There is the file I can locally read in one thread ~55 GB/s, [root@localhost anton]# fio --name=test --rw=read --bs=128k --filename=/mnt/testfile --direct=1 --numjobs=1 --iodepth=64 --exitall --group_reporting --ioengine=io_uring --runtime=30 --time_based test: (g=0): rw=read, bs=(R) 128KiB-128KiB, (W) 128KiB-128KiB, (T) 128KiB-128KiB, ioengine=io_uring, iodepth=64 fio-3.39-31-gc283 Starting 1 process Jobs: 1 (f=1): [R(1)][100.0%][r=51.6GiB/s][r=422k IOPS][eta 00m:00s] test: (groupid=0, jobs=1): err= 0: pid=19114: Sat Apr 5 18:52:55 2025 read: IOPS=423k, BW=51.7GiB/s (55.5GB/s)(1551GiB/30001msec) I exported the file to the NFS client (hw exactly the same as NFS server), which is directly connected using 200 Gbps ConnectX-7 and 2m DAC cable. Without nconnect option, reading in exactly the same way as locally I got 4GB/s With nconnect=2, 8GB/s With nconnect=4, 15GB/s With nconnect=6, 15.5 GB/s With nconnect=8, 15.8 GB/s Why it doesn't scales up to 23-24 GB/s with increasing number of nconnect=4+ ?
