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Re: Rack Aware Hadoop cluster
That's one I use too I think it's on apache web site

Sent from my iPhone

On May 8, 2013, at 1:49 PM, Chris Embree <[EMAIL PROTECTED]> wrote:

> Here is a sample I stole from the web and modified slightly... I think.  
>
> HADOOP_CONF=/etc/hadoop/conf
>
> while [ $# -gt 0 ] ; do
>   nodeArg=$1
>   exec< ${HADOOP_CONF}/rack_info.txt
>   result=""
>   while read line ; do
>     ar=( $line )
>     if [ "${ar[0]}" = "$nodeArg" ] ; then
>       result="${ar[1]}"
>     fi
>   done
>   shift
>   if [ -z "$result" ] ; then
>     echo -n "/default/rack "
>   else
>     echo -n "$result "
>   fi
>
> done
>
>
> The rack_info.txt file contains all hostname AND IP addresses for each node:
> 10.10.10.10  /dc1/rack1
> 10.10.10.11  /dc1/rack2
> datanode1  /dc1/rack1
> datanode2  /dc1/rack2
> .. etch.
>
>
> On Wed, May 8, 2013 at 1:38 PM, Adam Faris <[EMAIL PROTECTED]> wrote:
>> Look between the <code> blocks starting at line 1336.  http://lnkd.in/rJsqpV   Some day it will get included in the documentation with a future Hadoop release. :)
>>
>> -- Adam
>>
>> On May 8, 2013, at 10:29 AM, Mohammad Mustaqeem <[EMAIL PROTECTED]>
>>  wrote:
>>
>> > If anybody have sample (topology.script.file.name) script then please share it.
>> >
>> >
>> > On Wed, May 8, 2013 at 10:30 PM, Mohammad Mustaqeem <[EMAIL PROTECTED]> wrote:
>> > @chris, I have test it outside. It is working fine.
>> >
>> >
>> > On Wed, May 8, 2013 at 7:48 PM, Leonid Fedotov <[EMAIL PROTECTED]> wrote:
>> > Error in script.
>> >
>> >
>> > On Wed, May 8, 2013 at 7:11 AM, Chris Embree <[EMAIL PROTECTED]> wrote:
>> > Your script has an error in it.  Please test your script using both IP Addresses and Names, outside of hadoop.
>> >
>> >
>> > On Wed, May 8, 2013 at 10:01 AM, Mohammad Mustaqeem <[EMAIL PROTECTED]> wrote:
>> > I have done this and found following error in log -
>> >
>> >
>> > 2013-05-08 18:53:45,221 WARN org.apache.hadoop.net.ScriptBasedMapping: Exception running /home/mustaqeem/development/hadoop-2.0.3-alpha/etc/hadoop/rack.sh 127.0.0.1
>> > org.apache.hadoop.util.Shell$ExitCodeException: /home/mustaqeem/development/hadoop-2.0.3-alpha/etc/hadoop/rack.sh: 8: /home/mustaqeem/development/hadoop-2.0.3-alpha/etc/hadoop/rack.sh: Syntax error: "(" unexpected (expecting "done")
>> >
>> >       at org.apache.hadoop.util.Shell.runCommand(Shell.java:202)
>> >       at org.apache.hadoop.util.Shell.run(Shell.java:129)
>> >       at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:322)
>> >       at org.apache.hadoop.net.ScriptBasedMapping$RawScriptBasedMapping.runResolveCommand(ScriptBasedMapping.java:241)
>> >       at org.apache.hadoop.net.ScriptBasedMapping$RawScriptBasedMapping.resolve(ScriptBasedMapping.java:179)
>> >       at org.apache.hadoop.net.CachedDNSToSwitchMapping.resolve(CachedDNSToSwitchMapping.java:119)
>> >       at org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager.resolveNetworkLocation(DatanodeManager.java:454)
>> >       at org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager.registerDatanode(DatanodeManager.java:713)
>> >       at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.registerDatanode(FSNamesystem.java:3459)
>> >       at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.registerDatanode(NameNodeRpcServer.java:881)
>> >       at org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolServerSideTranslatorPB.registerDatanode(DatanodeProtocolServerSideTranslatorPB.java:90)
>> >       at org.apache.hadoop.hdfs.protocol.proto.DatanodeProtocolProtos$DatanodeProtocolService$2.callBlockingMethod(DatanodeProtocolProtos.java:18295)
>> >       at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:454)
>> >       at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1014)
>> >       at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1735)
>> >       at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1731)
>> >       at java.security.AccessController.doPrivileged(Native Method)