SG0-001 · Question #316
A company has been expanding its SAN physically throughout its campus headquarters. Distributed servers throughout the campus access storage nodes that are also distributed. What are two (2) results o
The correct answer is A. increase in data accessibility C. increase in SAN I/O latency. Physically expanding a SAN across a campus increases data accessibility and application availability but also inherently leads to increased SAN I/O latency.
Question
A company has been expanding its SAN physically throughout its campus headquarters. Distributed servers throughout the campus access storage nodes that are also distributed. What are two (2) results of this expansion? (Choose two.)
Options
- Aincrease in data accessibility
- Bdecrease in resource utilzation
- Cincrease in SAN I/O latency
- Dincrease in application availability
- Edecrease in application availability
How the community answered
(17 responses)- A71% (12)
- B6% (1)
- D6% (1)
- E18% (3)
Why each option
Physically expanding a SAN across a campus increases data accessibility and application availability but also inherently leads to increased SAN I/O latency.
Distributing servers and storage nodes across a campus creates more access points and redundant paths to data, thereby increasing the overall data accessibility for users and applications.
Physical distribution of SAN resources typically aims to improve resilience and accessibility, which may lead to similar or increased resource utilization, not a decrease.
Physical distribution across a campus implies longer cable runs and potentially more network hops for SAN traffic, leading to increased signal propagation delays and consequently higher I/O latency for applications accessing the distributed storage.
While increasing application availability is a common goal and benefit of distributed SANs, 'increase in data accessibility' is a more direct and fundamental result of the physical distribution and a prerequisite for higher application availability.
A distributed SAN is designed to enhance resilience and availability by mitigating single points of failure, thus increasing application availability rather than decreasing it.
Concept tested: Distributed SAN infrastructure implications
Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/4_1/configuration/guides/zoning/zoning_41_cg/zoning_over_distance.html
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