nfs3_max_threads man page on HP-UX

Man page or keyword search:  
man Server   10987 pages
apropos Keyword Search (all sections)
Output format
HP-UX logo
[printable version]

nfs3_max_threads(5)					   nfs3_max_threads(5)

NAME
       nfs3_max_threads	 -  control  the number of kernel threads that perform
       asynchronous I/O for the NFS version 3 client

VALUES
   Failsafe
   Default
   Allowed values
   Recommended values
       A warning will be issued at runtime if the tunable is set  to  a	 value
       greater	than  256 threads since this is beyond the tested limit.  This
       is not a serious warning but just an information message for the admin‐
       istrator.

DESCRIPTION
       controls the number of kernel threads that perform asynchronous I/O for
       the NFS version 3 client. Since NFS is based on RPC and RPC  is	inher‐
       ently  synchronous, separate execution contexts are required to perform
       NFS operations that are asynchronous from the calling thread. The oper‐
       ations  which  can  be executed asynchronously are read for read-ahead,
       readdir for readdir  read-ahead,	 and  write  for  putpage  and	pageio
       requests.

   Who Is Expected to Change This Tunable?
       The  distributed	 file  system  administrator should examine this value
       depending on the network bandwidth available.

   Restrictions on Changing
       The tunable is dynamic; however, the number of threads for a file  sys‐
       tem is set when the file system is mounted. To affect a particular file
       system, unmount and mount the file system after changing	 this  parame‐
       ter.

   When Should the Value of This Tunable Be Raised?
       If  the	network	 is very high bandwidth and the client and server have
       sufficient resources, increase this value to more  effectively  utilize
       the  available  network bandwidth, the client resources, and the server
       resources.

   What Are the Side Effects of Raising the Value?
       An increase in the system  resources  and  the  possibility  that  (see
       nkthread(5)) may need to be increased. The total number of asynchronous
       threads for NFS version 2 and NFS version 3 mount points cannot	exceed
       20% of the available threads defined by NFS mounts will fail if the NFS
       mount command cannot guarantee the ability to create the maximum number
       of threads for that mount point.

   When Should the Value of This Tunable Be Lowered?
       In  a  very  low bandwidth network, decrease this value so that the NFS
       client does not overload the network.

   What Are the Side Effects of Lowering the Value?
       Decreasing this value may impact NFS performance.

WARNINGS
       All HP-UX kernel tunable parameters are release specific.  This parame‐
       ter  may	 be  removed or have its meaning changed in future releases of
       HP-UX.

       Installation of optional kernel software, from HP or other vendors, may
       cause  changes  to  tunable parameter values.  After installation, some
       tunable parameters may no longer be at the default or recommended  val‐
       ues.  For information about the effects of installation on tunable val‐
       ues, consult the documentation for the kernel software being installed.
       For  information	 about	optional  kernel  software  that  was  factory
       installed on your system, see at

AUTHOR
       was developed by Sun Microsystems, Inc.

SEE ALSO
       kctune(1M),  sam(1M),  gettune(2),   settune(2),	  nfs2_max_threads(5),
       nfs4_max_threads(5), nkthread(5).

			   Tunable Kernel Parameters	   nfs3_max_threads(5)
[top]

List of man pages available for HP-UX

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net