SIP User's Manual 444 Document #: LTRT-83310
Mediant 600 & Mediant 1000
20.1.2.3.8.1 Solaris-Based NFS Servers
If you are using a Solaris™-based NFS server, then the following nfsd configuration
modification is recommended, especially if you are planning to support voice recording:
Edit the file /etc/default/nfs and set the value of NFSD_SERVERS to N*2, where N is
the maximum number of record and play sessions that you expect to have in progress
at any one time.
The NFSD_SERVERS parameter controls the number of worker threads that the NFS
daemon uses to satisfy requests. When a request arrives, a check is made for an idle
worker thread. If an idle worker thread is available, then the request is passed to it. If
an idle worker thread is unavailable, then a new one is created and the request is
passed to it. If the limit in worker threads is reached, the request is queued until one of
the existing worker threads is available. Queuing of NFS requests from a real-time
application such as the media server should be avoided. Therefore, the
NFSD_SERVERS parameter should be used to ensure there is an adequate number
of worker threads.
The default value for NFSD_SERVERS is 1. Typically, the /etc/default/nfs file contains
NFSD_SERVERS set to 16.
To determine how many worker threads are running on the NFS server, invoke the
following command:
pstack `pgrep nfsd` | grep nfssys | wc -l
An idle NFS daemon process displays 1 nfsd thread.
Directories are shared by placing an entry in the /etc/dfs/dfstab file. See the share(1M)
and share_nfs(1M) main pages for information on the format of entries in the dfstab
file. Note that read-write (rw) is the default behavior. If you are planning to record to
the file system, ensure that the directory is shared as rw. Also ensure that the
recording directory has 777 (rwxrwxrwx) permissions.
Below is an example /etc/dfs/dfstab file. Note that /audio1 is shared as read-only, and
/audio2 is shared as read-write.
> cat /etc/dfs/dfstab
share -F nfs -o ro /audio1
Ensure that the /etc/nfssec.conf file is configured so that "sys" is the default security
mode. You should see the following:
> cat /etc/nfssec.conf
none 0 - - - # AUTH_NONE
sys 1 - - - # AUTH_SYS
dh 3 - - - # AUTH_DH
default 1 - - - # default is AUTH_SYS
If the systems administrator wishes to use a default other than AUTH_SYS in the
nfssec.conf file, then you should add "sec=sys" to each line in the dfstab file that is to
be shared with an AudioCodes system. For example:
> cat /etc/dfs/dfstab
share -F nfs -o sec=sys,ro /audio1
share -F nfs -o sec=sys /audio2
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