Didn't you still think that zfs is not a bit slow for nfs file service (real clients or for any vm/container) ? 2x Srv, Xeon 62xy, 192G, 13x18T r6 xfs, 100Gb connectx6, ipoib, nfs4: ./elbencho -r -b 1M -t 8 -s 10g --direct F{1..8} OPERATION RESULT TYPE FIRST DONE LAST DONE ========= ================ ========== ========= READ Elapsed time : 7.151s 7.786s IOPS : 10789 10521 Throughput MiB/s : 10789 10521 Total MiB : 77157 81920 --- 09:01:35 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:36 PM ibp216s0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 09:01:36 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:37 PM ibp216s0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 09:01:37 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:38 PM ibp216s0 1500050.00 53390.00 3055651.88 3698.86 0.00 0.00 0.00 25.03 09:01:38 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:39 PM ibp216s0 5653739.00 200654.00 11516727.26 13894.61 0.00 0.00 0.00 94.35 09:01:39 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:40 PM ibp216s0 5705062.00 203018.00 11621316.50 14052.73 0.00 0.00 0.00 95.20 09:01:40 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:41 PM ibp216s0 5620242.00 196400.00 11448537.04 13633.62 0.00 0.00 0.00 93.79 09:01:41 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:42 PM ibp216s0 5699689.00 187514.00 11610387.99 13142.38 0.00 0.00 0.00 95.11 09:01:42 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:43 PM ibp216s0 5713953.00 186006.00 11639418.27 13060.07 0.00 0.00 0.00 95.35 09:01:43 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:44 PM ibp216s0 5725531.00 193176.00 11663012.59 13484.04 0.00 0.00 0.00 95.54 09:01:44 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:45 PM ibp216s0 5610783.00 187174.00 11429270.82 13089.09 0.00 0.00 0.00 93.63 09:01:45 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:46 PM ibp216s0 1942932.00 62188.00 3957775.14 4379.84 0.00 0.00 0.00 32.42 09:01:46 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:47 PM ibp216s0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 09:01:47 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s %ifutil 09:01:48 PM ibp216s0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

And still not tried creating snapshots as reflink copies or even tried duperemove ? Then dream on with zfs.