Copying files from HDFS to HDFS

Let us understand how to copy files with in HDFS (from one HDFS location to another HDFS location).

We can use hdfs dfs -cp command to copy files with in HDFS.
One need to have at least read permission on source folders or files and write permission on target folder for cp command to work as expected..

hdfs dfs -cp /public/retail_db/* /user/`whoami`/retail_db

in the above command we are copying data from hdfs location /public/retail_db to the retail_db folder in user home dir in hadoop file system

hdfs dfs -ls /user/`whoami`/retail_db

Found 9 items
drwxr-xr-x   - itversity supergroup          0 2022-05-29 17:28 /user/itversity/retail_db/categories
-rw-r--r--   1 itversity supergroup   10303297 2022-05-29 17:28 /user/itversity/retail_db/create_db.sql
-rw-r--r--   1 itversity supergroup       1748 2022-05-29 17:28 /user/itversity/retail_db/create_db_tables_pg.sql
drwxr-xr-x   - itversity supergroup          0 2022-05-29 17:28 /user/itversity/retail_db/customers
drwxr-xr-x   - itversity supergroup          0 2022-05-29 17:28 /user/itversity/retail_db/departments
-rw-r--r--   1 itversity supergroup   10297372 2022-05-29 17:28 /user/itversity/retail_db/load_db_tables_pg.sql
drwxr-xr-x   - itversity supergroup          0 2022-05-29 17:28 /user/itversity/retail_db/order_items
drwxr-xr-x   - itversity supergroup          0 2022-05-29 17:28 /user/itversity/retail_db/orders
drwxr-xr-x   - itversity supergroup          0 2022-05-29 17:28 /user/itversity/retail_db/products