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


     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 will

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

        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.

     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.


           Lists configuration parameters for NCA.

           Lists configuration parameters for NCA logging.

           Lists the physical interfaces on which NCA will run.

           Lists  all  physical  interfaces  configured  on   the

           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.


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

    |       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(3DOOR),
     door_call(3DOOR),  door_create(3DOOR),  getsockopt(3SOCKET),
     listen(3SOCKET),   setsockopt(3SOCKET),   shutdown(3SOCKET),
     socket(3HEAD),   socket(3SOCKET),  ncad_addr(4),  nca.if(4),
     ncakmod.conf(4), ncalogd.conf(4), attributes(5)

     System Administration Guide: IP Services

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