update NFS/RDMA documentation
Update the NFS/RDMA documentation to clarify how to run mount.nfs. Signed-off-by: James Lentini <jlentini@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
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James Lentini
J. Bruce Fields
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@ -5,7 +5,7 @@
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################################################################################
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Author: NetApp and Open Grid Computing
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Date: April 15, 2008
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Date: May 29, 2008
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Table of Contents
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~~~~~~~~~~~~~~~~~
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@ -60,16 +60,18 @@ Installation
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The procedures described in this document have been tested with
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distributions from Red Hat's Fedora Project (http://fedora.redhat.com/).
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- Install nfs-utils-1.1.1 or greater on the client
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- Install nfs-utils-1.1.2 or greater on the client
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An NFS/RDMA mount point can only be obtained by using the mount.nfs
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command in nfs-utils-1.1.1 or greater. To see which version of mount.nfs
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you are using, type:
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An NFS/RDMA mount point can be obtained by using the mount.nfs command in
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nfs-utils-1.1.2 or greater (nfs-utils-1.1.1 was the first nfs-utils version
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with support for NFS/RDMA mounts, but for various reasons we recommend using
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nfs-utils-1.1.2 or greater). To see which version of mount.nfs you are
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using, type:
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> /sbin/mount.nfs -V
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$ /sbin/mount.nfs -V
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If the version is less than 1.1.1 or the command does not exist,
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then you will need to install the latest version of nfs-utils.
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If the version is less than 1.1.2 or the command does not exist,
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you should install the latest version of nfs-utils.
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Download the latest package from:
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@ -77,22 +79,32 @@ Installation
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Uncompress the package and follow the installation instructions.
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If you will not be using GSS and NFSv4, the installation process
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can be simplified by disabling these features when running configure:
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If you will not need the idmapper and gssd executables (you do not need
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these to create an NFS/RDMA enabled mount command), the installation
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process can be simplified by disabling these features when running
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configure:
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> ./configure --disable-gss --disable-nfsv4
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$ ./configure --disable-gss --disable-nfsv4
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For more information on this see the package's README and INSTALL files.
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To build nfs-utils you will need the tcp_wrappers package installed. For
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more information on this see the package's README and INSTALL files.
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After building the nfs-utils package, there will be a mount.nfs binary in
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the utils/mount directory. This binary can be used to initiate NFS v2, v3,
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or v4 mounts. To initiate a v4 mount, the binary must be called mount.nfs4.
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The standard technique is to create a symlink called mount.nfs4 to mount.nfs.
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NOTE: mount.nfs and therefore nfs-utils-1.1.1 or greater is only needed
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This mount.nfs binary should be installed at /sbin/mount.nfs as follows:
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$ sudo cp utils/mount/mount.nfs /sbin/mount.nfs
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In this location, mount.nfs will be invoked automatically for NFS mounts
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by the system mount commmand.
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NOTE: mount.nfs and therefore nfs-utils-1.1.2 or greater is only needed
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on the NFS client machine. You do not need this specific version of
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nfs-utils on the server. Furthermore, only the mount.nfs command from
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nfs-utils-1.1.1 is needed on the client.
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nfs-utils-1.1.2 is needed on the client.
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- Install a Linux kernel with NFS/RDMA
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@ -156,8 +168,8 @@ Check RDMA and NFS Setup
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this time. For example, if you are using a Mellanox Tavor/Sinai/Arbel
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card:
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> modprobe ib_mthca
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> modprobe ib_ipoib
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$ modprobe ib_mthca
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$ modprobe ib_ipoib
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If you are using InfiniBand, make sure there is a Subnet Manager (SM)
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running on the network. If your IB switch has an embedded SM, you can
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@ -166,7 +178,7 @@ Check RDMA and NFS Setup
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If an SM is running on your network, you should see the following:
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> cat /sys/class/infiniband/driverX/ports/1/state
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$ cat /sys/class/infiniband/driverX/ports/1/state
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4: ACTIVE
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where driverX is mthca0, ipath5, ehca3, etc.
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@ -174,10 +186,10 @@ Check RDMA and NFS Setup
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To further test the InfiniBand software stack, use IPoIB (this
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assumes you have two IB hosts named host1 and host2):
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host1> ifconfig ib0 a.b.c.x
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host2> ifconfig ib0 a.b.c.y
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host1> ping a.b.c.y
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host2> ping a.b.c.x
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host1$ ifconfig ib0 a.b.c.x
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host2$ ifconfig ib0 a.b.c.y
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host1$ ping a.b.c.y
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host2$ ping a.b.c.x
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For other device types, follow the appropriate procedures.
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@ -214,9 +226,9 @@ NFS/RDMA Setup
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For InfiniBand using a Mellanox adapter:
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> modprobe ib_mthca
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> modprobe ib_ipoib
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> ifconfig ib0 a.b.c.d
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$ modprobe ib_mthca
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$ modprobe ib_ipoib
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$ ifconfig ib0 a.b.c.d
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NOTE: use unique addresses for the client and server
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@ -225,30 +237,31 @@ NFS/RDMA Setup
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If the NFS/RDMA server was built as a module (CONFIG_SUNRPC_XPRT_RDMA=m in kernel config),
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load the RDMA transport module:
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> modprobe svcrdma
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$ modprobe svcrdma
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Regardless of how the server was built (module or built-in), start the server:
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> /etc/init.d/nfs start
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$ /etc/init.d/nfs start
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or
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> service nfs start
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$ service nfs start
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Instruct the server to listen on the RDMA transport:
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> echo rdma 2050 > /proc/fs/nfsd/portlist
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$ echo rdma 2050 > /proc/fs/nfsd/portlist
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- On the client system
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If the NFS/RDMA client was built as a module (CONFIG_SUNRPC_XPRT_RDMA=m in kernel config),
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load the RDMA client module:
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> modprobe xprtrdma.ko
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$ modprobe xprtrdma.ko
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Regardless of how the client was built (module or built-in), issue the mount.nfs command:
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Regardless of how the client was built (module or built-in), use this command to
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mount the NFS/RDMA server:
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> /path/to/your/mount.nfs <IPoIB-server-name-or-address>:/<export> /mnt -i -o rdma,port=2050
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$ mount -o rdma,port=2050 <IPoIB-server-name-or-address>:/<export> /mnt
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To verify that the mount is using RDMA, run "cat /proc/mounts" and check the
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"proto" field for the given mount.
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