [msec] by
A server with more than one hard drive is one node only.
Sam
On 7/7/14, 9:50 AM, Adaryl Bob Wakefield, MBA
adaryl.wakefi...@hotmail.com wrote:
If you have a server with more than one hard drive is that one node or n
nodes where n = the number of hard drives?
B.
Hi,
We used a commercial FT and scheduler tool in clustered mode.
This was a traditional active-active cluster that supported multiple
protocols like FTPS etc.
Now I am interested in evaluating a Distributed way of crawling FTP
sites and downloading files using Hadoop. I thought
please follow along the steps
• Shutdown all Hadoop daemons on all servers in the cluster.
• Copy NameNode metadata onto the secondary NameNode and copy the entire
directory tree to the secondary NameNode.
• Modify the core-site.xml file, making the secondary NameNode server the
new NameNode
When a daemon process is started, the process ID of the process is captured
in a pid file. It is used for following purposes:
- During a daemon startup, the existence of pid file is used to determine
that the process is already running.
- When a daemon is stooped, hadoop scripts sends kill TERM
http://www.cs.cmu.edu/~./enron/
Not sure the uncompressed size but pretty sure it’s over a Gig.
B.
From: navaz
Sent: Monday, July 07, 2014 6:22 PM
To: user@hadoop.apache.org
Subject: Huge text file for Hadoop Mapreduce
Hi
I am running basic word count Mapreduce code. I have download a
Thank you for answer.
However, my Hadoop version is 2.4.1.
Cluster does not have secondary namenode .
How do I recover the namenode( hadoop version 2.4.1 ) by using the
metadata(fsimage) ?
-Original Message-
From: Raj K Singhlt;rajkrrsi...@gmail.comgt;
To:
Hi All,
How can copy a certain hdfs block (given the file name, start and end
bytes) from one node to another node ?
Thanks
Yehia
Can you outline why one would want to do that? The blocks are disposable so
it is strange to manipulate them directly.
On Jul 7, 2014 8:16 PM, Yehia Elshater y.z.elsha...@gmail.com wrote:
Hi All,
How can copy a certain hdfs block (given the file name, start and end
bytes) from one node to
hi,maillist:
i want to check all hadoop cluster component process is alive or die
,i do not know if it can do like check zookeeper node from one
machine?thanks
look at nagios or ganglia for monitoring.
On Tue, Jul 8, 2014 at 8:16 AM, ch huang justlo...@gmail.com wrote:
hi,maillist:
i want to check all hadoop cluster component process is alive or die
,i do not know if it can do like check zookeeper node from one
machine?thanks
--
Nitin
Configuration conf = getConf();
conf.setLong(mapreduce.input.fileinputformat.split.maxsize,1000);
// u can set this to some small value (in bytes) to ensure your file will
split to multiple mappers , provided the format is not un-splitable format
like .snappy.
On Tue, Jul 8, 2014 at 7:32
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