Command line Session report with details

Hello

Actually I've a little problem. My backup is very slow.

I need to know which machines are slow.

I don't know the commande line.

For the moment I use this 

omnirpt -report single_session -session -html <sessionid> > file.html

But I need a table, with each machines. Like this machine1 time 1 hour data written 15 go.

If you can help it will be great.

Thank you