<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>adev_</author><text>&amp;gt; It always made me wonder why liquid cooling wasn&amp;#x27;t more of a thing for datacenters.&lt;p&gt;Liquid cooling is almost a defacto-standard in data centers in the HPC world. The Top of the TOP500 machines are all liquid cooled. Not by choice, but due to physics constraints.&lt;p&gt;There is a big gap in power density between the HPC world and the usual datacenter-commodity-hardware world.&lt;p&gt;Commodity DS are designed with the assumption that the average machine will run with a fraction of it&amp;#x27;s maximum load. HPC systems at the opposite are designed to operate safely at 100% load all the time.&lt;p&gt;In a previous company where I worked, we attempted to install a medium size HPC cluster in a well-known commerical datacenter and network provider. The commercial of the DS almost felt from his chair when we announced the power requirements.</text><parent_chain><item><author>cogman10</author><text>It always made me wonder why liquid cooling wasn&amp;#x27;t more of a thing for datacenters.&lt;p&gt;Water has a massive amount of thermal capacity and can quickly and in bulk be cooled to optimal temperatures.  You&amp;#x27;d probably still need fans and AC to dissipate heat of non-liquid cooled parts, but for the big energy items like CPUs and GPUs&amp;#x2F;compute engines, you could ship out huge amounts of heat fairly quickly and directly.&lt;p&gt;I guess the complexity and risk of a leak would be a problem, but for amazon sized data centers that doesn&amp;#x27;t seem like a major concern.</text></item><item><author>LASR</author><text>The hardware &amp;#x2F; datacenter side of this is equally fascinating.&lt;p&gt;I used to work in AWS, but on the software &amp;#x2F; services side of things. But now and then, we would crash some talks from the datacenter folks.&lt;p&gt;One key relevation for me was that increasing compute power in DCs is primarily a thermodynamics problem than actual computing. The nodes have become so dense that shipping power in and shipping heat out, with all kinds of redundancies is an extremely hard problem. And it&amp;#x27;s not like you can perform a software update if you&amp;#x27;ve discovered some inefficiencies.&lt;p&gt;This was ~10 years ago, so probably some things have changed.&lt;p&gt;What blows me away is that Amazon, starting out as an internet bookstore is at the cutting edge of solving thermodynamics problems.</text></item></parent_chain></comment><story><title>The art of high performance computing</title><url>https://theartofhpc.com/</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>lub</author><text>OVH prominently uses water cooling including custom components with their own design.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;blog.ovhcloud.com&amp;#x2F;water-cooling-from-innovation-to-disruption-part-i&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;blog.ovhcloud.com&amp;#x2F;water-cooling-from-innovation-to-d...&lt;/a&gt;&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;blog.ovhcloud.com&amp;#x2F;water-cooling-from-innovation-to-disruption-part-ii&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;blog.ovhcloud.com&amp;#x2F;water-cooling-from-innovation-to-d...&lt;/a&gt;&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;blog.ovhcloud.com&amp;#x2F;new-hybrid-immersion-liquid-cooling-developments-at-ovhcloud&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;blog.ovhcloud.com&amp;#x2F;new-hybrid-immersion-liquid-coolin...&lt;/a&gt;</text><parent_chain><item><author>cogman10</author><text>It always made me wonder why liquid cooling wasn&amp;#x27;t more of a thing for datacenters.&lt;p&gt;Water has a massive amount of thermal capacity and can quickly and in bulk be cooled to optimal temperatures.  You&amp;#x27;d probably still need fans and AC to dissipate heat of non-liquid cooled parts, but for the big energy items like CPUs and GPUs&amp;#x2F;compute engines, you could ship out huge amounts of heat fairly quickly and directly.&lt;p&gt;I guess the complexity and risk of a leak would be a problem, but for amazon sized data centers that doesn&amp;#x27;t seem like a major concern.</text></item><item><author>LASR</author><text>The hardware &amp;#x2F; datacenter side of this is equally fascinating.&lt;p&gt;I used to work in AWS, but on the software &amp;#x2F; services side of things. But now and then, we would crash some talks from the datacenter folks.&lt;p&gt;One key relevation for me was that increasing compute power in DCs is primarily a thermodynamics problem than actual computing. The nodes have become so dense that shipping power in and shipping heat out, with all kinds of redundancies is an extremely hard problem. And it&amp;#x27;s not like you can perform a software update if you&amp;#x27;ve discovered some inefficiencies.&lt;p&gt;This was ~10 years ago, so probably some things have changed.&lt;p&gt;What blows me away is that Amazon, starting out as an internet bookstore is at the cutting edge of solving thermodynamics problems.</text></item></parent_chain></comment><story><title>The art of high performance computing</title><url>https://theartofhpc.com/</url></story>