Sorting using Hadoop - TotalOrderPartitioner

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Sorting using Hadoop – TotalOrderPartitioner

http://pipiper.wordpress.com/2013/05/02/sorting-using-hadoop-totalorderpartitioner/

job.setPartitionerClass(TotalOrderPartitioner.class);

job.setSortComparatorClass(SortKeyComparator.class);

job.setPartitionerClass(TotalOrderPartitioner.class);



Path inputDir = new Path(partitionLocation);

Path partitionFile = new Path(inputDir, "partitioning");

TotalOrderPartitioner.setPartitionFile(job.getConfiguration(), partitionFile);



int numSamples = numReduceTasks;

int maxSplits = numReduceTasks - 1;



InputSampler.Sampler sampler = new InputSampler.RandomSampler(pcnt, numSamples, maxSplits);

InputSampler.writePartitionFile(job, sampler);



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[LUCENE-4956] the korean analyzer that has a korean morphological analyzer and dictionaries - ASF JIRA

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Solr Korean Tokenizer

https://issues.apache.org/jira/browse/LUCENE-4956



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Quotes, Escape Characters, Delimiters | SS64.com

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Windows Batch Syntax : Escape Characters, Delimiters and Quotes

http://ss64.com/nt/syntax-esc.html



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kuromoji - japanese morphological analyzer

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Japanese Tokenizer: Multi-Language Analysis in Solr

http://www.atilika.org/

http://mentaldetritus.blogspot.com/2013/03/custom-japanese-tokenization-in-solr-40.html

Solr 4.0 (really, it's been there since 3.6) has a new analysis module for handling Japanese, called Kuromoji.



java -cp kuromoji-0.7.7.jar org.atilika.kuromoji.TokenizerRunner

<fieldType name="text_ja" class="solr.TextField" positionIncrementGap="100" autoGeneratePhraseQueries="false">



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SSH Keys - ArchWiki

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SSH and SSH Agent

https://wiki.archlinux.org/index.php/SSH_Keys#SSH_agents



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Secure Shell: How Does SSH Work http://www.slashroot.in/secure-shell-h

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Secure Shell: How Does SSH Work

http://www.slashroot.in/secure-shell-how-does-ssh-work



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Hadoop I/O: Sequence, Map, Set, Array, BloomMap Files

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Hadoop I/O: Sequence, Map, Set, Array, BloomMap Files

http://blog.cloudera.com/blog/2011/01/hadoop-io-sequence-map-set-array-bloommap-files/



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SolrCloud and Shard Splitting

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Shard Splitting and Document Routing in SolrCloud

http://www.slideshare.net/shalinmangar/solr-cloud-shardsplitting

http://www.slideshare.net/thelabdude/tjp-solr-webinar#

Document Routing: Custom Hashing

http://searchhub.org/2013/06/13/solr-cloud-document-routing/ numShards=4 router=compositeId

id = BigCo!doc5

q=my_query&shard.keys=BigCo!

Co-locate documents



SolrCloud Collections API

/admin/collections?action=CREATE|DELETE|RELOAD|CREATE&name=mycollection



Each shard is assigned a hash range

Each shard also has a state which defaults to 'ACTIVE'

Seamless on-the-fly splitting – no downtime required

● Retried on failures

● /admin/collections?

action=SPLITSHARD&collection=mycollection

– &shard=shardId

● A lower-level CoreAdmin API comes free!

– /admin/cores?action=SPLIT&core=core0&targetCore=core1&targetCore=core2

– /admin/cores?action=SPLIT&core=core0&path=/path/to/index/1&path=/path/to/index/2





https://issues.apache.org/jira/browse/SOLR-4816

1) Document routing: Updates are routed directly to the correct shard leader eliminating document routing at the server.

2) Optional parallel update execution: Updates for each shard are executed in a separate thread so parallel indexing can occur across the cluster.



https://issues.apache.org/jira/browse/SOLR-3076

Solr(Cloud) should support block joins





https://issues.apache.org/jira/browse/SOLR-5025

Implement true re-sharding for SolrCloud ==Unresolved



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I really need to know the reason.

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I really need to know the reason.

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To import Solr Project to Eclipse, just run ant eclipse.

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To import Solr Project to Eclipse, just run ant eclipse.



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CJK with Solr for Libraries, part 1 - part 5

Script Translations
Han Traditional <--> Simplified
<filter class="solr.ICUTransformFilterFactory" id="Traditional-Simplified"/>
Katakana <--> Hiragana
<filter class="solr.ICUTransformFilterFactory" id="Katakana-Hiragana"/> 
http://discovery-grindstone.blogspot.com/2013/10/cjk-with-solr-for-libraries-part-1.html
http://discovery-grindstone.blogspot.com/2013/11/cjk-with-solr-for-libraries-part-2.html
http://discovery-grindstone.blogspot.com/2013/11/cjk-with-solr-for-libraries-part-3.html
http://discovery-grindstone.blogspot.com/2014/01/cjk-with-solr-for-libraries-part-4.html
http://discovery-grindstone.blogspot.com/2014/01/cjk-with-solr-for-libraries-part-5.html
http://discovery-grindstone.blogspot.com/2014/01/cjk-with-solr-for-libraries-part-6.html

http://www.hathitrust.org/blogs/large-scale-search/multilingual-issues-part-1-word-segmentation
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Reading the output of a command into a batch file variable

http://blogs.msdn.com/b/oldnewthing/archive/2012/07/31/10334556.aspx

for /F "delims=" %%i in ('dir /B /S "%JAVA_HOME%" /a-d ^| findstr jvm.dll') do set "NEW_PR_JVM=%%i"

The /F flag to the FOR command says that it should open the file you pass in parentheses and set the loop variable to the contents of each line.
for /f %%i in (words.txt) do echo [%%i]
The loop variable in the FOR command takes one percent sign if you are executing it directly from the command prompt, but two percent signs if you are executing it from a batch file. 
By default, the FOR command sets the loop variable to the first word of each line. If you want to capture the entire line, you need to change the delimiter.

for /f "delims=" %%i in (names.txt) do echo [%%i]

You can put the file name in single quotes to say "Instead of opening this file and reading the contents, I want you to run this command and read the contents."
for /f "delims=" %%i in ('printappdir') do cd "%%i"

for /f %%i in ('printappdir') do set RESULT=%%i
echo The directory is %RESULT%

for /f "tokens=1-2,14" %%i in ('ipconfig') do ^
    if "%%i %%j"=="IPv4 Address." set IPADDR=%%k
The above command asked to execute the ipconfig command and extract the first, second, and fourteenth words into loop variable starting with %i. In other words, %i gets the first word, %j gets the second word, and %k gets the fourteenth word.

for /f "tokens=14" %%i in ('ipconfig ^| findstr /C:"IPv4 Address"') do ^
  set IPADDR=%%i

In PowerShell
foreach ($i in Get-WmiObject Win32_NetworkAdapterConfiguration) {
  if ($i.IPaddress) { $i.IPaddress[0] }
}
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Sleep for x Seconds in Windows Batch or PowerShell

Timeout
http://technet.microsoft.com/en-us/library/cc754891.aspx
timeout /t <TimeoutInSeconds> [/nobreak] 
timeout /t 10
timeout /t 100 /nobreak
To pause the command processor indefinitely until a key is pressed, type:
timeout /t -1

for older windows, using
ping 127.0.0.1 -n 5 -w 1000 > nul

In PowerShell
Start-Sleep -s 5
powershell -command "Start-Sleep -s 5"
Start-Sleep -m 10000
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CS188Spring2013: - Introduction to Artificial Intelligence http://www.

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CS188Spring2013: - Introduction to Artificial Intelligence

http://www.youtube.com/user/CS188Spring2013



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The Specified Service Has Been Marked For Deletion - DevOps On Windows

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How to fix "The specified service has been marked for deletion"

Typically this error message happens because something else has locked the installed service database: Common culprits: mmc.exe, services.msc, Process Explorer (Sysinternals)

http://www.devopsonwindows.com/the-specified-service-has-been-marked-for-deletion/

http://growlycode.blogspot.com/2011/05/how-to-fix-specified-service-has-been.html

http://blog.cyotec.com/2011/05/specified-service-has-been-marked-for.html



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Using Apache Procrun to Rename Process Name of a Java Program in Windows

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Using Apache Procrun to Rename Process Name of a Java Program in Windows

Using Apache Procrun to Rename Process Name of a Java Program in Windows

http://lifelongprogrammer.blogspot.com/2014/01/using-apache-procrun-to-rename-java-process-name.html

Describe the approach to rename process name of a java application by using Apache Procrun to wrap it as a service, and rename prunsrv.exe to an meaningful name such as MyApp.exe.



set PRUNSRV=%~dp0%MyApp.exe

"%PRUNSRV%" //IS//%SERVICE_JAVA% --Install="%PRUNSRV%"

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Using Apache Procrun to Rename Process Name of a Java Program in Windows

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Using Apache Procrun to Rename Process Name of a Java Program in Windows

Using Apache Procrun to Rename Process Name of a Java Program in Windows

http://lifelongprogrammer.blogspot.com/2014/01/using-apache-procrun-to-rename-java-process-name.html

Describe the approach to rename process name of a java application by using Apache Procrun to wrap it as a service, and rename prunsrv.exe to an meaningful name such as MyApp.exe.



set PRUNSRV=%~dp0%MyApp.exe

"%PRUNSRV%" //IS//%SERVICE_JAVA% --Install="%PRUNSRV%"

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Using Apache Procrun to Rename Process Name of a Java Program in Windows

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Using Apache Procrun to Rename Process Name of a Java Program in Windows

Using Apache Procrun to Rename Process Name of a Java Program in Windows

http://lifelongprogrammer.blogspot.com/2014/01/using-apache-procrun-to-rename-java-process-name.html

Describe the approach to rename process name of a java application by using Apache Procrun to wrap it as a service, and rename prunsrv.exe to an meaningful name such as MyApp.exe.



set PRUNSRV=%~dp0%MyApp.exe

"%PRUNSRV%" //IS//%SERVICE_JAVA% --Install="%PRUNSRV%"

Jeffery yuan (https://plus.google.com/101157854606139706613/posts/3mT6yT17CSX) via Jeffery yuan (https://plus.google.com/101157854606139706613/posts/3oxDhZydVNQ)



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Using Apache Procrun to Rename Process Name of a Java Program in Windows

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Using Apache Procrun to Rename Process Name of a Java Program in Windows

Using Apache Procrun to Rename Process Name of a Java Program in Windows

http://lifelongprogrammer.blogspot.com/2014/01/using-apache-procrun-to-rename-java-process-name.html

Describe the approach to rename process name of a java application by using Apache Procrun to wrap it as a service, and rename prunsrv.exe to an meaningful name such as MyApp.exe.



set PRUNSRV=%~dp0%MyApp.exe

"%PRUNSRV%" //IS//%SERVICE_JAVA% --Install="%PRUNSRV%"

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Using Apache Procrun to Rename Process Name of a Java Program in Windows

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Using Apache Procrun to Rename Process Name of a Java Program in Windows

Using Apache Procrun to Rename Process Name of a Java Program in Windows

http://lifelongprogrammer.blogspot.com/2014/01/using-apache-procrun-to-rename-java-process-name.html

Describe the approach to rename process name of a java application by using Apache Procrun to wrap it as a service, and rename prunsrv.exe to an meaningful name such as MyApp.exe.



set PRUNSRV=%~dp0%MyApp.exe

"%PRUNSRV%" //IS//%SERVICE_JAVA% --Install="%PRUNSRV%"

Jeffery yuan (https://plus.google.com/101157854606139706613/posts/8ZTJYSPWJeG) via Jeffery yuan (https://plus.google.com/101157854606139706613/posts/3oxDhZydVNQ)



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Using Apache Procrun to Rename Process Name of a Java Program in Windows

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Using Apache Procrun to Rename Process Name of a Java Program in Windows

Using Apache Procrun to Rename Process Name of a Java Program in Windows

http://lifelongprogrammer.blogspot.com/2014/01/using-apache-procrun-to-rename-java-process-name.html

Describe the approach to rename process name of a java application by using Apache Procrun to wrap it as a service, and rename prunsrv.exe to an meaningful name such as MyApp.exe.



set PRUNSRV=%~dp0%MyApp.exe

"%PRUNSRV%" //IS//%SERVICE_JAVA% --Install="%PRUNSRV%"

Jeffery yuan (https://plus.google.com/101157854606139706613/posts/caGvJgJ4cJc) via Jeffery yuan (https://plus.google.com/101157854606139706613/posts/3oxDhZydVNQ)



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Using Apache Procrun to Rename Process Name of a Java Program in Windows

Please Visit: http://lifelongprogrammer.blogspot.com



Using Apache Procrun to Rename Process Name of a Java Program in Windows

http://lifelongprogrammer.blogspot.com/2014/01/using-apache-procrun-to-rename-java-process-name.html

Describe the approach to rename process name of a java application by using Apache Procrun to wrap it as a service, and rename prunsrv.exe to an meaningful name such as MyApp.exe.



set PRUNSRV=%~dp0%MyApp.exe

"%PRUNSRV%" //IS//%SERVICE_JAVA% --Install="%PRUNSRV%"



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Poor man's "entity" extraction with Solr

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Poor man’s “entity” extraction with Solr

http://searchhub.org/2013/06/27/poor-mans-entity-extraction-with-solr/?utm_source=rss&utm_medium=rss&utm_campaign=poor-mans-entity-extraction-with-solr



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Managing Services the PowerShell way – Part 3: Start and stop Services

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Managing Services the PowerShell way – Part 3: Start and stop Services

http://4sysops.com/archives/managing-services-the-powershell-way-part-3/ get-service bits

stop-service bits -PassThru

get-service bits | where {$_.status -eq 'running'} | stop-service -pass

start-service wuauserv -PassThru

restart-service spooler -PassThru



get-service bits | select *

suspend-service o2flash -PassThru

resume-service o2flash -PassThru



Remote Services

Invoke-Command {restart-service dns –passthru} –comp chi-dc03,chi-dc02,chi-dc01



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Several ways to call a windows batch file from another one or from prompt. Which one in which case?

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Several ways to call a windows batch file from another one

http://stackoverflow.com/questions/2607856/several-ways-to-call-a-windows-batch-file-from-another-one-or-from-prompt-which

direct call: called.bat

the batch file will be executed by the current cmd.exe instance (or a new cmd.exe instance if, for instance, double-clicked in Explorer).



using call command: call called.bat

same as #1, only has an effect when used inside a batch/cmd file. In a batch file, without 'call', the parent batch file ends and control passes to the called batch file; with 'call' runs the child batch file, after the child batch finishes, the parent batch file continues with statements following call.



using cmd command: cmd /c called.bat

runs the batch file in a new cmd.exe instance.



using start command: start called.bat

start will run the batch file in a new cmd.exe instance in a new window, and the caller will not wait for completion.



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Windows PowerShell Commands: Remove-Item Delete al file that is both h

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Windows PowerShell Commands: Remove-Item

Delete al file that is both hidden and read-only:

Remove-Item -Recurse -Force .\incubator-blur

Remove-Item c:\scripts\* -exclude *.wav

Remove-Item c:\scripts\* -include .txt -exclude *test

Delete only a folder called ss64:

PS C:\> remove-item ss64 | Where { $_.PSIsContainer }

Delete only a file called ss64:

PS C:\> remove-item ss64 | Where { ! $_.PSIsContainer }



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Apache Blur (Incubating) Home

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Windows' equivalent of the "which“ command in Unix: where and Get-Command

http://superuser.com/questions/207707/what-is-windows-equivalent-of-the-which-command-in-unix-is-there-an-equivale Get-Command will find all commands including executables:
PS\> Get-Command ipconfig
If you want to limit the commands to just executables:
PS\> Get-Command -CommandType Application

WHERE (Windows 2003 + )
http://ss64.com/nt/where.html
Locate and display files in a directory tree. 
The WHERE command is roughly equivalent to the UNIX 'which' command. By default, the search is done in the current directory and in the PATH.

WHERE /r c:\ Zappa
WHERE /r \\Server1\Share1 /e Zappa.*
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Select-String

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Learning PwoerShell COmmands: Select-String and Measure-Object

Select-String

http://technet.microsoft.com/en-us/library/hh849903.aspx select-string -path $pshome\en-US\*.txt -pattern "@"

$f = select-string -path audit.log -pattern "logon failed" -context 2, 3

$f.count

(select-string -path audit.log -pattern "logon failed").count

Select-String C:\Scripts\Test.lxt -pattern "failure" -context 2

Select-String C:\Scripts\Test.lxt -pattern "failure" -context 3,1



Measure-Object

http://technet.microsoft.com/en-us/library/hh849965.aspx

Display the number of characters, words, and lines in the Text.txt file.

get-content C:\test.txt | measure-object -character -line -word

get-childitem | measure-object -property length -minimum -maximum -average

import-csv d:\test\serviceyrs.csv | measure-object -property years -minimum -maximum -average



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Base 2 arithmetic and boolean tricks

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Base 2 arithmetic and boolean tricks

http://www.ugcs.caltech.edu/~wnoise/base2.html

x & (x-1)

= x with the lowest set bit cleared.

x & ~(x-1)

= extracts the lowest set bit of x (all others are clear)

x | (x+1)

= x with the lowest cleared bit set.

x | ~(x+1)

= extracts the lowest cleared bit of x (all others are set).



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Power set - Wikipedia, the free encyclopedia

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Power set

http://en.wikipedia.org/wiki/Power_set

In mathematics, the power set (or powerset) of any set S, written \mathcal{P}(S), P(S), ℙ(S), ℘(S) or 2S, is the set of all subsets of S, including the empty set and S itself.



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EpiCode

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Source code of Elements of Programming Interviews

https://github.com/adnanaziz/EpiCode/tree/master/src/com/epi

https://code.google.com/p/elements-of-programming-interviews/

http://www.amazon.com/Elements-Programming-Interviews-Questions-Solutions/dp/1479274836



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