Thanks David. As they say "Bigger than Ben-Hur"! That's a great idea. The server I have is listening on a predetermined port. I trolled through /etc/services and a netstat on the remote host to select something that looked unused.
So then if it the main phantom spawns 1-n children (presumably more phantoms?), it would also need to select 1-n ports which I suppose must also be predetermined? Or is there a call to the OS that can return an unused port? We're on AIX but the remote host is HPUX. Cheers Peter Peter Cheney Ultracs Developer t 07 3017 8837 | f 07 3002 8400 e peter.che...@firstmac.com.au w firstmac.com.au -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of David A. Green Sent: Wednesday, 5 March 2014 13:01 To: 'U2 Users List' Subject: Re: [U2] Multi-threaded phantom processing Peter, first of all let me congratulate you on this achievement. Having just finished a similar feat using UniData I understand the complexities that went into it. The system I'm current working with will be relatively low traffic. But I was pondering on the method of having a server socket that would just spawn a transfer server socket and send the socket address to the calling client. Then the client disconnects from the main server and just uses the transfer server to complete the task. Having 10 open phantoms with sockets will use up 10 licenses. David A. Green (480) 201-7953 DAG Consulting -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Peter Cheney Sent: Tuesday, March 04, 2014 6:18 PM To: U2 Users List (u2-users@listserver.u2ug.org) Subject: [U2] Multi-threaded phantom processing Hi Everyone, A project that I’m currently working on requires transmission of transactional and ancillary data from one UV site to site to another. I have the communications all set up and it is working very well via the UV socket functions with a client at one end and a server at the other. Both the client and the server both run as a UV phantom processes written in UV basic and the data being transferred (also encrypted) is more or less real time with various UV file triggers on the client end creating queue items for transmission based on the data content / transaction type. This set up is a single threaded affair and I am wondering how it will cope and what options I’ll have as the volume of data increases. Multi-threading my server process to dish out some of the load might be one possibility and I’ve seen examples in the past where the last digit of a numeric key (i.e. 0-9) is used to determine which one of 10 phantoms to call thus providing an effective distribution of the work. But even then, reading/writing processing data to a file for each child process seems to me to be the only way to achieve parent <-> child phantom communications at either end. Is there another way perhaps? It may be that I will need 2 sets of phantoms, 1 for the transactions and one for the ancillary data. Although we run UV on AIX the only other requirement is that I must be able to do it within UV Basic. Does anyone out there on the list know of a better way or any alternatives/advice so I can get a better appreciation of what else might be possible please? Many thanks in advance, Peter Peter Cheney Ultracs Developer t 07 3017 8837 | f 07 3002 8400 e peter.che...@firstmac.com.au w firstmac.com.au ------------------------------------------------------------------------------- Note: This email (inc all attachments) is for the use of the intended recipient(s) only. Privileged or confidential information may be contained in this communication. If you have received this email in error, please notify the sender immediately and then delete all copies of this message from your computer network. 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