Organizations are sometimes faced with the need to locate cluster members in different
geographic locations that are distant from each other. A typical example is replicated data centers
whose location is widely separated for disaster recovery purposes. What are the restrictions of
this solution?
A.
There are two restrictions: 1. The synchronization network must guarantee no more than
100ms latency and no more than 5% packet loss. 2. The synchronization network may only
include switches and hubs.
B.
There is one restriction: The synchronization network must guarantee no more than 150 ms
latency (ITU Standard G.114).
C.
There is one restriction: The synchronization network must guarantee no more than 100 ms
latency.
D.
There are no restrictions.
C from the ClusterXL admin guide
Do your homework bruh, it’s 100ms/5% packet loss and the sync ports must be on the same subnet (hence the switch hub thing)
A from the ClusterXL admin guid.
Tim is misleading.
Indeed, from ClusterXL admin guide:
1. The synchronization network must guarantee no more than 100ms latency and no more than 5% packet
loss.
2. The synchronization network may only include switches and hubs. No routers are allowed on the
synchronization network, because routers drop Cluster Control Protocol packets.
I have persoanlly seen this, Answer is A.
A Confirmed
A. There are two restrictions: 1. The synchronization network must guarantee no more than 100ms latency and no more than 5% packet loss. 2. The synchronization network may only include switches and hubs.
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