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Non-Volatile Memory Express is a new protocol for accessing high-speed storage media. There are numerous benefits that are far beyond as compared to legacy protocols.

What is NVMe?

It is a high-performance, NUMA (Non-Uniform Memory Access) optimized, and highly scalable storage protocol. It connects the host to the memory subsystem.

It is a new technology and the latest protocol. It is designed from the ground up for non-volatile memory media (NAND and Persistent Memory). You will see that it is directly connected to the CPU via the PCIe interface.

pcie ports for nvme

It is built on high-speed PCIe lanes. PCIe Gen 3.0 link is famous for transfer speed two times more than the SATA interface.

The NVMe Value Proposition

This technology capitalizes on parallel, low latency data paths to the underlying media. This protocol is similar to high-performance processor architectures. You get accelerated existing applications that demand high performance.

And it enables new applications and capabilities for real-time workload processing. NVMe can handle rigorous application workloads with the least infrastructure footprint. You can reduce the total cost of ownership.

NVMe Architecture – Understanding I/O Queues

  • NVMe can support multiple I/O queues
  • 64K with each queue having 64K entries
  • The NVMe host software can create queues
  • It supports scatter/gather IOs
  • It minimizes CPU overhead on data transfers
  • It provides the capability of changing their priority based on workload requirements

How Do NVMe Commands Work?

The host writes I/O Command Queues and doorbell registers (I/O Commands Ready Signal). NVMe controller picks the I/O Command Queues.

It executes them and sends I/O Completion Queues, followed by an interrupt to the host. The host records I/O Completion Queues and clears the door register (I/O Commands Completion Signal).

how nvme commands work

Why NVMe Gets the Most Performance from Multicore Processors?

NVMe, a NUMA-optimized protocol, allows for multiple CPU cores to share the ownership of queues. It enhances their priority, as well as arbitration mechanisms and atomicity of the commands.

NVMe SSDs can scatter/ gather commands and process them out of turn to offer far higher IOPS and lower data latencies.

NVMe Form Factor and Standards

It is a collection of standards managed by a consortium, currently the industry standard for PCIe solid-state drives for all form factors. A standard 2.5” U.2 form factor, internal mounted M.2, Add In Card (AIC), and various EDSFF form factors.

Why Is NVMe Important for your Business?

The big enterprise systems are based entirely on data to enhance their performance and productivity. The latest apps and scenarios are demanding more and more data processing from organizations and individuals.

nvme servers

High-performance SSDs are also bogged down even when they are connected with the legacy storage protocol. Your entire system slows down because of the low data flow around the whole organization.

This means a decrease in the performance and productivity of the entire system. Designed for high performance and non-volatile storage media, NVMe proves itself to be the one and only protocol for the organizations to solve their data-related issues.

Highly demanding and compute-intensive enterprise or cloud and edge data ecosystems love to utilize this protocol to maximize their efficiency.

When you get a dedicated server from 1Gbits, you have the luxury of customizing it with NVMe storages. Simply contact our support team and we will set it up for you!



author img

Nisal N

I’m a Computer Engineering student and I always had a very strong passion for computers and networking. It always fascinated me how this technology functions and now I enjoy learning new things and also sharing my knowledge with fellow curiosity seekers out there.

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