Node Usage in FY2015

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 for fiscal year-end from Apr 1 at midnight to Apr 3, 2015, at 16:00
- System maintenance along with power outage of maintenance of electric power facility from Oct 8, 2015 to Oct 15, 2015

The chart is updated in October and April.