Recommended NFS Mount Options

IN THIS ARTICLE

NOTES / DESCRIPTION OF OPTIONS:

The combination of the mount options “intr” (Interrupt) and “hard” (Hard Mount) provide the best balance of data integrity and client stability in the event of a client disconnection from the server.
The “tcp” option ensures that TCP is used during the mount phase and data transfer, greatly speeding up mount times in some environments. (Qumulo does not support UDP)
With modern Linux distributions there is no need to specify most NFS mount options as the client will auto-negotiate the mount string with the server, including setting up a 1MB send/receive block size.
The Local Locks options listed below are provided for compatibility client software that requires some form of positive file locking.
READDIRPLUS (Specified via the rdirplus mount option) allows more aggressive polling of metadata from directories and can greatly improve the performance of directory listing and "ls" operations on Macs. (This is a default option on modern Linux distros)

DETAILS

How to verify your current NFS mount options:

The following command will list your current NFS mount options being used for all NFS mounts: (Run command on client)

nfsstat -m

Recommended Mount Options Per OS Type:

mount -t nfs -o rsize=65536,wsize=65536,intr,hard,tcp,rdirplus,readahead=128 your.qumulo.ip:/share /path/to/mountpoint

mount -t nfs -o rsize=65536,wsize=65536,intr,hard,tcp,locallocks,rdirplus,readahead=128 your.qumulo.ip:/share /path/to/mountpoint

mount -t nfs -o intr,hard,tcp your.qumulo.ip:/share /path/to/mountpoint

mount -t nfs -o intr,hard,tcp,local_lock=all your.qumulo.ip:/share /path/to/mountpoint

RESOLUTION

You should now know the recommended mount options when mounting a Qumulo cluster from a Mac or Linux client over NFS.

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