NFS over SoftRoCE setup
From Linux NFS
Soft ROCE is a software implementation of RoCE that allows RDMA to be used on any Ethernet adapter. It is available in Linux kernels after 4.8. The following instructions are based on Arch Linux
Contents |
Client and Server Common Setup
- Check for the
rdma_rxe
kernel module. If you don't have it, then enable the following Kconfig options and rebuild your kernel
CONFIG_INFINIBAND CONFIG_INFINIBAND_RDMAVT CONFIG_RDMA_RXE
- Install the
rdma-core
package and use therxe_cfg
script to load the module and start an RDMA interface. Note that this does not survive reboots.
anna@gouda ~ % sudo rxe_cfg status rdma_rxe module not loaded Name Link Driver Speed NMTU IPv4_addr RDEV RMTU eth0 yes virtio_net anna@gouda ~ % sudo rxe_cfg start Name Link Driver Speed NMTU IPv4_addr RDEV RMTU eth0 yes virtio_net anna@gouda ~ % sudo rxe_cfg add eth0 anna@gouda ~ % sudo rxe_cfg status Name Link Driver Speed NMTU IPv4_addr RDEV RMTU eth0 yes virtio_net rxe0 1024 (3)
Ping Test
- Start an
rping
server on one machine
anna@server ~ % sudo rping -s -v -C 3 server ping data: rdma-ping-0: ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqr server ping data: rdma-ping-1: BCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrs server ping data: rdma-ping-2: CDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrst server DISCONNECT EVENT... wait for RDMA_READ_ADV state 10
- Now check that the connection works from another machine
anna@client ~ % sudo rping -c -a 255.255.255.255 -v -C 3 ping data: rdma-ping-0: ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqr ping data: rdma-ping-1: BCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrs ping data: rdma-ping-2: CDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrst client DISCONNECT EVENT...
NFS Setup
Server
- Install the
nfs-utils-rdma-server
package and enable thenfs-utils-rdma-server.service
service through systemd
Client
- Install the
nfs-utils-rdma-client
package and enable thenfs-utils-rdma-client.service
service through systemd - Mount the server to check that it worked
anna@client ~ % sudo mount -o rdma,port=20049,vers=4.1 192.168.100.215:/export anna@client ~ % mount | grep proto=rdma 192.168.100.215:/home/anna/tests/tests/anna/cthon on /nfs type nfs4 (rw,relatime,vers=4.1,rsize=524288,wsize=524288,proto=rdma,port=20049)