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I'm sure the absolute performance of the Telus II CPU is very good since it runs at 5.5Ghz and has 36MB of L2 cache per core. But I'm talking about price per do
by UltraSane 2y ago
I'm sure the absolute performance of the Telus II CPU is very good since it runs at 5.5Ghz and has 36MB of L2 cache per core. But I'm talking about price per dollar and this is where IBM mainframes fail miserably because IBM charges through the nose for them.
I would not be surprised if a IBM mainframe costs 10x of what a x86 or ARM server of equal performance does.
- rbanffy 2y agoPerformance is not a single number. Mainframes are terrible choices for HPC, AI training, data analytics, etc. Where they excel is that narrow niche of high-volume, real-time transaction processing. In order to get there, the whole design of the machine is carefully balanced - the right number of cores per socket, the cache sizes (and the dynamic allocation of L3 and L4 according to pressures, trying to minimize eviction) all the way to CICS, z/OS and the way they allocate memory and processing power.
- UltraSane 2y agoThe main selling points of z/OS and hardware is the amazing uptime and 60 years of backwards compatibility. There isn't a single computational workload that a IBM mainframe can do cheaper than a x86 server/cluster.