These graphs show the average number of free nodes over various time periods. Nodes are broken down into two classes: The first class are the pc3000s, which are the most numerous, and are fairly modern. They are most experimenters' nodes of choice. For many experimenters, the number of free pc3000s limits the size of the experiments they can run. The second class includes other, older PCs (along with the pc3000s) to give a sense for how many nodes are available if one is willing to use some slower nodes.

Emulab currently includes around 350 PC nodes. As you can see, most of those are in use even during our periods of "light" usage.

Hourly graphs show the average number of free nodes in the given hour. Daily graphs show the average number of free nodes in the given day, etc. All times are given in Mountain Time. Note that because some data in these graphs is averaged over a very long time period (up to four years), it may not reflect recent trends.

Recent Availability

Last 2 Weeks (hourly)

Last 2 Months (daily)

Diurnal

A Typical Week (hourly, average since Sep 2005)

Long-Term Trends

Since Sep 2005 (yearly)

Since Sep 2005 (monthly)

Since Sep 2005 (weekly)

Note: The gap in the last two graphs represents periods when no data was availabe due to bugs in our system.