Manual Pages for UNIX Operating System command usage for man snca

User Commands                                              nca(1)



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

DESCRIPTION
     The Solaris Network Cache and Accelerator ("NCA") is a  ker-
     nel  module  designed to provide improved web server perfor-
     mance. 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  connect(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 setsockopt(3SOCKET).


     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 undesir-
     able behavior.



SunOS 5.11          Last change: 22 Feb 2005                    1






User Commands                                              nca(1)



     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.

FILES
     /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  con-
                              figured 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
                              function.


ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:




















SunOS 5.11          Last change: 22 Feb 2005                    2






User Commands                                              nca(1)



     ____________________________________________________________
   |        ATTRIBUTE TYPE       |        ATTRIBUTE VALUE      |
   | ____________________________|_____________________________|_
   |  Availability               |  system/network/http-cache- |
   |                             |  accelerator (32-bit)       |
   |_____________________________|_____________________________|
   |                             | SUNWncarx (64-bit)          |
   |_____________________________|_____________________________|
   | Interface Stability         | Committed                   |
   |_____________________________|_____________________________|


SEE ALSO
     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),    getsockopt(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          Last change: 22 Feb 2005                    3