FY01K System Availability Statistics

Availability percentages are calculated using gross wall clock time. Outages/periods of unavailability (downtime) are subtracted from the total wall clock hours (accrued from beginning of FY99 or instantiation of the system) and presented as the percentage of the time the system was available to the users. The downtimes are scheduled and unscheduled periods of non-availability grouped into the following three categories: Hardware (H/W), Software (S/W), and Other (Oth). The Oth category includes unavailable time caused by power outages, environmental conditions and planned power-downs for equipment relocations or computer room modifications, etc.

To view a summary of number of downtimes and cumulative hours, go to the Overall Systems Availability Details.

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FY01 Mainframe Monthly Availability Percentages
	Oct	Nov	Dec	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep
J90/SV1s
Killeen	77.85	96.56	98.58	96.42	99.92	99.74	99.65	99.34	98.57	99.74	99.49	97.16
Bhaskara	77.70	95.91	98.76	98.89	99.03	99.54	99.19	99. 44	98.94	100	99.47	99.12
Franklin	77.35	96.79	98.76	DECOM	DECOM	DECOM	DECOM	DECOM	DECOM	DECOM	DECOM	DECOM
Seymour	77.29	96.72	98.78	98.80	98.84	99.62	99.63	99.38	98.27	99.74	99.34	98.15
T3E
Mcurie	74.66	95.46	99.17	98.28	99.43	98.61	99.33	99.29	98.71	99.20	98.59	97.88
IBM SP
GSeaborg	100	99.92	100	100	100	92.98	92.36	98.47	100	99.60	100	DECOM
Seaborg	NIS	NIS	NIS	NIS	NIS	NIS	NIS	NIS	NIS	100	90.80	94.55

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FY01 Auxiliary System Monthly Availability Percentages
	Oct	Nov	Dec	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep
File System
AFS	100	100	100	100	100	100	100	100	100	100	99.62	100
File Storage Systems
HPSS	82.85	97.56	99.50	99.44	99.16	99.24	98.59	97.97	98.04	99.01	98.64	99.05
Archive	83.14	98.84	98.02	98.74	99.42	98.94	99.28	97.15	98.88	99.57	99.38	99.17
Math/Visualization Systems
Newton	76.47	99.48	99.95	99.59	99.88	99.34	99.93	99.90	99.67	100	100	97.55
Escher	99.46	97.49	99.42	97.62	99.93	100	100	98.63	98.93	99.75	99.53	98.88

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*Mean Time Between Interruptions - Total wall clock hours/total number of downtime periods
**Mean Time To Restoral - Total downtime hours/total number of downtime periods

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