Archivo de la categoría: Uncategorized

Adding a mount point to HDFS


Before proceeding: This procedure considers that you don’t have any current useful data on HDFS. All the data will be lost after adding mount points with this method. This procedure should be applied to every datanode in the cluster. No … Seguir leyendo

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

Muffins de Banana


Ingredientes: 100 g de harina 1 cucharada de polvo para hornear 100 g de banana madura 3 huevos 50 g de azúcar blanca 1 cucharada de vainilla 60 ml de leche Preparacion: Precalienta el horno a 170°C. Mezcla en un … Seguir leyendo

Publicado en Cooking, Uncategorized | Deja un comentario

AWS EMR – Big Data in Strata New York


Will you be in New York next week (Sept 25th – Sept 28th)?                    Come meet the AWS Big Data team at Strata Data Conference, where we’ll be happy to answer your questions, hear about your requirements, and help you … Seguir leyendo

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

s3:// vs s3n:// vs s3a:// vs EMRFS


s3:// Apache Hadoop implementation of a block-based filesystem backed by S3. Apache Hadoop has deprecated use of this filesystem as of May 2016. s3n:// A native filesystem for reading and writing regular files on S3. S3N allows Hadoop to access … Seguir leyendo

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

Kill’em All!


Use it at your own discretion: for app in `yarn application -list | awk ‘$6 == “ACCEPTED” { print $1 }’` ; do yarn application -kill “$app”;done            

Publicado en Uncategorized | Etiquetado , , | Deja un comentario

S3 and Parallel Processing – DirectFileOutputCommitter


The problem: While a Hadoop Job is writing output, it will write to a temporary directory: Task1 –> /unique/temp/directory/task1/file.tmp Task2 –> /unique/temp/directory/task2/file.tmp When the tasks finish the execution, will move (commit) the temporary file to a final location. This schema … Seguir leyendo

Publicado en Uncategorized | Etiquetado , , | Deja un comentario

God does not cast dice / Dios no juega a los dados


Niels Bohr (left) and Albert Einstein (right) discussing quantum mechanics.

Publicado en Uncategorized | Etiquetado | Deja un comentario