01-21-2011
Max. number of NFS mounts
Hi,
I was wondering, whether there is a limit regarding the max number of nfs mounts in
Oracle Solaris 10 (newest update).
The data center plans to migrate from a fibre channel based storage environment (hitachi) to a nfs based storage environment (netapp). Regarding the Solaris 10 database servers this means, according netapp's best practice documents , that the setup for each oracle database will include at least 4 nfs mounts (data, logfile, binaries,..) from the netapp storage system. As there is a database server (M4000) with 15 oracle databases, the Solaris 10/M4000 will have to handle at least 60 concurrent nfs mounts (as a "nfs client").
Has anyone any experiences with so many concurrent nfs mounts on a single Solaris Sparc system in terms off reliability and stability of the nfs mounts / storage connection ?
Thanks.
Steven
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MOUNTD(8) BSD System Manager's Manual MOUNTD(8)
NAME
mountd -- service remote NFS mount requests
SYNOPSIS
Obsolete. See nfsd(8).
DESCRIPTION
The mountd daemon was formerly the server for NFS mount requests from NFS clients. This functionality has been moved into the NFS server
daemon nfsd(8).
Please refer to nfsd(8) for NFS server documenation.
The following is a list of former mountd options that are now available as nfsd(8) options:
mountd option nfsd option Description
-n -N allow non-root mounts
-r -R allow regular file mounts
exportsfile -F exportsfile alternate exports file
However, such configuration options are normally specified via nfs.conf(5).
When the NFS server is started, it loads the export host addresses and options into the kernel using the nfssvc(2) system call. After chang-
ing the list of exports (either directly or indirectly via a change in netgroup membership), the administrator should send a hangup signal to
the nfsd daemon to get it to reload the export information:
kill -s HUP `cat /var/run/nfsd.pid`
For backwards compatibility, the following should also work:
kill -s HUP `cat /var/run/mountd.pid`
Any errors encountered while processing the export entries will be logged via syslog(3).
FILES
/etc/exports the list of exported filesystems
/var/run/mountd.pid the pid of the currently running mountd
/var/run/mountdtab the current list of outstanding mounts served
/var/run/mountdexptab
information about exported file systems and directories (UUIDs, handles, ...)
SEE ALSO
nfsd(8), exports(5), nfs.conf(5), nfsstat(1), portmap(8), showmount(8)
HISTORY
The mountd utility first appeared in 4.4BSD. It's functionality was merged into nfsd(8) in Darwin 9.
BSD
November 10, 2006 BSD