    Compressed Repository readme
    ============================

    Filename:  readme.compressed_repository
    Authors:   Karl Schopmeyer, Jim Wunderlich, 
    Date:      28 Feb. 2005	

      PEP 214 added the capability added the capability to utilize 
      compression algorithms on the repository. The compressed repository 
      is approximately 70% smaller than a regular xml text based repository.
      This allows significant disk space savings a also results in shorter
      file load times.
     
      The compression logic is installed as a conditionally compiled option. 
      To enable the compressed repository functionality:
  	1. Install zlib
  	2. define PEGASUS_ENABLE_COMPRESSED_REPOSITORY=true in the environment
        3. build Pegasus.
  
   LIBZ INSTALLATION:
   ------------------
  
   libz is used in the compression logic so it must be installed in
    a standard location prior to enabling the compressed repository
    functionality.
  
   LIBZ web pages are:
  
        http://www.sourceforge.net
        http://gnuwin32.sourceforge.net/packages/zlib.htm
        http://www.winimage.com/zLibDll/
        http://www.gzip.org/zlib/
  
   LIBZ INSTALLATION ON WINDOWS PLATFORMS:
   -------------------------------------- 
        The standard libz install is:
              "Program Files"\GnuWin32\include
  			zlib.h and zconf.h
              "Program Files"\GnuWin32\lib
  			libz.a
              "Program Files"\GnuWin32\bin
  			zlib1.dll
  
   These are the locations used by the windows libz package
   available on www.sourceforge.net specifically at
   http://gnuwin32.sourceforge.net/packages/zlib.htm.
  
   The make file specifies these GnuWin32 directories (include and lib) 
   for the compilation of the CIMRepository. The CIMserver.exe will use
   the zlib1.dll and expects to find it in one of the search path directories. 

   The directory containing the zlib1.dll library must be in the search path.
   You may include the Gnuwin/bin directory in your search path or
   alternatively you may move zlib1.dll to another directory that is already
   in your search path.
    
  
   LIBZ INSTALLATION ON UNIX PLATFORMS:
   ------------------------------------
   Install zlib.h & zconf.h in the standard system includes directory.
   Install libz.a in the standard systems library directory.
   Install zlib1.dll in the standard executables directory
   
   
   COMPILATION:
   ------------
  
      To enable the compressed repository functionality 
      define PEGASUS_ENABLE_COMPRESSED_REPOSITORY in the environment,
      prior to building the tree. Then build the whole source tree.
  
   set PEGASUS_ENABLE_COMPRESSED_REPOSITORY=on
   export PEGASUS_ENABLE_COMPRESSED_REPOSITORY=on
   etc. 
  
   USAGE:
   -----
  
   With the compression code enabled and compiled:
      - All repositories built will be in the compressed format by default.
      - all repository formats can be read.
      - all repository formats can be written.
         To build a non compressed repository with compression enabled:
         set PEGASUS_COMPRESS_REPSOITORY to "build_non_compresed".
         This is used by the CompareXmlCompressed repository test. 
   
    export PEGASUS_ENABLE_COMPRESSED_REPOSITORY=on
    export PEGASUS_ENABLE_COMPRESSED_REPOSITORY=build_non_compressed
    set PEGASUS_ENABLE_COMPRESSED_REPOSITORY=on
    set PEGASUS_ENABLE_COMPRESSED_REPOSITORY=build_non_compressed
   
   TESTERS NOTE:
   ------------
  
   If PEGASUS_ENABLE_COMPRESSED_REPOSITORY is defined then the CompareXmlCompressed
   test is run. If it is not defined then the CompareXmlCompressed is not run.
  
   However if you have the zlibs installed and want to normally test
   everything with a regular repository but want to run the 
   CompareXmlCompressed test then define PEGASUS_ENABLE_COMPRESSED_REPOSITORY_TEST. 
   This will cause the test to run, it will recompile the CIMRepository for 
   compression, run the test and then recompile CIMRepository for
   non-compression.
    
