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update NFS/RDMA documentation

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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>
This commit is contained in:
James Lentini 2008-06-02 15:33:59 -04:00 • committed by J. Bruce Fields
parent 496d6c32d4
commit 007de8b4fd
1 changed files with 44 additions and 31 deletions
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75
Documentation/filesystems/nfs-rdma.txt
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@ -5,7 +5,7 @@
################################################################################ ################################################################################
Author: NetApp and Open Grid Computing Author: NetApp and Open Grid Computing
Date: April 15, 2008 Date: May 29, 2008
Table of Contents Table of Contents
~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~
@ -60,16 +60,18 @@ Installation
The procedures described in this document have been tested with The procedures described in this document have been tested with
distributions from Red Hat's Fedora Project (http://fedora.redhat.com/). 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 An NFS/RDMA mount point can be obtained by using the mount.nfs command in
command in nfs-utils-1.1.1 or greater. To see which version of mount.nfs nfs-utils-1.1.2 or greater (nfs-utils-1.1.1 was the first nfs-utils version
you are using, type: 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, If the version is less than 1.1.2 or the command does not exist,
then you will need to install the latest version of nfs-utils. you should install the latest version of nfs-utils.
Download the latest package from: Download the latest package from:
@ -77,22 +79,32 @@ Installation
Uncompress the package and follow the installation instructions. Uncompress the package and follow the installation instructions.
If you will not be using GSS and NFSv4, the installation process If you will not need the idmapper and gssd executables (you do not need
can be simplified by disabling these features when running configure: 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 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, 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. 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. 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 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 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 - 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 this time. For example, if you are using a Mellanox Tavor/Sinai/Arbel
card: card:
> modprobe ib_mthca $ modprobe ib_mthca
> modprobe ib_ipoib $ modprobe ib_ipoib
If you are using InfiniBand, make sure there is a Subnet Manager (SM) 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 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: 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 4: ACTIVE
where driverX is mthca0, ipath5, ehca3, etc. 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 To further test the InfiniBand software stack, use IPoIB (this
assumes you have two IB hosts named host1 and host2): assumes you have two IB hosts named host1 and host2):
host1> ifconfig ib0 a.b.c.x host1$ ifconfig ib0 a.b.c.x
host2> ifconfig ib0 a.b.c.y host2$ ifconfig ib0 a.b.c.y
host1> ping a.b.c.y host1$ ping a.b.c.y
host2> ping a.b.c.x host2$ ping a.b.c.x
For other device types, follow the appropriate procedures. For other device types, follow the appropriate procedures.
@ -214,9 +226,9 @@ NFS/RDMA Setup
For InfiniBand using a Mellanox adapter: For InfiniBand using a Mellanox adapter:
> modprobe ib_mthca $ modprobe ib_mthca
> modprobe ib_ipoib $ modprobe ib_ipoib
> ifconfig ib0 a.b.c.d $ ifconfig ib0 a.b.c.d
NOTE: use unique addresses for the client and server 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), If the NFS/RDMA server was built as a module (CONFIG_SUNRPC_XPRT_RDMA=m in kernel config),
load the RDMA transport module: load the RDMA transport module:
> modprobe svcrdma $ modprobe svcrdma
Regardless of how the server was built (module or built-in), start the server: 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 or
> service nfs start $ service nfs start
Instruct the server to listen on the RDMA transport: 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 - On the client system
If the NFS/RDMA client was built as a module (CONFIG_SUNRPC_XPRT_RDMA=m in kernel config), If the NFS/RDMA client was built as a module (CONFIG_SUNRPC_XPRT_RDMA=m in kernel config),
load the RDMA client module: 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 To verify that the mount is using RDMA, run "cat /proc/mounts" and check the
"proto" field for the given mount. "proto" field for the given mount.