hadoop - Finding directories older than N days in HDFS

Question

Can hadoop fs -ls be used to find all directories older than N days (from the current date)?

I am trying to write a clean up routine to find and delete all directories on HDFS (matching a pattern) which were created N days prior to the current date.

Answer 1

This script lists all the directories that are older than [days] :

#!/bin/bash
usage="Usage: $0 [days]"

if [ ! "$1" ]
then
  echo $usage
  exit 1
fi

now=$(date +%s)
hadoop fs -lsr | grep "^d" | while read f; do 
  dir_date=`echo $f | awk '{print $6}'`
  difference=$(( ( $now - $(date -d "$dir_date" +%s) ) / (24 * 60 * 60 ) ))
  if [ $difference -gt $1 ]; then
    echo $f;
  fi
done