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300-610 · Question #201

An engineer is configuring a Cisco UCS Service Profile template for an environment that will host Windows servers. Some of the servers require access to a Fibre Channel storage network. The design req

The correct answer is A. Set LUN Queue Depth to 240. An engineer must configure a Cisco UCS Service Profile template for Windows servers requiring Fibre Channel storage, optimizing the HBA to send the maximum number of commands per transmission.

Storage Network Design

Question

An engineer is configuring a Cisco UCS Service Profile template for an environment that will host Windows servers. Some of the servers require access to a Fibre Channel storage network. The design requires the server HBA to send the maximum number of commands to a Fibre Channel disk using a single transmission. Which action must be taken to meet these requirements?

Options

  • ASet LUN Queue Depth to 240
  • BDecrease Link Down Timeout to 20.000
  • CDisable 10 Timeout Retry
  • DIncrease Max Data Field Size to 2096

How the community answered

(39 responses)
  • A
    87% (34)
  • B
    3% (1)
  • C
    8% (3)
  • D
    3% (1)

Why each option

An engineer must configure a Cisco UCS Service Profile template for Windows servers requiring Fibre Channel storage, optimizing the HBA to send the maximum number of commands per transmission.

ASet LUN Queue Depth to 240Correct
BDecrease Link Down Timeout to 20.000

Decreasing Link Down Timeout to 20,000 makes the link respond faster to link failures but does not affect the number of commands sent to a Fibre Channel disk at a single time.

CDisable 10 Timeout Retry

Disabling I/O Timeout Retry might prevent retransmissions but does not impact the number of commands the HBA can send concurrently to a Fibre Channel disk.

DIncrease Max Data Field Size to 2096

Increasing Max Data Field Size typically refers to the maximum size of the payload within a Fibre Channel frame, which can affect the efficiency of large data transfers but is not directly related to the number of concurrent I/O commands (queue depth).

Concept tested: Cisco UCS Fibre Channel HBA optimization (Queue Depth)

Source: https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/sw/gui/config/guide/3_0/b_UCSM_GUI_Configuration_Guide_3_0/b_UCSM_GUI_Configuration_Guide_3_0_chapter_01000.html

Topics

#UCS Service Profile#Fibre Channel#LUN Queue Depth#Storage optimization

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