06-29-2011
Quote:
Originally Posted by
mark54g
Yes, whenever a large file transfer is going on. This is, I believe, due to the need for write locking to quiesce. Switching to UDP only mode in NFSv3 made it a little better, but I am investigating moving to iSCSI.
as for i know nfsv3 default already uses udp.maybe it is tcp in redhat.
at the now,between clients and server of network line is at least giga/10g and local and clear? is it?
and (>20 seconds) is big time so you must have really big files
for this maybe you can modify rsize/wsize settings on clients and remount and lets see what happened about times.
your power helper is below..
5.*Optimizing NFS Performance
good lucks
regards
ygemici
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LEARN ABOUT OSX
mount.nfs
MOUNT.NFS(8) System Manager's Manual MOUNT.NFS(8)
NAME
mount.nfs, mount.nfs4 - mount a Network File System
SYNOPSIS
mount.nfs remotetarget dir [-rvVwfnsh ] [-o options]
DESCRIPTION
mount.nfs is a part of nfs(5) utilities package, which provides NFS client functionality.
mount.nfs is meant to be used by the mount(8) command for mounting NFS shares. This subcommand, however, can also be used as a standalone
command with limited functionality.
remotetarget is a server share usually in the form of servername:/path/to/share. dir is the directory on which the file system is to be
mounted.
Under Linux 2.6.32 and later kernel versions, mount.nfs can mount all NFS file system versions. Under earlier Linux kernel versions,
mount.nfs4 must be used for mounting NFSv4 file systems while mount.nfs must be used for NFSv3 and v2.
OPTIONS
-r Mount file system readonly.
-v Be verbose.
-V Print version.
-w Mount file system read-write.
-f Fake mount. Don't actually call the mount system call.
-n Do not update /etc/mtab. By default, an entry is created in /etc/mtab for every mounted file system. Use this option to skip making
an entry.
-s Tolerate sloppy mount options rather than fail.
-h Print help message.
nfsoptions
Refer to nfs(5) or mount(8) manual pages.
NOTE
For further information please refer nfs(5) and mount(8) manual pages.
FILES
/etc/fstab file system table
/etc/mtab table of mounted file systems
SEE ALSO
nfs(5), mount(8),
AUTHOR
Amit Gud <agud@redhat.com>
5 Jun 2006 MOUNT.NFS(8)