Peter is the only point of the "parent child communications" to address points like
1 I'm busy go away; OR 2 I'm available to work If so, you could simply use a lock-semaphore to address both of those issues.\ -----Original Message----- From: Horacio Pellegrino <pellegrin...@gmail.com> To: U2 Users List <u2-users@listserver.u2ug.org> Sent: Wed, Mar 5, 2014 4:19 pm Subject: Re: [U2] Multi-threaded phantom processing Why don't you have one port listening for requests, and as soon as they come in, you create a new phantom to answer that request ( liberating the listener immediately for the next request ), then when the phantom finishes it could log off. Might be you want to keep a "pool" of phantoms alive for a while, on the assumption they might be reused. That way you are sill using one license per request, but you have the benefit of "pooling"... You can always set min-max limit for those phantom-workers. Horacio Pellegrino On Tue, Mar 4, 2014 at 11:30 PM, Peter Cheney <peter.che...@firstmac.com.au>wrote: > 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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