Node Usage in FY2013

This graph shows usage of 82,944 nodes of the K computer by day.

• Halt – The average number of halted nodes due to system maintenance for the day
• Idle – The average number of nodes on stand-by for the day
• Busy (daily mean) – The average number of used nodes for the day
• Busy (daily maximum) – The maximum number of used nodes for the day

- System maintenance from Jul 29, 2013, at 9am to Aug 5, 2013, at noon
- System maintenance for year-end from Dec 28, 2013, at 9am to Jan 2, 2014, at 9am