Which two items define why the CLUSTRON (Cluster Control) relies on serial links for inter-head
communications?
A.
Serial links provide greater reliability and are sufficient for a heartbeat.
B.
Both InfiniBand and serial links are used for performance and reliability.
C.
Serial links take interrupts at high priority.
D.
InfiniBand links are used, and not serial links.
Explanation:
All inter-head communication consists of one or more messages transmitted over
one of the
three cluster I/O links provided by the CLUSTRONhardware.Thisdevice offers two low-speed
serial links and one Ethernet link.The use of serial links allows forgreater reliability; Ethernet links
may not be serviced quickly enough by a system under
extremely heavy load.
The serial links used by the Sun ZFS Storage 7000 series appliances are
not susceptible to this failure mode. The Ethernet link provides a higher-performance transport
for non-heartbeat messages such as rejoin synchronization and provides a backup heartbeat.