Archivo de la etiqueta: fedora

Control Characters on vi Linux editor

Publicado el julio 25, 2016 por hvivani

Show hidden/control characters on vi: :set list   Hide hidden/control characters on vi: :set nolist   Replace hidden/control characters on vi: :%s/^M//g :%s/.$//g  

Publicado en Uncategorized | Etiquetado , | Deja un comentario

Indexing Common Crawl Metadata on Elasticsearch using Cascading

Publicado el mayo 28, 2015 por hvivani

If you want to explore how to parallelize the data ingestion into Elasticsearch, please have a look to this post I have written for Amazon AWS: http://blogs.aws.amazon.com/bigdata/post/TxC0CXZ3RPPK7O/Indexing-Common-Crawl-Metadata-on-Amazon-EMR-Using-Cascading-and-Elasticsearch It explains how to index Common Crawl metadata into Elasticsearch using Cascading connector … Seguir leyendo →

Publicado en Mis Publicaciones, Uncategorized | Etiquetado , , , , , | Deja un comentario

Back to the basics: Creating a SPEC file from a Maven project

Publicado el mayo 5, 2015 por hvivani

1) Build the package with the provided pom.xml: $ mvn package 2) Rebuild the RPM structure: $ mvn -DskipTests=true rpm:rpm A structure like the following will be created: /target/rpm/<app_name>/BUILD /target/rpm/<app_name>/RPMS /target/rpm/<app_name>/SOURCES /target/rpm/<app_name>/SPECS /target/rpm/<app_name>/SRPMS

Publicado en Uncategorized | Etiquetado , , , | Deja un comentario

Elasticsearch and Kibana on EMR Hadoop cluster

Publicado el enero 31, 2015 por hvivani

If you need to add Elasticsearch and Kibana on EMR, please have a look to this post I have written for Amazon AWS: http://blogs.aws.amazon.com/bigdata/post/Tx1E8WC98K4TB7T/Getting-Started-with-Elasticsearch-and-Kibana-on-Amazon-EMR It contains all the steps to launch a cluster and perform the basic testings on both … Seguir leyendo →

Publicado en Mis Publicaciones, Uncategorized | Etiquetado , , , , , | 3 comentarios

Create a really big file / Crear un archivo realmente grande

Publicado el diciembre 25, 2014 por hvivani

This is sometimes useful when playing with bigdata. Instead of a dd command and wait the file being created block by clock, we can run: $ fallocate -l 200G /mnt/reallyBigFile.csv It essentially «allocates» all of the space you’re seeking, but … Seguir leyendo →

Publicado en Uncategorized | Etiquetado , , | 2 comentarios

Instalando Maven en instancia Amazon EC2

Publicado el diciembre 16, 2014 por hvivani

Maven es una herramienta de software para la gestión y construcción de proyectos Java Obtenemos maven: $ wget http://apache.saix.net/maven/maven-3/3.2.3/binaries/apache-maven-3.2.3-bin.tar.gz Descomprimimos: $ tar -xzvf apache-maven-3.2.3-bin.tar.gz Movemos la carpeta a un directorio de instalación permanente: $ sudo mv /home/ec2-user/apache-maven-3.2.3 /usr/local/maven Creamos link … Seguir leyendo →

Publicado en Uncategorized | Etiquetado , , , | Deja un comentario

Hive: dealing with Out of Memory and Garbage Collector errors.

Publicado el diciembre 6, 2014 por hvivani

This is the common error: java.lang.OutOfMemoryError: GC overhead limit exceeded This error will occur in several Java environments, but, in particular, with Hive, is pretty common when big structures or several thousands objects are stored in memory. According to Sun, … Seguir leyendo →

Publicado en Uncategorized | Etiquetado , , , | Deja un comentario

Mandus Momberg’s Blog ! – the beauty of BASH

Publicado el diciembre 2, 2014 por hvivani

I would like to share with you a new awesome blog from an awesome professional: http://blog.mandusmomberg.com/ And… as a first post, a nice one, about the beauty of BASH: http://blog.mandusmomberg.com/blog/2014/12/01/o-what-a-beautiful-bashing/ Enjoy !

Publicado en Uncategorized | Etiquetado , | Deja un comentario

vi sudo save with root permissions / grabar cambios con permisos de root

Publicado el noviembre 28, 2014 por hvivani

Just: :w !sudo tee % % is current file. !sudo tee calls tee with administrator privileges and writes to current file.  But not vi buffered file. That’s why you will see a warning like this when using the command: W12: … Seguir leyendo →

Publicado en Uncategorized | Etiquetado , | Deja un comentario

MapReduce: Compression and Input Splits

Publicado el noviembre 23, 2014 por hvivani

This is something that always rise doubts: When considering compressed data that will be processed by MapReduce, it is important to check if the compression format supports splitting. If not, the number of map tasks may not be the expected. … Seguir leyendo →

Publicado en Uncategorized | Etiquetado , , , | Deja un comentario