Redundant VoD Streaming Service in a Private Cloud: Availability Modeling and Sensitivity Analysis

Table 2

Nomenclature of states.

State	Description
UUD	Service is up, N1 is up, and N2 is down
DDW	Service is down, N1 is down, and N2 is waiting
DUW	Service is down, N1 is up, and N2 is waiting
UDU	Service is up, N1 is down, and N2 is running
UUW	Service is up, N1 is up, and N2 is waiting
DDD	Service is down, N1 is down, and N2 is down
UWU	Service is up, N1 is waiting, and N2 is up
DWU	Service is down, N1 is waiting, and N2 is up
DDU	Service is down, N1 is down, and N2 is up
DWD	Service is down, N1 is waiting, and N2 is down
DUD	Service is down, N1 is up, and N2 is down