On Wed, 9 Oct 2019 at 23:09, Sam Varshavchik <mr...@courier-mta.com> wrote:
> My C++ compiles are getting longer. It's time to get new hardware, but > I'm > having some difficulty finding Fedora-friendly hardware, that's slightly > above average grade, such as dual CPU and spinning rust (I haven't gotten > quite aboard the SSD train, with its built-in expiration date). > SSD should greatly reduce compile times for large codes. You can greatly extend the SSD expiration date by not allowing them to fill up. Before I retired I working with a group that did remote sensing, which involves large amounts of data. Mechanical drives routinely failed on or about the end of warranty, showing that the manufacturers have very good understanding of the lifetime under heavy use. This makes stripped disk arrays for better thruput very reliable during the warranty. SSD's should be even better understood, and the failure modes should be easily monitored, so self-testing and reporting should be better than for mechanical drives. In general, multiple CPU's only make sense if you need more cores than you can get (or afford) on one CPU. The exception might be cases like compiles where there are lots of independent processes and you benefit from double the cache, but you can also get CPU models with more cache. There are extra costs for sockets, cooling, etc for 2 CPU systems, so in most cases you will be better off with at least one SSD and a higher-end (more cores and more cache) single CPU. Intel is like automakers who try to get you to buy features you don't really need. They can charge more for higher CPU clock speeds than the increase thruput warrants. For the remote sensing workloads it was better to buy cheaper CPU's and spend more on mass storage. Phoronix.com has lots of linux benchmark results that include compiles. -- George N. White III
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