An SRDF/S implementation is being designed. The RA performance limits are 3800 4k IOPS for a Fibre RF adapter. The application is doing 6000 4k IOPS with 30% writes and uses multiple volumes. How many RAs are recommended?
A. 2
B. 1
C. 4
D. 6
What is the impact on response time when multiple concurrent writes to an RDF device arrive from different FA ports on a Symmetrix VMAX?
A. Concurrent SRDF/S writes will not help to improve response time.
B. Writes can run in parallel and response time is slightly improved.
C. Writes need to be finished before new writes arrive and negatively impacts response time.
D. Response time is mostly determined by the application write behavior.
When should customers implement SRDF/S solutions?
A. When they cannot afford to lose any data
B. When IO response time is very critical to applications.
C. When high bandwidth is required by an application.
D. When an array has and abundance of cache buffer.
Which factors contribute to response time elongation in an SRDF/S environment?
A. Write size, Distance and Network Equipment
B. IOPS, Write size and Distance
C. Write/s, Distance and Network Equipment
D. Read/s, Write/s and IO size
Using SRDF/S, In Enginuity 5772 and later, How many concurrent writes can a device receive?
A. 6
B. 16
C. 2
D. 8
In Enginuity 5671 and earlier, how does SDRF/S behave when multiple writes to a device are received?
A. Second write waits while first write is acknowledged.
B. Third write waits while second write is acknowledged.
C. 8 Concurrent writes are supported on a single device.
D. 4 Concurrent writes are supported on a single device.
A customer is using SRDF/S to replicate a Symmetrix VMAX at the production site to the VMAX at the DR site. The sites are connected using a dedicated T1 link and are 38 km apart. What will significantly improve the link service time between the 2 sites?
A. Upgrade to a faster link.
B. Decrease the number of RA ports.
C. Adding cache to both VMAX arrays.
D. Increase the priority of the high I/O applications on RA ports.
You are designing an SRDF/S solution. The workload profile is:
Total I/Os per second = 30000
Write % = 20
Read block size = 4 KB
Write block size = 4 KB
Network bandwidth can be purchased in increments of single OC3 (155 Mb/s) links. Data compression is not in use. How many OC3 links would you recommend?
A. 1
B. 2
C. 3
D. 4
A customer needs to configure SRDF/S between two sites 10 km apart. The customer connected the R1
ports to fabric-A at site 1 and the R2 ports to fabric-B at site 2. The customer does not want to merge the
two fabrics between sites.
What is the recommended solution?
A. Implement FC routing or Virtual SAN to isolate the fabric
B. Implement FCIP connection to isolate the fabric
C. Merge two fabrics, and zone R1 and R2 ports.
D. Connect the RDF ports using DWDM or SONET.
You are designing a Symmetrix VMAX SRDF/S over Fibre Channel solution. The production and remote data centers are 50 kilometers apart. What is the expected write response time delay due to latency?
A. 0.5 ms
B. 0.25 ms
C. 1 ms
D. 2 ms
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