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I think that's a confusing reference to the fact that InfiniBand initially was supposed to be also a replacement for system-internal buses (i.e. a PCI replaceme
by detaro 5y ago
I think that's a confusing reference to the fact that InfiniBand initially was supposed to be also a replacement for system-internal buses (i.e. a PCI replacement), before PCIe took that place instead.
- monocasa 5y agoYeah that makes sense, it's an RDMA protocol, and PCIe has wayyyy more in common with infiniband then it does with legacy PCI.
- gnufx 5y agoI wasn't there, but understood it was intended for general machine-room -- I dislike "datacentres" -- use; Wikipedia implies it was intended for ~everything... Anyway, IB at least had lower latency than Myrinet, which is what counts in a lot of HPC. I don't remember the numbers, but I got quite close to Myrinet latency with the on-board 1GbE NICs on Sun x2200s, an un-managed switch, and Open-MX, which was interoperable with the Myrinet MX protocol. (I remember MX being slagged off by Mellanox; I don't know how similar MXM later was for IB.)