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.\" Manpage for nfsrahead.
.nh
.ad l
.TH man 5 "08 Mar 2022" "1.0" "nfsrahead man page"
.SH NAME
nfsrahead \- Configure the readahead for NFS mounts
.SH SYNOPSIS
nfsrahead [-F] [-d] <device>
.SH DESCRIPTION
\fInfsrahead\fR is a tool intended to be used with udev to set the \fIread_ahead_kb\fR parameter of NFS mounts, according to the configuration file (see \fICONFIGURATION\fR). \fIdevice\fR is the device number for the NFS backing device as provided by the kernel.
.SH OPTIONS
.TP
.B -F
Send messages to
.I stderr
instead of
.I syslog
.TP
.B -d
Increase the debugging level.
.SH CONFIGURATION
.I nfsrahead
is configured in
.IR /etc/nfs.conf ,
in the section titled
.IR nfsrahead .
It accepts the following configurations.
.TP
.B nfs=<value>
The readahead value applied to NFSv3 mounts.
.TP
.B nfs4=<value>
The readahead value applied to NFSv4 mounts.
.TP
.B default=<value>
The default configuration when none of the configurations above is set.
.SH EXAMPLE CONFIGURATION
[nfsrahead]
.br
nfs=15000 # readahead of 15000 for NFSv3 mounts
.br
nfs4=16000 # readahead of 16000 for NFSv4 mounts
.br
default=128 # default is 128
.SH SEE ALSO
.BR mount.nfs (8),
.BR nfs (5),
.BR nfs.conf (5),
.BR udev (7),
.BR bcc-readahead (8)
.SH BUGS
No known bugs.
.SH AUTHOR
Thiago Rafael Becker <trbecker@gmail.com>
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