More Realistic Data

Hennessy and Patterson, Figure 7.20
- 58 DECstation 5000's
- 654 reboots over an 8974 hr. period (in hrs)
Assume even distribution over workstations and time (somewhat bogus) and a 60s MTTR

654 boots
58 machines
11.28 boots
machine
8974 hr
11.28 boots
MTTF = 33.2d
=
=
=
MTTF
MTTF+MTTR
99.998 % available
=

Notes:

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