3 ms·
Sure but I don't think the 8 core epyc would actually keep up with that many NVME drives. At least not if you tried to actually hit 24+ of them at once. Linus
by kllrnohj 7y ago
Sure but I don't think the 8 core epyc would actually keep up with that many NVME drives. At least not if you tried to actually hit 24+ of them at once.
Linus tech tips tried this and had to upgrade the CPU from the 24 core epyc to the 32 core to get performance up to what they wanted. https://youtu.be/xWjOh0Ph8uM https://youtu.be/xWjOh0Ph8uM
Maybe just a bad deployment but there is overhead in filesystems. Especially with checksums and compression and redundancy and etc...
- Robotbeat 7y agoIt's possible to bypass the CPU in some cases using NVMe over an RDMA layer with Infiniband. PCIe 4.0 dual-port 200Gbps Infiniband/Ethernet adapters exist[1] which are compatible with this approach: https://store.mellanox.com/products/mellanox-mcx653106a-hdat-sp-single-pack-connectx-6-vpi-adapter-card-hdr-ib-and-200gbe-dual-port-qsfp56-pcie4-0-x16-tall-bracket.html https://store.mellanox.com/products/mellanox-mcx653106a-hdat... [1]Although you can't saturate both of them through even a 16 lane PCIe 4.0 port which has ~250Gbps of throughput each way.... Which to me means that PCIe 4.0 is not at all too soon.