It isn't really designed for monitoring in the background in the sense that the current code base can output as curses-free text (-t), but it isn't CSV or any other easily parse-able format.

You can easily filter what it monitors using the -f option (tcpdump/pcap style).

On Fri, Jul 8, 2016 at 6:01 AM, Kaushal Shriyan <kaushalshriyan@gmail.com> wrote:

Hi,

Is there a way to monitor bandwidth usage using iftop? I am currently debugging a MySQL Master Slave Replication lag issue.

Master Server IP :- 192.168.1.10
Slave Server IP :- 192.168.1.11

I am interested in measuring the network traffic between Master and Slave at a particular period. For example the lag happens only during late night hours around 3:00 am till 4:00 am. Can iftop network monitoring utility be run in background or daemon mode or invoked by cron during a specific time period to see if the network is a bottleneck for the Slave Lag. Also can i filter source ip which is 192.168.1.10 (IP of the Master MySQL Server)?

Any help will be highly appreciable.

Regards,

Kaushal

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