Alternative network messaging? Post: 302723695

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Top Forums Shell Programming and Scripting Alternative network messaging? Post 302723695 by DGPickett on Tuesday 30th of October 2012 02:49:35 PM

10-30-2012

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A common dir means there is only one place to look when woken up to process input. The file name itself can contain unique information like what user sent it and what the sequence number is. A "kill -SIGUSR1 `<pid_file`" can wake up the service.

If you make it a UDP service, the server blocks on the UDP socket waiting for incoming messages, processing them one at a time. They can be queued in the socket buffer, which can be made large enough to deal with the probalbe backlog. The process reading the socket can just log the messages for further processing, so there is no liklihood of a big backlog. The service can frame the bytes in the log into different discussions. Once the log gets to a certain size, it can be rotated out for another. The log could even be a zip file for the day, with each message an archived file in appropriate interanl folder paths. You can glob through zip files as if they were directories with some tools like MS Windows Compressed folders and HXTT JDBC CSV/Text Drivers. UDP also allows for a multicast of messages back to participating users. The size is a bit restricted, not as much as twitter, 65k, but 1,440 is a more reliable size.

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LEARN ABOUT OSF1

rcinet

rcinet(8)						      System Manager's Manual							 rcinet(8)

NAME

       rcinet - Restarts, starts, or stops Internet network services on the system

SYNOPSIS

       /usr/sbin/rcinet option

OPTIONS

       You  must specify one of the following options with the rcinet command: Restarts the network on the system.  Starts the network on the sys-
       tem.  Stops the network on the system.

       You can restrict the restart, start, or stop operation to either IPv4 or IPv6 networks by specifying inet or inet6,  respectively,  as  the
       second parameter.  By default, the script assumes both IPv4 and IPv6.

DESCRIPTION

       The  rcinet  script allows system administrators to restart, start, or stop the Internet network services on the system while it is running
       in multiuser mode by using one of the options.

RESTRICTIONS

       Superuser privilege is required.

       Warn users that the system is being removed from the network.

       File systems that were not mounted using the /etc/fstab file or the automount command must be unmounted with the umount command.  You  must
       remount these file systems using the mount command after the network is started on your system.

ERRORS

       The rcinet script prints an error message to stderr if the network is not configured on the system.

FILES

       The network shell scripts are located in /sbin/init.d with symbolic links in /sbin/rc0.d and /sbin/rc3.d.

SEE ALSO

       Commands: mount(8)

       Network Administration

																	 rcinet(8)