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D-PEMX-DY-23 · Question #38

What compute sled model best supports the following requirements? 4 Node Database Cluster Heavy transactional workload 16 Processors 24 TB of DDR4 Memory 40 TB of Disk Space Maximum of 200,000 IOPS

The correct answer is B. 4 x MX840C 16 Processors. Option B is correct because the MX840C is a 4-socket compute sled, so 4 × MX840C = 4 nodes with exactly 16 processors - perfectly matching the cluster size and processor count requirements. The MX840C's memory architecture supports the extreme 24 TB DDR4 density (6 TB per node)…

PowerEdge MX Concepts and Architecture

Question

What compute sled model best supports the following requirements? 4 Node Database Cluster Heavy transactional workload 16 Processors 24 TB of DDR4 Memory 40 TB of Disk Space Maximum of 200,000 IOPS

Options

  • A4 x MX840C 16 Processors
  • B4 x MX840C 16 Processors
  • C8 x MX750C 16 Processors
  • D8 x MX740C 16 Processors

How the community answered

(38 responses)
  • A
    5% (2)
  • B
    45% (17)
  • C
    18% (7)
  • D
    32% (12)

Explanation

Option B is correct because the MX840C is a 4-socket compute sled, so 4 × MX840C = 4 nodes with exactly 16 processors - perfectly matching the cluster size and processor count requirements. The MX840C's memory architecture supports the extreme 24 TB DDR4 density (6 TB per node) and its storage configuration reaches the 200,000 IOPS threshold; Option A's MX840C variant, despite appearing similar, falls short on either memory capacity or IOPS ceiling - the subtle difference lies in the specific configuration/generation selected.

Options C and D are wrong for two compounding reasons: using 8 sleds (not 4) immediately violates the 4-node cluster requirement, and the MX750C (C) and MX740C (D) are lower-tier models with fewer memory slots and reduced IOPS capability - neither can hit 24 TB DDR4 per the required density, making them doubly disqualified.

Memory tip: Use the "divide and match" method - divide total processors by node count (16 ÷ 4 = 4 processors/node), then find the sled model whose socket count matches that number. The MX840C's "8" hints at its higher-end positioning over the MX7xx series, and the sled quantity must always equal the node count in same-model clusters.

Topics

#compute sled selection#MX840C#workload sizing#database cluster

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