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QUESTION 73
You are designing an SRDF/S over Fibre Channel solution. Data centers are 100 km apart and 4 Gb/s FC links are in place. What is the minimum number of buffer-to-buffer credits required to maximize the utilization of the links?
A. 25
B. 50
C. 100
D. 200
Answer: D
QUESTION 74
What is the benefit of the Link Capacity Adjustment Scheme in an SRDF deployment over a SONET circuit?
A. Enables dynamic scaling of bandwidth based on requirements.
B. Enables low capacity circuits to be grouped together into a higher capacity link.
C. Allows the replication throughput to scale linearly based on the TCP connections.
D. Allows multiple wavelengths of data to be transmitted over the same circuit.
Answer: A
QUESTION 75
Which benefit does SiRT provide for SRDF/S over Fibre Channel solutions?
A. Latency is equivalent to one round trip.
B. Jitter is significantly reduced.
C. Utilization of long distance links is improved.
D. Higher data compression ratio can be achieved.
Answer: A
QUESTION 76
What is the effect of block size on response times in an SRDF/S environment?
A. Larger block size applications experience higher response times.
B. Smaller block size applications experience higher response times.
C. Larger block size applications have the same response times as smaller block size applications.
D. Block size has no effect on response times.
Answer: A
QUESTION 77
A proposed SRDF/S solution was modeled with BCSD. The model assumed that the source array had two RFs. The RA Utilization chart shows the maximum utilization is at 80%. How many RFs should be recommended to ensure a successful implementation?
A. 2
B. 3
C. 4
D. 6
Answer: C
QUESTION 78
A proposed SRDF/S solution was modeled with BCSD. The model assumed that the source array had 4 GigE ports. The RA Utilization chart shows the maximum utilization is at 70%. How many GigE ports should be recommended to ensure a successful implementation?
A. 4
B. 5
C. 6
D. 8
Answer: C
QUESTION 79
What is the effect of block size on response times in an SRDF/S environment?
A. Smaller block size applications experience lower response times.
B. Larger block size applications experience lower response times.
C. Larger block size applications have the same response times as smaller block size applications.
D. Block size has no effect on response times.
Answer: A
QUESTION 80
A customer wants to implement SRDF/S for an application. The application is performing at 10,000 IOPS and is using many volumes. The size of the I/O is 4 KB. Forty percent (40%) of the IOPS are writes. Assume an RA can handle a maximum of 4,000 4 KB IOPS. Based on best practice, how many RAs should be recommended?
A. 1
B. 2
C. 4
D. 8
Answer: B
QUESTION 81
A customer wants to implement SRDF/S for an application. The application is performing at 12,000 IOPS and is using many volumes. The size of the I/O is 4 KB. Thirty percent (30%) of the IOPS are writes. Assume an RA can handle a maximum of 4,000 4 KB IOPS. Based on best practice, how many RAs should be recommended?
A. 1
B. 2
C. 4
D. 8
Answer: B
QUESTION 82
You are designing SRDF/S over GigE between two VMAX3 arrays. The production and remote data centers are 100 km apart. What is the expected write response time delay due to latency?
A. 0.25 ms
B. 0.5 ms
C. 1 ms
D. 2 ms
Answer: C
QUESTION 83
You are designing SRDF/S over Fibre Channel between two VMAX3 arrays. The production and remote data centers are 100 km apart. What is the expected write response time delay due to latency?
A. 0.25 ms
B. 0.5 ms
C. 1 ms
D. 2 ms
Answer: C
QUESTION 84
What does the BCSD Write Load Adjustment Factor account for when designing SRDF solutions?
A. I/O burstiness
B. Data compression
C. I/O Locality of reference
D. Write folding
Answer: A
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