Clear DefinitionsNVMe Drive
1 min read
Pronunciation
[en-vee-em-ee drahyv]
Analogy
Like upgrading from a dirt road to a six‑lane highway for your data, NVMe drives let blocks and state be read and written much faster.
Definition
A storage device that uses Non‑Volatile Memory Express protocol over PCIe to deliver high‑throughput, low‑latency access to flash memory, significantly outperforming SATA SSDs for blockchain node storage.
Key Points Intro
NVMe drives accelerate blockchain I/O with parallel, direct PCIe access to flash memory.
Key Points
Low latency: Direct PCIe lanes bypass SATA controller overhead.
High IOPS: Thousands of parallel queues and commands.
Throughput: Multiple GB/s read/write speeds.
Form factors: M.2, U.2, and add‑in cards.
Example
Technical Deep Dive
NVMe uses up to 64K command queues with 64K entries each, communicating via PCIe root complex. Controller firmware optimizes wear leveling and garbage collection for sustained performance.
Caveat
Higher cost per GB than SATA SSD; balance budget and performance needs.
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