Hadoop HDFS: How to delete old files from HDFS?

0 votes

I want to delete older files from hdfs, say files that are older than 10 days. If I had to do this in linux, I would do something like this:

find /path/to/directory/ -type f -mtime +10 -name '*.txt' -execdir rm -- {} \;

So how to do this for hdfs?

Nov 15, 2018 in Big Data Hadoop by digger
• 27,640 points
1,288 views

1 answer to this question.

0 votes

You can use commands like this:

hdfs dfs -ls /file/Path    |   tr -s " "    |    cut -d' ' -f6-8    |     grep "^[0-9]"    |    awk 'BEGIN{ MIN=14400; LAST=60*MIN; "date +%s" | getline NOW } { cmd="date -d'\''"$1" "$2"'\'' +%s"; cmd | getline WHEN; DIFF=NOW-WHEN; if(DIFF > LAST){ print "Deleting: "$3; system("hdfs dfs -rm -r "$3) }}'

Or you can use shell script:

today=`date +'%s'`
hdfs dfs -ls /file/Path/ | grep "^d" | while read line ; do
dir_date=$(echo ${line} | awk '{print $6}')
difference=$(( ( ${today} - $(date -d ${dir_date} +%s) ) / ( 24*60*60 ) ))
filePath=$(echo ${line} | awk '{print $8}')

if [ ${difference} -gt 10 ]; then
    hdfs dfs -rm -r $filePath
fi
done
answered Nov 15, 2018 by Omkar
• 67,460 points

Related Questions In Big Data Hadoop

0 votes
1 answer

Hadoop: How to copy directory from local system to hdfs using Java code?

Just use the FileSystem's copyFromLocalFile method. If the source Path ...READ MORE

answered Nov 14, 2018 in Big Data Hadoop by Omkar
• 67,460 points
510 views
0 votes
1 answer

How to sync Hadoop configuration files to multiple nodes?

For syncing Hadoop configuration files, you have ...READ MORE

answered Jun 21, 2018 in Big Data Hadoop by HackTheCode
162 views
0 votes
1 answer

How to create a FileSystem object that can be used for reading from and writing to HDFS?

Read operation on HDFS In order to read ...READ MORE

answered Mar 21, 2018 in Big Data Hadoop by nitinrawat895
• 10,670 points

edited Mar 21, 2018 by nitinrawat895 289 views
0 votes
1 answer
0 votes
1 answer

Hadoop Mapreduce word count Program

Firstly you need to understand the concept ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 10,670 points
2,695 views
0 votes
1 answer

hadoop.mapred vs hadoop.mapreduce?

org.apache.hadoop.mapred is the Old API  org.apache.hadoop.mapreduce is the ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 10,670 points
284 views
0 votes
10 answers

hadoop fs -put command?

put syntax: put <localSrc> <dest> copy syntax: copyFr ...READ MORE

answered Dec 7, 2018 in Big Data Hadoop by Aditya
13,409 views
0 votes
1 answer

Hadoop dfs -ls command?

In your case there is no difference ...READ MORE

answered Mar 16, 2018 in Big Data Hadoop by kurt_cobain
• 9,240 points
983 views
0 votes
1 answer

How to delete a file from Hadoop hdfs using java?

Try this: FileSystem fs = FileSystem.get(getConf()); fs.delete(new ...READ MORE

answered Nov 28, 2018 in Big Data Hadoop by Omkar
• 67,460 points
450 views
0 votes
1 answer

How to delete hdfs folder from java app?

Try this: Configuration conf = new Configuration(); ...READ MORE

answered Oct 30, 2018 in Big Data Hadoop by Omkar
• 67,460 points
246 views