Bruce,
Below is an update to the NFS/RDMA documentation that clarifies how to
run mount.nfs and addresses comments from you and Chuck. Could you
please merge this for 2.6.26?
Signed-off-by: James Lentini <jlentini@xxxxxxxxxx>
--- a/Documentation/filesystems/nfs-rdma.txt 2008-05-30 16:03:01.414533000 -0400
+++ a/Documentation/filesystems/nfs-rdma.txt 2008-06-02 15:26:51.138344000 -0400
@@ -5,7 +5,7 @@
################################################################################
Author: NetApp and Open Grid Computing
- Date: April 15, 2008
+ Date: May 29, 2008
Table of Contents
~~~~~~~~~~~~~~~~~
@@ -60,16 +60,18 @@ Installation
The procedures described in this document have been tested with
distributions from Red Hat's Fedora Project (http://fedora.redhat.com/).
- - Install nfs-utils-1.1.1 or greater on the client
+ - Install nfs-utils-1.1.2 or greater on the client
- An NFS/RDMA mount point can only be obtained by using the mount.nfs
- command in nfs-utils-1.1.1 or greater. To see which version of mount.nfs
- you are using, type:
+ An NFS/RDMA mount point can be obtained by using the mount.nfs command in
+ nfs-utils-1.1.2 or greater (nfs-utils-1.1.1 was the first nfs-utils version
+ with support for NFS/RDMA mounts, but for various reasons we recommend using
+ nfs-utils-1.1.2 or greater). To see which version of mount.nfs you are
+ using, type:
- > /sbin/mount.nfs -V
+ $ /sbin/mount.nfs -V
- If the version is less than 1.1.1 or the command does not exist,
- then you will need to install the latest version of nfs-utils.
+ If the version is less than 1.1.2 or the command does not exist,
+ you should install the latest version of nfs-utils.
Download the latest package from:
@@ -77,22 +79,32 @@ Installation
Uncompress the package and follow the installation instructions.
- If you will not be using GSS and NFSv4, the installation process
- can be simplified by disabling these features when running configure:
+ If you will not need the idmapper and gssd executables (you do not need
+ these to create an NFS/RDMA enabled mount command), the installation
+ process can be simplified by disabling these features when running
+ configure:
- > ./configure --disable-gss --disable-nfsv4
+ $ ./configure --disable-gss --disable-nfsv4
- For more information on this see the package's README and INSTALL files.
+ To build nfs-utils you will need the tcp_wrappers package installed. For
+ more information on this see the package's README and INSTALL files.
After building the nfs-utils package, there will be a mount.nfs binary in
the utils/mount directory. This binary can be used to initiate NFS v2, v3,
or v4 mounts. To initiate a v4 mount, the binary must be called mount.nfs4.
The standard technique is to create a symlink called mount.nfs4 to mount.nfs.
- NOTE: mount.nfs and therefore nfs-utils-1.1.1 or greater is only needed
+ This mount.nfs binary should be installed at /sbin/mount.nfs as follows:
+
+ $ sudo cp utils/mount/mount.nfs /sbin/mount.nfs
+
+ In this location, mount.nfs will be invoked automatically for NFS mounts
+ by the system mount commmand.
+
+ NOTE: mount.nfs and therefore nfs-utils-1.1.2 or greater is only needed
on the NFS client machine. You do not need this specific version of
nfs-utils on the server. Furthermore, only the mount.nfs command from
- nfs-utils-1.1.1 is needed on the client.
+ nfs-utils-1.1.2 is needed on the client.
- Install a Linux kernel with NFS/RDMA
@@ -156,8 +168,8 @@ Check RDMA and NFS Setup
this time. For example, if you are using a Mellanox Tavor/Sinai/Arbel
card:
- > modprobe ib_mthca
- > modprobe ib_ipoib
+ $ modprobe ib_mthca
+ $ modprobe ib_ipoib
If you are using InfiniBand, make sure there is a Subnet Manager (SM)
running on the network. If your IB switch has an embedded SM, you can
@@ -166,7 +178,7 @@ Check RDMA and NFS Setup
If an SM is running on your network, you should see the following:
- > cat /sys/class/infiniband/driverX/ports/1/state
+ $ cat /sys/class/infiniband/driverX/ports/1/state
4: ACTIVE
where driverX is mthca0, ipath5, ehca3, etc.
@@ -174,10 +186,10 @@ Check RDMA and NFS Setup
To further test the InfiniBand software stack, use IPoIB (this
assumes you have two IB hosts named host1 and host2):
- host1> ifconfig ib0 a.b.c.x
- host2> ifconfig ib0 a.b.c.y
- host1> ping a.b.c.y
- host2> ping a.b.c.x
+ host1$ ifconfig ib0 a.b.c.x
+ host2$ ifconfig ib0 a.b.c.y
+ host1$ ping a.b.c.y
+ host2$ ping a.b.c.x
For other device types, follow the appropriate procedures.
@@ -214,9 +226,9 @@ NFS/RDMA Setup
For InfiniBand using a Mellanox adapter:
- > modprobe ib_mthca
- > modprobe ib_ipoib
- > ifconfig ib0 a.b.c.d
+ $ modprobe ib_mthca
+ $ modprobe ib_ipoib
+ $ ifconfig ib0 a.b.c.d
NOTE: use unique addresses for the client and server
@@ -225,30 +237,31 @@ NFS/RDMA Setup
If the NFS/RDMA server was built as a module (CONFIG_SUNRPC_XPRT_RDMA=m in kernel config),
load the RDMA transport module:
- > modprobe svcrdma
+ $ modprobe svcrdma
Regardless of how the server was built (module or built-in), start the server:
- > /etc/init.d/nfs start
+ $ /etc/init.d/nfs start
or
- > service nfs start
+ $ service nfs start
Instruct the server to listen on the RDMA transport:
- > echo rdma 2050 > /proc/fs/nfsd/portlist
+ $ echo rdma 2050 > /proc/fs/nfsd/portlist
- On the client system
If the NFS/RDMA client was built as a module (CONFIG_SUNRPC_XPRT_RDMA=m in kernel config),
load the RDMA client module:
- > modprobe xprtrdma.ko
+ $ modprobe xprtrdma.ko
- Regardless of how the client was built (module or built-in), issue the mount.nfs command:
+ Regardless of how the client was built (module or built-in), use this command to
+ mount the NFS/RDMA server:
- > /path/to/your/mount.nfs <IPoIB-server-name-or-address>:/<export> /mnt -i -o rdma,port=2050
+ $ mount -o rdma,port=2050 <IPoIB-server-name-or-address>:/<export> /mnt
To verify that the mount is using RDMA, run "cat /proc/mounts" and check the
"proto" field for the given mount.
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