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GLIMPSESERVER(l)					      GLIMPSESERVER(l)

NAME
       glimpseserver 4.1 - a server version of the glimpse searching package.

OVERVIEW
       Glimpse	is  an	indexing  and  query  system that allows you to search
       through all your files very quickly.  The use  of  glimpse  in  servers
       that  handle  frequent  queries	is  growing,  which  is	 why  we wrote
       glimpseserver to make searches more efficient.  Glimpseserver starts  a
       process	that  listens  to queries, runs glimpse, and sends the answers
       back.  The main advantage is that the index is read only once into mem‐
       ory  saving  a  lot  of	IO.   Glimpse  communicates with glimpseserver
       through a given port number.  See the warning about security below.

SYNOPSIS
       glimpseserver [ -H dir -K port -J host.	]

DESCRIPTION
       -H dir specifies the directory of the index.  Similar to the -H	option
	      of  glimpse.  The default directory is the value of the environ‐
	      ment variable $HOME if that is set, otherwise it is the  current
	      directory.

       -K port
	      this  is the TCP port for communication: glimpseserver waits for
	      requests on this port and clients that want to search using  the
	      index in specified by the -H option must use this port (by call‐
	      ing glimpse -K).	The defaults port number is 2001.

       -J host
	      the  name	 of  the  host.	  The  default	is  the	  host	 where
	      glimpseserver is running, which is probably the only possibility
	      anyway.

RESTARTING
       If a new index is created by running glimpseindex every night, restart‐
       ing  a  new  glimpseserver is now easier: simply send a SIGUSR2 (signal
       #31 - i.e., "kill -31 pid") to glimpseserver; it then re-reads the  NEW
       index  and  is  ready to serve requests again.  (A SIGHUP, i.e., signal
       #1, can also be sent instead of SIGUSR2 to make the  glimpseserver  re-
       read  the new index.)  The recommended way to do a fresh indexing while
       the server is still running is:
       send SIGSTOP to glimpseserver
       do the indexing
       send SIGUSR2 to glimpseserver
       send SIGCONT to glimpseserver (to ask it to continue after stop)
       The SIGSTOP is  required	 so  that  glimpseserver  doesn't  answer  any
       queries while the indexing is going on.

WARNING
       Glimpseserver  should be used only for public servers.  Any client that
       knows the port number can get any information available	in  the	 index
       (and  port  numbers  are	 not  that  secret).  When glimpse is run as a
       standalone application it requires read permission of the index and all
       the  files.   When  glimpse  uses  the  -C  option  to communicate with
       glimpseserver, glimpse (the client) does not  require  any  permission,
       because	glimpseserver does all the searching.  So, we recommend not to
       run glimpseserver on any data that should be protected.	 Glimpseserver
       is meant to be used for public data.

SEE ALSO
       glimpse(1), glimpseindex(1),

BUGS
       Please send bug reports or comments to glimpse@cs.arizona.edu.

AUTHORS
       Udi  Manber and Burra Gopal, Department of Computer Science, University
       of Arizona, and Sun Wu, the National  Chung-Cheng  University,  Taiwan.
       (Email:	glimpse@cs.arizona.edu)

			       October 13, 1997		      GLIMPSESERVER(l)
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