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How to monitor any text file import

So as I was sitting here just now waiting for an 80+ MB import to process over an SSH connection, I began wondering to myself if there was some way to monitor the progress of an import. Percentage—or even throughput—of the file being sent over the pipe.

Turns out that there is a way!

Enter the command pv.

pv allows a user to see the progress of data through a pipeline, by giving information such as time elapsed, percentage completed (with progress bar), current throughput rate, total data transferred, and ETA.

Uh. Yes, please.

If you're running GNU/Linux, you probably already have this installed. On a Mac it's available via Homebrew.

brew install pv

Once installed, you use it to send your text files to commands that are expecting things through stdin like so:

$ pv some-db.sql | mysql -uroot 8f00b204e9800998ecf8427e
83.2MiB 0:00:25 [3.28MiB/s] [==================================================================>] 100%

Never worry about where your imports are again!