Comments on: How to Monitor Progress of (Copy/Backup/Compress) Data using ‘pv’ Command

By: red

red — Sun, 05 Apr 2020 23:58:08 +0000

Can you explain pv with cp command? I can't seem to get it working.

By: xrkr

xrkr — Sat, 08 Sep 2018 06:03:25 +0000

Hello Aaron/Kk,

Was there any conclusion? We observed a similar lag while using pv command to transfer the files over the p2p network. The pv command didn’t return to the command prompt quickly while over the LAN it was quick.

By: Aaron Kili

Aaron Kili — Mon, 11 Jun 2018 15:28:48 +0000

In reply to kk.

@kk

This is quite interesting! We have to investigate this further, to come up with a solid conclusion. Many thanks for sharing this concern.

By: kk

kk — Sun, 10 Jun 2018 02:24:15 +0000

Is there any reason why pv might slow things down? See example below:

time pigz -dk MYSQL_BACKUP_2018-06-08-17\:26\:15.sql.gz | mysql -pmetatest
Warning: Using a password on the command line interface can be insecure.

real 0m29.868s
user 0m5.108s
sys 0m2.020s

time pv MYSQL_BACKUP_2018-06-08-17\:26\:15.sql.gz | pigz -d | mysql -pmetatest
Warning: Using a password on the command line interface can be insecure.
215MiB 0:01:16 [2.81MiB/s] [========================================================================>] 100%

real 1m16.837s
user 0m13.868s
sys 0m2.392s

By: Aaron Kili

Aaron Kili — Mon, 06 Nov 2017 05:53:01 +0000

In reply to Ronald Trumpet.

@Ronald

Oops, nice catch, we will correct it as soon as possible.