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OpenSolaris 2009.06 - man page for nca (opensolaris section 1)

nca(1)					  User Commands 				   nca(1)

       nca, snca - the Solaris Network Cache and Accelerator (NCA)

       The  Solaris  Network Cache and Accelerator ("NCA") is a kernel module designed to provide
       improved web server performance. The kernel module, ncakmod, services  HTTP  requests.  To
       improve the performance of servicing HTTP requests, the NCA kernel module maintains an in-
       kernel cache of web pages. If the NCA kernel module cannot service the request itself,  it
       passes  the  request  to the http daemon (httpd). It uses either a sockets interface, with
       family type designated PF_NCA, or a private Solaris doors interface that is based  on  the
       Solaris doors RPC mechanism, to pass the request.

       To use the sockets interface, the web server must open a socket of family type PF_NCA. The
       PF_NCA family supports only SOCK_STREAM and protocol 0, otherwise an error occurs.

       The following features are not presently supported:

	   o	  You  cannot  initiate  a  connection	from  a  PF_NCA  type  socket.	The  con-
		  nect(3SOCKET) interface on PF_NCA fails.

	   o	  System  calls that are associated with type SO_DGRAM, such as send(), sendto(),
		  sendmsg(), recv(), recvfrom(), and recvmsg(), fails.

	   o	  You cannot set TCP or IP options on  a  PF_NCA  type	socket	through  setsock-

       The  NCA  cache	consistency is maintained by honoring HTTP headers that deal with a given
       content type and expiration date, much the same way as a proxy cache.

       For configuration information, see System Administration Guide: IP Services

       When native PF_NCA socket support does not exist  in  the  web  server,	the  ncad_addr(4)
       interface must be used to provide NCA support in that web server.

       NCA  is	intended to be run on a dedicated web server. Running other large processes while
       running NCA might cause undesirable behavior.

       NCA supports the logging of in-kernel cache hits. See ncalogd.conf(4). NCA stores logs  in
       a  binary  format.  Use the ncab2clf(1) utility to convert the log from a binary format to
       the Common Log File format.

       /etc/nca/ncakmod.conf	Lists configuration parameters for NCA.

       /etc/nca/ncalogd.conf	Lists configuration parameters for NCA logging.

       /etc/nca/nca.if		Lists the physical interfaces on which NCA runs.

       /etc/nca/ncaport.conf	ncaport configuration file

       /etc/hostname.{}{0-9}	Lists all physical interfaces configured on the server.

       /etc/hosts		Lists all host names associated with the server. Entries in  this
				file  must match with entries in /etc/hostname.{}{0-9} for NCA to

       See attributes(5) for descriptions of the following attributes:

       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |Availability		     |SUNWncar (32-bit) 	   |
       |			     |SUNWncarx (64-bit)	   |
       |Interface Stability	     |Evolving			   |

       ncab2clf(1), ncakmod(1), close(2), read(2),  write(2),  sendfilev(3EXT),  accept(3SOCKET),
       bind(3SOCKET)connect(3SOCKET),  door_bind(3C),  door_call(3C),  door_create(3C),  getsock-
       opt(3SOCKET), listen(3SOCKET),  setsockopt(3SOCKET),  shutdown(3SOCKET),  socket.h(3HEAD),
       socket(3SOCKET),     ncad_addr(4),     nca.if(4),     ncakmod.conf(4),	 ncaport.conf(4),
       ncalogd.conf(4), attributes(5)

       System Administration Guide: IP Services

SunOS 5.11				   22 Feb 2005					   nca(1)

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