Hi,
Have you considered the use of pipes for inter-process communication.
Also, on UNIX/Linux, semaphores provide a powerful way to
synchronise/trigger processes. It's also possible to use an http server
like Apache to achieve very similar functionality as one would with
sockets, i.e if you have control over the application that is
establishing a connection to a socket, modify it to communicate via
http and tools like FastCGI to maintain persistent processes.
If you'd like to discuss this off-line please feel free to email me directly
Regards
Ian Stuart
Nick Cipollina wrote:
Hello All,
We are currently stuck at version 10.1 of Universe because IBM has
changed what causes a UV license to be consumed. In versions 10.1 on
older versions, phantom processes do not require a separate universe
license. As of version 10.2, this is no longer the case. Phantom
processes will require a user license in order to run. This is a
problem for us, because we currently run thousands of phantom processes
to process transactions, real-time. Now you may say, well it is only
fair that you should have to pay for each of these processes because
they are essentially the same thing as a user session. We are
interacting with the data through these phantoms. The reason we have to
run so many processes is because of how Universe has implemented the
socket API. Here is how I'm hoping someone on the list might be able to
help me, or correct me on my understanding of how the socket API works.
If my understanding is correct, the universe socket API does not allow
the listener to pass of the socket connection to another process for
processing and response. The process that is listening on a port and
accepts the connection, is also the process that must answer. This is
not typically how a socket service works. Typically, you have a process
listening on a port, and when you receive a connection, the connection
is passed off to another process for processing and response. So,
unless my understanding of how this works is incorrect, we have to run
so many phantoms because the Universe socket API is not set up to handle
multiple connections on a single port. We actually have an F5 load
balancer that accepts the connections on a single port and passes it off
to one of the many phantoms that is listening on a unique port. I have
two questions:
1. Is there anyone out there that is in the same boat we are? Is anyone
else stuck on version 10.1 or older because they cannot afford to
upgrade to 10.2 because of the licensing requirements?
2. Is my understanding of how the universe socket API works correct? If
so, has anyone come up with a way around this limitation? Keep in mind,
we currently process 95% of our transactions in 1/10th of a second.
Thanks,
Nick Cipollina
MCTS, MCP
ACS Heritage, Inc.
2810 North Parham Road, Suite 210
Richmond, VA 23294
(804) 965-8294
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