John, I don't know what platforms are involved in your MQ topology, but have you looked at using reference messages for doing the 'file transfer' you need to do?
About using MQ for ftp you will probably get the same answers in the future than you got in the past. ;-) Somebody I know would say 'horses for courses' and that pretty much reflects my opinion, if asked for it. IMHO, MQ has been designed to be a reliable asynchronous messaging product, not really a tool to do high-volume file transfers. Can you use it to move large files reliably? Probably yes. Should you? Hmmm.... It's a little bit like 'can you use a hammer to drive a screw into a piece of lumber?' The same dichotomous discussion will come up if you ask if it's good to use MQ as a database, using messageID and correlID as keys. Yes you can, no you shouldn't would be my answer. But there are as many opinions on that as there are stars in the sky. This is just mine. If you HAVE to use MQ to transfer bulk data (for whatever reasons, and there may be some), just make sure that you are very fastidious about separating your online (request/reply) MQ infrastructure from your batch infrastructure. This can go as far as having dedicated queue managers for batch and online to avoid anything going black while you feed your TV news... BTW, TV news going black wouldn't be all too bad these days. Cheers, Stefan
From: "Chan, John" <[EMAIL PROTECTED]> Reply-To: MQSeries List <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: Re: XML blob as MQ Message Date: Mon, 24 Feb 2003 09:36:59 -0500
Stefan,
Your comment is greatly appreciated. That's pretty much what I have in mind. I had used similar scheme on another project. I was hoping that there may be new and better ways to do it. But it sounds like the same old two messages approach is about the best in terms of speed and feeds. This is a large volume application, can't affort to convert to based64 back and forth for each message. (Want to see your TV news go black for a few seconds while the message is being converted ?, I lose my job). Since we bring up the subject, any new tricks of moving more than 100 MB message using MQ ?
By the way, what's our general feeling now a day about using MQ as ftp ?
John C
-----Original Message----- From: Stefan Sievert [mailto:[EMAIL PROTECTED] Sent: Friday, February 21, 2003 6:56 PM To: [EMAIL PROTECTED] Subject: Re: XML blob as MQ Message
In addition to what was already said: If you traverse unlike platforms (ie. from UNIX to Mainframe) and need character set conversion you will have no other option than to convert the binary content into a character representation. Otherwise either your XML tags will not be converted or your binary content will not be the same after MQ tried to convert it. Putting it at the tail end of a message won't help here since MQ converts all or nothing if you don't want to write your own data conversion exit (and I think you don't want that ;-)...). Have you thought about putting the binary content and the XML in separate messages and just reference the binary message from within the XML? It might be a bit more programming, but if message size and performance are an issue that might be an alternative worth thinking about. You could put the binary message first and put the messageId returned by MQ into your XML message. The receiving end would get the XML message first and then do a q! ualified MQGET on the binary message queue using the messageID from the XML. You will probably have to base64 encode the messageID, too, but that's only 24 Bytes instead of how many? Maybe it doesn't fit your application model, but I thought I spit it out anyways. Have a great weekend, Stefan
>From: "Chan, John" <[EMAIL PROTECTED]> >Reply-To: MQSeries List <[EMAIL PROTECTED]> >To: [EMAIL PROTECTED] >Subject: XML blob as MQ Message >Date: Fri, 21 Feb 2003 10:12:33 -0500 > >Hey guys, > >Back ground information: >1. I have a few chucks of binary data. >2. I need to put them as part of the XML message. >3. This XML message is to be sent as MQ message. > >Now here are my questions, >1. What is the fastest and easiest way to move these binary data to XML >and send as MQ Message ? 2. For speed and feed, should I just tag these >binary data on the tail end of the MQ Message ? > >Any feed back is appreciated. > >JohnC
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