Can I use optics?
While optical networking is possible with immersion, it does require some specialized components to work reliably. Some immersion enthusiasts and newer providers claim that you can use any standard fiber optic cable/connector in an immersion environment. However, we have found that to not be factual and/or a reliable way to deal with fiber optics in immersion.
Optical networking is based on the refraction of light through mediums of varying refractive indices (air, fiber cables, connectors, etc.) when a liquid fills a space that was designed to be an air gap, it changes the refractive index and can cause signal loss. In a static environment this could be resolved by optimizing the refractive index of the liquid. In a dynamic environment, however, such as an Immersion Cooling rack, the flow of the liquid, the variation in its density (due to temperature variation) that causes a change in the refractive index of the coolant, and the possibility of bubbles getting trapped in the miniscule gaps can all cause issues with signal reliability.
In addition, materials used in the optical transceivers may not be suitable for operation in immersion fluids. This may result in discoloration, which in turn has an effect on the light signal which travels through these materials.
Hence, both GRC and Asperitas recommend using specialized optical cables and connectors that deliver a much more reliable connection and signal stability.
Does it mean all the components are different?
No. Standard components – from motherboards, PSUs, memory, storage and CPUs to GPUs can be used. Saying this, GRC and Asperitas use various optimized components to increase lifespan and performance.
Can I use Immersion Cooling for storage, networking and compute?
Yes, you can. Both GRC and Asperitas have a track record in delivery a range of systems including all components.
How about warranty on hardware and components, will it remain?
Several OEMs offer standard warranty and both GRC and Asperitas are working closely with system integrators and OEMs to offer you warranty models meeting your expectations.
Can I service IT hardware which has been immersed?
Yes, you can. Components can be replaced, and GRC and Asperitas are offering different approaches to do so. The horizontal, open rack design allows easy access to each immersed server individually.
Can I run Immersion Cooling systems in any datacenter?
Yes, you can. Generally though, Immersion Cooling requires a water circuit running to the systems, which may be more than what you are used to.
Can I take Immersion Cooling to my colocation provider?
Usually, colocation providers will be happy to facilitate Immersion Cooling, it will allow them to facilitate high density environments without having to make large investments. Both GRC and Asperitas are working with several colocation providers as partners.
What about the floor loading?
Liquid-Immersion-Cooling systems such as those offered by GRC and Asperitas are designed to be installed on raised floors and concrete slabs alike. And while it may seem obvious, it is important to point out that when talking about floor loading, pressure on the floor is a more important consideration than gross weight alone. Because our racks are horizontal, they help evenly spread weight across their footprint, yielding a floor loading that is often less than that of an air-cooled rack. Actually, liquid-Immersion Cooling eliminates the need for raised floors entirely, but if you already have a raised-floor infrastructure there is no need to remove it, and likely no need to reinforce or modify it in any way.
What about floor space utilization?
While it is true that an individual horizontal rack has a slightly larger footprint than a vertical rack, when you look at the fully burdened datacenter footprint, Immersion Cooling produces significant space savings: no hot/cold aisles or high ceilings are required, neither is room for air circulation. Immersion Cooling does not need the height you will see in traditional datacenters, in fact in most cases the same data hall can be designed to have two levels with Immersion Cooling instead of just one traditional level. With immersion you will achieve a higher performance and more IT power per unit area.
I need to comply with several standards and certifications, is Immersion Cooling compliant?
GRC and Asperitas systems are compliant to the most common system certifications, check your specific provider for details or for tailored certifications for your application. We have track records in serving customers and delivering to datacenters with the highest requirements possible.