An organization wants to design a remote, synchronous replication solution for disaster recovery in their private cloud. They must meet near zero RPO and avoid increased response time.
What are the factors impacting response time in this solution that should be considered?
A . Buffer size at source site
Network bandwidth
Number of replication channels
B . Buffer size at source site
Number of writes to source
Distance between sites
C . Number of writes to source
Locality of reference
Type of the network
D . Distance between sites
Number of replication channels
Network bandwidth
Answer: D
Explanation:
Page 311 Manual.
The increase in response time is a result of some factors such as network bandwidth, latency, distance between the sites, the number of writes, write block size, network equipment overhead, number of replication channels, and type of the network. Insufficient bandwidth causes an increase in response time.
With synchronous replication, one should have sufficient bandwidth all the time. To minimize the response time elongation, it is Important to ensure that the maximum bandwidth is always provided by the network.
• Consider implementing a compression and deduplication solution that reduces the network bandwidth requirements.
• The number of replication channels depends on how much data needs to be replicated. If the number of replication channels is not properly configured, the performance could be impacted.