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HP0-J73 · Question #114

A customer wants to upgrade their backup architecture and is considering a backup-to-tape solution. They want to achieve the highest performance possible with this solution. Which critical performance

The correct answer is A. The ability to keep the device streaming. Tape drive performance is critically dependent on maintaining a continuous data stream to the device. Interruptions cause the tape to reposition, drastically reducing throughput.

Storage Industry Concepts and Terminology

Question

A customer wants to upgrade their backup architecture and is considering a backup-to-tape solution. They want to achieve the highest performance possible with this solution. Which critical performance factor should they consider when choosing a tape device?

Exhibit

HP0-J73 question #114 exhibit

Options

  • AThe ability to keep the device streaming
  • BThe capacity of the tape cartridges
  • CThe type of backup software being used
  • DThe type of data to be backed up

How the community answered

(18 responses)
  • A
    89% (16)
  • B
    6% (1)
  • C
    6% (1)

Why each option

Tape drive performance is critically dependent on maintaining a continuous data stream to the device. Interruptions cause the tape to reposition, drastically reducing throughput.

AThe ability to keep the device streamingCorrect

Tape drives reach peak throughput only when data is fed to them continuously in a process called streaming. If the host cannot supply data fast enough, the tape stops, rewinds slightly, and repositions - a behavior called shoe-shining - which can reduce effective throughput by 50% or more. Ensuring the device stays in streaming mode is the single most impactful performance factor for tape.

BThe capacity of the tape cartridges

Cartridge capacity determines how much data fits on a tape, not how fast that data is written or read.

CThe type of backup software being used

Backup software governs scheduling, deduplication, and cataloging features but does not control the physical streaming behavior of the tape hardware.

DThe type of data to be backed up

The type of data affects compression ratios and deduplication savings but is not the critical hardware-level performance factor for a tape device.

Concept tested: Tape drive streaming performance optimization

Source: https://www.hpe.com/h20195/v2/GetPDF.aspx/4AA4-6881ENW.pdf

Topics

#tape backup#streaming#performance#backup strategy

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