# cooling

Published articles for cooling.

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## What N, N+1, 2N, and 2(N+1) Mean in a Data Center

DevFeed: [What N, N+1, 2N, and 2(N+1) Mean in a Data Center](<https://devfeed.tech/articles/what-n-n-1-2n-and-2-n-1-mean-in-a-data-center-40160.md>)

Original publisher: [Read original article](<https://blog.j2sw.com/netops/data-center-redundancy-n-n1-2n/>)

Author: j2sw

Published: 2026-08-27T13:59:08Z

Content type: tutorial

Language: en

Sources: [Justin Wilson (j2sw)](<https://devfeed.tech/sources/justin-wilson-j2sw.md>)

Topics: [datacenter](<https://devfeed.tech/topics/datacenter.md>), [data](<https://devfeed.tech/topics/data.md>)

Tags: [2n-redundancy](<https://devfeed.tech/tags/2n-redundancy.md>), [capacity](<https://devfeed.tech/tags/capacity.md>), [colocation](<https://devfeed.tech/tags/colocation.md>), [components](<https://devfeed.tech/tags/components.md>), [cooling](<https://devfeed.tech/tags/cooling.md>), [data-center](<https://devfeed.tech/tags/data-center.md>), [data-center-power](<https://devfeed.tech/tags/data-center-power.md>), [equipment](<https://devfeed.tech/tags/equipment.md>), [internet-architecture](<https://devfeed.tech/tags/internet-architecture.md>), [maintenance](<https://devfeed.tech/tags/maintenance.md>), [n-plus-1-redundancy](<https://devfeed.tech/tags/n-plus-1-redundancy.md>), [network-operations](<https://devfeed.tech/tags/network-operations.md>), [power-distribution](<https://devfeed.tech/tags/power-distribution.md>), [system](<https://devfeed.tech/tags/system.md>), [ups](<https://devfeed.tech/tags/ups.md>)

### AI overview

This article explains what data center redundancy ratings N, N+1, N+2, 2N, and 2(N+1) indicate about component capacity, failures, maintenance, cooling, and alternate paths.

### Source excerpt

Have you ever looked at a data center marketing slick and wondered what N, N+1, 2N, and 2(N+1) actually mean? The main thing they tell you is how many components can fail before the system drops below the capacity needed to support the load. When I evaluate a data center, I want to know what ... Read more The post What N, N+1, 2N, and 2(N+1) Mean in a Data Center appeared first on Justin Wilson (j2sw).

## What makes a good data center?

DevFeed: [What makes a good data center?](<https://devfeed.tech/articles/what-makes-a-good-data-center-40197.md>)

Original publisher: [Read original article](<https://blog.j2sw.com/technology/what-makes-a-good-data-center/>)

Author: j2sw

Published: 2026-06-22T11:25:00Z

Content type: opinion

Language: en

Sources: [Justin Wilson (j2sw)](<https://devfeed.tech/sources/justin-wilson-j2sw.md>)

Topics: [datacenter](<https://devfeed.tech/topics/datacenter.md>), [Monitoring](<https://devfeed.tech/topics/monitoring.md>), [IXP](<https://devfeed.tech/topics/ixp.md>)

Tags: [colocation](<https://devfeed.tech/tags/colocation.md>), [cooling](<https://devfeed.tech/tags/cooling.md>), [data-center](<https://devfeed.tech/tags/data-center.md>), [dc](<https://devfeed.tech/tags/dc.md>), [infrastructure](<https://devfeed.tech/tags/infrastructure.md>), [ixp](<https://devfeed.tech/tags/ixp.md>), [monitoring](<https://devfeed.tech/tags/monitoring.md>), [network-operations](<https://devfeed.tech/tags/network-operations.md>), [power](<https://devfeed.tech/tags/power.md>), [remote](<https://devfeed.tech/tags/remote.md>), [technology-industry-commentary](<https://devfeed.tech/tags/technology-industry-commentary.md>)

### AI overview

The article presents a personal, surface-level framework for evaluating data centers, focusing on power redundancy, cooling and temperature monitoring, carrier diversity, interconnection neutrality, and physically diverse carrier routes.

### Source excerpt

A good data center is not about lobby photos or vendor language. It is about clean power, working cooling, clear cable paths, useful remote hands, and gear that can be repaired without fighting the building. The post What makes a good data center? appeared first on Justin Wilson (j2sw).

## What PoE+++ Is and Why High-Power Ethernet Matters

DevFeed: [What PoE+++ Is and Why High-Power Ethernet Matters](<https://devfeed.tech/articles/what-poe-is-and-why-high-power-ethernet-matters-40171.md>)

Original publisher: [Read original article](<https://blog.j2sw.com/netops/what-is-poe-plus-plus-plus/>)

Author: j2sw

Published: 2026-06-10T04:56:41Z

Content type: tutorial

Language: en

Sources: [Justin Wilson (j2sw)](<https://devfeed.tech/sources/justin-wilson-j2sw.md>)

Topics: [Ethernet](<https://devfeed.tech/topics/ethernet.md>), [networking](<https://devfeed.tech/topics/networking.md>), [Wi-Fi](<https://devfeed.tech/topics/wi-fi.md>), [Digital signage](<https://devfeed.tech/topics/digital-signage.md>), [clients](<https://devfeed.tech/topics/clients.md>)

Tags: [cameras](<https://devfeed.tech/tags/cameras.md>), [cooling](<https://devfeed.tech/tags/cooling.md>), [ethernet](<https://devfeed.tech/tags/ethernet.md>), [heat](<https://devfeed.tech/tags/heat.md>), [it-operations](<https://devfeed.tech/tags/it-operations.md>), [network-operations](<https://devfeed.tech/tags/network-operations.md>), [networking](<https://devfeed.tech/tags/networking.md>), [poe](<https://devfeed.tech/tags/poe.md>), [power](<https://devfeed.tech/tags/power.md>), [usb](<https://devfeed.tech/tags/usb.md>), [wi-fi-6](<https://devfeed.tech/tags/wi-fi-6.md>), [wireless](<https://devfeed.tech/tags/wireless.md>)

### AI overview

This article explains PoE+++ as a common reference to IEEE 802.3bt Type 3 or Type 4, which can deliver about 60 to 90 watts over all four Ethernet pairs. It describes how higher power enables devices such as Wi-Fi access points, PTZ cameras, digital signage, and thin clients, while increasing the importance of cable quality, heat management, switch cooling, and overall PoE budgets.

### Source excerpt

Learn what PoE+++ is, how 802.3bt increases Ethernet power delivery, and why high-wattage PoE matters for Wi-Fi, cameras, switches, and ISP deployments. The post What PoE+++ Is and Why High-Power Ethernet Matters appeared first on Justin Wilson (j2sw).

## Startup's nuclear-inspired cooling system could make data centers more sustainable

DevFeed: [Startup's nuclear-inspired cooling system could make data centers more sustainable](<https://devfeed.tech/articles/startup-s-nuclear-inspired-cooling-system-could-make-data-centers-more-sustainable-37977.md>)

Original publisher: [Read original article](<https://news.mit.edu/2026/nuclear-inspired-cooling-system-ferveret-could-make-data-centers-more-sustainable-0610>)

Author: Zach Winn | MIT News

Published: 2026-06-10T04:00:00Z

Content type: article

Language: en

Sources: [MIT AI News](<https://devfeed.tech/sources/mit-ai-news.md>)

Topics: [data centers](<https://devfeed.tech/topics/data-centers.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [cloud-infrastructure](<https://devfeed.tech/topics/cloud-infrastructure.md>), [Computer science](<https://devfeed.tech/topics/computer-science.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [ai-data-centers](<https://devfeed.tech/tags/ai-data-centers.md>), [artificial-intelligence](<https://devfeed.tech/tags/artificial-intelligence.md>), [computer-science-and-technology](<https://devfeed.tech/tags/computer-science-and-technology.md>), [cooling](<https://devfeed.tech/tags/cooling.md>), [data-center-cooling](<https://devfeed.tech/tags/data-center-cooling.md>), [data-center-sustainability](<https://devfeed.tech/tags/data-center-sustainability.md>), [data-centers](<https://devfeed.tech/tags/data-centers.md>), [efficiency](<https://devfeed.tech/tags/efficiency.md>), [energy](<https://devfeed.tech/tags/energy.md>), [energy-efficiency](<https://devfeed.tech/tags/energy-efficiency.md>), [energy-storage](<https://devfeed.tech/tags/energy-storage.md>), [ferveret](<https://devfeed.tech/tags/ferveret.md>), [matteo-bucci](<https://devfeed.tech/tags/matteo-bucci.md>), [nuclear-science-and-engineering](<https://devfeed.tech/tags/nuclear-science-and-engineering.md>), [power](<https://devfeed.tech/tags/power.md>), [reza-azizian](<https://devfeed.tech/tags/reza-azizian.md>), [school-of-engineering](<https://devfeed.tech/tags/school-of-engineering.md>), [startups](<https://devfeed.tech/tags/startups.md>), [sustainability](<https://devfeed.tech/tags/sustainability.md>), [sustainable-computing](<https://devfeed.tech/tags/sustainable-computing.md>), [technology-and-society](<https://devfeed.tech/tags/technology-and-society.md>), [water](<https://devfeed.tech/tags/water.md>)

### AI overview

Ferveret, a startup founded by two MIT researchers, is adapting nuclear-reactor heat-transfer methods to cool AI data-center servers with a specialized liquid. Its Adaptive Phase Cooling system uses small, frequently detaching bubbles to improve heat transfer without water and with less electricity.

### Source excerpt

Founded by two researchers from MIT, Ferveret reduces the amount of energy and water required to cool the chips that power AI.