nca

 

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 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:
 
         +  You cannot initiate a connection from  a  PF_NCA  type
            socket.  The connect(3SOCKET) interface on PF_NCA will
            fail.
 
         +  System calls that are associated with  type  SO_DGRAM,
            such   as   send(),   sendto(),   sendmsg(),   recv(),
            recvfrom(), and recvmsg(), will fail.
 
         +  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, Volume 3
 
      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.
 
 
 
 
 SunOS 5.8           Last change: 28 Sep 2001                    1
 
 
 
 
 
 
 User Commands                                              nca(1)
 
 
 


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 will run.
 
      /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 function.
 


ATTRIBUTES
      See attributes(5) for descriptions of the  following  attri-
      butes:
 
      ____________________________________________________________
     |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
     |_____________________________|_____________________________|
     | Availability                | SUNWncar (32-bit)           |
     |_____________________________|_____________________________|
     |                             | SUNWncarx (64-bit)          |
     |_____________________________|_____________________________|
     | Interface Stability         | Evolving                    |
     |_____________________________|_____________________________|
 
 


SEE ALSO
      ncab2clf(1),  ncakmod(1),   close(2),   read(2),   write(2),
      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),
      sendfilev(3EXT),ncad_addr(4),   nca.if(4),  ncakmod.conf(4),
      ncalogd.conf(4), attributes(5)
 
      System Administration Guide, Volume 3
 
 
 
 
 
 
 
 
 
 
 
 SunOS 5.8           Last change: 28 Sep 2001                    2
 
 
 

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