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Jobtracker could only be replicated to 0 nodes instead of 1

Hello friends, I got the above error "jobtarcker.info could only be replicated to 0 nodes instead of 1 " Tried different Solutions found on web : * Formatted namenode * removed tmp Folder * cleaned uncessary logs just to have more space But still no success . What other Solutions could it be ? y

Re: Pseudo -distributed mode

at 4:32 PM, Sergey Murylev wrote: > Yes :) > > Pseudo-distributed mode is such configuration when we have some Hadoop > environment on single computer. > > On 12/08/14 18:25, sindhu hosamane wrote: > > Can Setting up 2 datanodes on same machine be considered as

Pseudo -distributed mode

Can Setting up 2 datanodes on same machine be considered as pseudo-distributed mode hadoop ? Thanks, Sindhu

Multiple datanodes on single machine !!

Hello, I have set up multiple datanodes on a single machine following the instructions in http://mail-archives.apache.org/mod_mbox/hadoop-common-user/201009.mbox/%3ca3ef3f6af24e204b812d1d24ccc8d71a03688...@mse16be2.mse16.exchange.ms%3E So i see 2 datanodes up and running when i run jps command.

Re: Ideal number of mappers and reducers to increase performance

configuration problem, but > misunderstood the map reduce logic. To solve your problem, can you paste your > cascalog query and let people take a look? > > Felix > > On Aug 3, 2014, at 1:51 PM, Sindhu Hosamane wrote: > >> >> I am not coding in mapreduce. I am runni

Re: Ideal number of mappers and reducers to increase performance

, 2014 at 12:00 AM, Harsh J wrote: > You can perhaps start with a generic 4+4 configuration (which matches > your cores), and tune your way upwards or downwards from there based > on your results. > > On Thu, Jul 31, 2014 at 8:35 PM, Sindhu Hosamane > wrote: > > Hello f

Ideal number of mappers and reducers to increase performance

Hello friends , If i am running my experiment on a server with 2 processors (4 cores each ) . To say it has 2 processors and 8 cores . What would be the ideal values for mapred.tasktracker.map.tasks.maximum and mapred.tasktracker.reduce.tasks.maximum to get maximum performance. I am running casc

Re: Performance on singlenode and multinode hadoop

Jul 31, 2014 at 6:28 PM, Sindhu Hosamane wrote: > Hello , > > If i am running my experiment on a server with 2 processors (4 cores each ) . > To say it has 2 processors and 8 cores . > What would be the ideal values for mapred.tasktracker.map.tasks.maximum and > mapred.tasktr

Re: Performance on singlenode and multinode hadoop

apacities in your > TT's mapred-site.xml via properties > mapred.tasktracker.map.tasks.maximum and > mapred.tasktracker.reduce.tasks.maximum. > > On Mon, Jul 28, 2014 at 4:30 PM, sindhu hosamane wrote: >> Hello , >> >> i set up 2 datanodes on a single machine(

Re: Performance on singlenode and multinode hadoop

TTs, just higher slot capacities in your > TT's mapred-site.xml via properties > mapred.tasktracker.map.tasks.maximum and > mapred.tasktracker.reduce.tasks.maximum. > > On Mon, Jul 28, 2014 at 4:30 PM, sindhu hosamane wrote: >> Hello , >> >> i set up 2 dat

Master /slave file configuration for multiple datanodes on same machine

Hello friends , I have set up multiple datanodes on same machine following the link http://mail-archives.apache.org/mod_mbox/hadoop-common-user/201009.mbox/ So now i have conf and conf2 both in my hadoop directory. How should master and slave files of conf and conf2 look like if i want conf to

Performance on singlenode and multinode hadoop

Hello , i set up 2 datanodes on a single machine(ubuntu machine) accordingly mentioned in the thread http://mail-archives.apache.org/mod_mbox/hadoop-common-user/201009.mbox/%3ca3ef3f6af24e204b812d1d24ccc8d71a03688...@mse16be2.mse16.exchange.ms%3E Ubuntu machine has 2 processors and 8 cores. Assu

Re: Help running hadoop example

May be u should give the complete path of jar file . That is absolute path . Best Regards, Sindhu > On 14.06.2014, at 01:22, Ryan de Vera wrote: > > Hello everyone, > > I just downloaded Hadoop verision 1.2.1 to my macbook and I am having trouble > running the example. I used this tutorial

RE: Multiple DataNodes on a single machine

Hello friends , i set up 2 datanodes on a single machine accordingly mentioned in the thread "RE: Multiple DataNodes on a single machine" . Ist works fine 2 datanodes are up and running . So i have 2 conf Folders conf and conf2 in hadoop-home . If i have to set dfs.replication value to 3 - in w

Re: Answering to particular message in mailing list

ing list ? > You can send email to user-subscr...@hadoop.apache.org . > > Once you're a subscriber, you can reply to other users' emails. > > > On Mon, May 26, 2014 at 1:19 PM, Sindhu Hosamane wrote: > This might be a dumb question but I really can't fig

Answering to particular message in mailing list

This might be a dumb question but I really can't figure out how to reply to ANY existing thread or post on the this hadoop mailing list . As far as I've understood I can post threads to u...@hadoo.apache.org . but how to reply to one particular post? There's no reply button, also reply-to or rep

How to make sure data blocks are shared between 2 datanodes

> > ok .thanks a lot that information . > As i said i am running 2 datanodes on same machine . so my haddop home has 2 > conf folders . > conf and conf2 and in turn 2 hdfs-site.xml in both conf folders . > I guess dfs.replication value in hdfs-site.xml of conf folder should be 3 . > What shou

Re: How to make sure data blocks are shared between 2 datanodes

ok .thanks a lot that information . As i said i am running 2 datanodes on same machine . so my haddop home has 2 conf folders . conf and conf2 and in turn 2 hdfs-site.xml in both conf folders . I guess dfs.replication value in hdfs-site.xml of conf folder should be 3 . What should i have it in

Re: How to make sure data blocks are shared between 2 datanodes

only have > two data nodes, you will most likely have two copies of the data in two > separate data nodes. > > > On Sun, May 25, 2014 at 12:40 PM, Sindhu Hosamane wrote: > >>> Hello Friends, >>> >>> I am running multiple datanodes on a sin

Re: How to make sure data blocks are shared between 2 datanodes

ns if you have a single replica then only a single data >> node will be used. The default replication is three and since you only have >> two data nodes, you will most likely have two copies of the data in two >> separate data nodes. >> >> >> On Sun, May 25, 2014

Re: How to make sure data blocks are shared between 2 datanodes

o data nodes, you will most likely have two copies of the data in two > separate data nodes. > > > On Sun, May 25, 2014 at 12:40 PM, Sindhu Hosamane wrote: > >>> Hello Friends, >>> >>> I am running multiple datanodes on a single machine .

How to make sure data blocks are shared between 2 datanodes

>> Hello Friends, >> >> I am running multiple datanodes on a single machine . >> >> The output of jps command shows >> Namenode Datanode Datanode Jobtracker tasktracker >> Secondary Namenode >> >> Which assures that 2 datanodes are up and running .I execute cascalog

How to make sure data blocks are shared between 2 datanodes

> Hello Friends, > > I am running multiple datanodes on a single machine . > > The output of jps command shows > Namenode Datanode Datanode Jobtracker tasktracker > Secondary Namenode > > Which assures that 2 datanodes are up and running .I execute cascalog queries