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author | William Joye <wjoye@cfa.harvard.edu> | 2017-10-26 16:44:17 (GMT) |
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committer | William Joye <wjoye@cfa.harvard.edu> | 2017-10-26 16:44:17 (GMT) |
commit | 79d64f400391ce81b4eda73977cb40099256b348 (patch) | |
tree | 47afaed270cf59335dbaf4eb7965eac64a02a687 /xpa/doc/pod/xpamethod.pod | |
parent | 1377ae8b2142276c24d28d65865e459038984c62 (diff) | |
download | blt-79d64f400391ce81b4eda73977cb40099256b348.zip blt-79d64f400391ce81b4eda73977cb40099256b348.tar.gz blt-79d64f400391ce81b4eda73977cb40099256b348.tar.bz2 |
upgrade XPA
Diffstat (limited to 'xpa/doc/pod/xpamethod.pod')
-rw-r--r-- | xpa/doc/pod/xpamethod.pod | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/xpa/doc/pod/xpamethod.pod b/xpa/doc/pod/xpamethod.pod deleted file mode 100644 index 038ac4e..0000000 --- a/xpa/doc/pod/xpamethod.pod +++ /dev/null @@ -1,99 +0,0 @@ -=pod - -=head1 NAME - - - -B<XPAMethod: XPA Communication Methods> - - - -=head1 SYNOPSIS - - - - - -XPA supports both inet and unix (local) socket communication. - - - -=head1 DESCRIPTION - - - - - -XPA uses sockets for communication between processes. It supports -three methods of socket communication: inet, localhost, and unix. In -general, the same method should be employed for all XPA processes in a -session and the global environment variable XPA_METHOD should be used -to set up the desired method. By default, the preferred method is -"inet", which is appropriate for most users. You can set up a -different method by typing something like: - - setenv XPA_METHOD local # unix csh - XPA_METHOD=local; export XPA_METHOD # unix sh, bash, windows/cygwin - set XPA_METHOD=localhost # dos/windows - -The options for XPA_METHOD are: B<inet>, B<unix> (or -B<local>), and B<localhost>. On Unix machines, this -environment setup command can be placed in your shell init file -(.cshrc, .profile, .bashrc, etc.) On Windows platforms, it can be -placed in your AUTOEXEC.BAT file (I think!). - - -By default, B<inet> sockets are used by XPA. These are the standard -Internet sockets that are used by programs such as Netscape, -ftp. etc. Inet sockets utilize the IP address of the given machine and -a (usually random) port number to communicate between processes on the -same machine or between different machines on the Internet. (Note that -XPA has an Access Control mechanism to -prevent unauthorized access of XPA access points by other computers on -the Net). For users connected to the Internet, this usually is the -appropriate communication method. For more information about setting -up XPA communication between machines, see -Communication Between Machines. - - -In you are using XPA on a machine without an Internet connection, then -inet sockets are not appropriate. In fact, an XPA process often will -hang for many seconds while waiting for a response from the Domain -Name Service (DNS) when using inet sockets. Instead of inet sockets, -users on Unix platforms can also use B<unix> sockets (also known -as local sockets). These sockets are based on the local file system -and do not make use of the DNS. They generally are considered to be -faster than inet sockets, but they are not implemented under -Windows. Use local sockets as a first resort if you are on a Unix -machine that is not connected to the Internet. - - -Users not connected to the Internet also can use B<localhost> -sockets. These are also inet-type sockets but the IP address used for -the local machine is the B<localhost> address, 0x7F000001, instead -of the real IP of the machine. Depending on how sockets are set up for -a given platform, communication with the DNS usually is not required in -this case (though of course, XPA cannot interact with other machines). -The localhost method will generally work on both Unix and Windows -platforms, but whether the DNS is required or not is subject to -individual configurations. - - -A final warning/reminder: if your XPA-enabled server hangs at startup -time and your XPA_METHOD is B<inet>, the problem probably is -related to an incorrect Internet configuration. This can be confirmed -by using the B<unix> method or (usually) the B<localhost> -method. You can use these alternate methods if other hosts do not need -access to the XPA server. - - - -=head1 SEE ALSO - - - -See xpa(n) for a list of XPA help pages - - - -=cut |