I have several machines all connected to one local machine that is running bitcoin in -server mode.
Other than adding up all of the individual machines is there a way for me to see the real-time (heck, even historical?) aggregated hash rate going through the bitcoin server?
What OS are these machines running on?
If it's *nix, one solution might be to install munin
-node on all the miners, then cobble together a quick munin plug-in that "stacked"
the hash rates together, like the (entropy) example here
If it's Windows, munin might still be an option
... but I've never tried it.
Edit: forgot to say: munin would give you semi-real-time data. The finest grained data is every five minutes, but it uses a round-robin database to store data up to 12 months. You end up with nice graphs for today, this week, this month and this year. And, as a bonus, you could even configure it to email you if one of the miners goes down.