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Configuring NFS and Samba servers to export Lustre file systems5–4

5.1.3 Configuration factors for multiple NFS servers

NFS services may be configured to expand the throughput and performance of the NFS services to the NFS

client systems by having multiple NFS servers. The basic setup procedure of an NFS server is not affected

by the use of multiple NFS servers; however, the following guidelines are recommended:

• All NFS servers that are exporting the same file system must export it by the same name.

• NFS client systems should be uniformly distributed across the multiple NFS servers. This is done using

the fstab entry of the NFS client system (or automounter maps).

• If using the fsid capability in an NFS export entry, this fsid must be the same across all of the NFS

servers that are exporting the same file system.

• HP SFS Version 2.2-0 supports a maximum of four NFS servers. Using more than four servers is not

supported at this time.

5.1.3.1 An example configuration with multiple NFS servers

Figure 5-1 shows an example of a system configured to serve a Lustre file system via NFS. In this

configuration, there are four NFS servers (Nfsgate1, Nfsgate2, Nfsgate3, Nfsgate4), and four NFS client

systems.

Figure 5-1 Example configuration with four NFS servers

Each of the NFS servers has the following entries in its /etc/exports file:

/mnt/lustre *(rw,sync)

Each of the NFS client systems has the following entries in its /etc/fstab files:

• NFS Client #1:

Nfsgate1:/mnt/lustre /mnt/lustre nfs nfsvers=3,tcp,rw,rsize=32768,wsize=32768 0 0

• NFS Client #2:

Nfsgate2:/mnt/lustre /mnt/lustre nfs nfsvers=3,tcp,rw,rsize=32768,wsize=32768 0 0

• NFS Client #3:

Nfsgate3:/mnt/lustre /ant/lustre nfs nfsvers=3,tcp,rw,rsize=32768,wsize=32768 0 0

• NFS Client #4:

Nfsgate4:/mnt/lustre /mnt/lustre nfs nfsvers=3,tcp,rw,rsize=32768,wsize=32768 0 0

Note that the NFS client systems are uniformly distributed across the four NFS servers.

HP SFS System

SFS Client & NFS Server

Nfsgate1

SFS Client & NFS Server

Nfsgate2

SFS Client & NFS Server

Nfsgate3

SFS Client & NFS Server

Nfsgate4

InfiniBand switch(s)

Gigabit switch(s)

NFS Client 1 NFS Client 2 NFS Client 3 NFS Client 4

1 2 ... 75 76 77 78 79 80 81 82 83 84 85 ... 133 134

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