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MQSeries.net Forum Index » General Discussion » VB6 Compression Rate on Binary Files

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mlong30
PostPosted: Thu Jun 15, 2006 12:02 pm    Post subject: VB6 Compression Rate on Binary Files Reply with quote

Novice

Joined: 01 Mar 2005
Posts: 17

Does anyone know what the compression rate is on binary files using the following compression rates on sender channels?

RLE
ZLIBFAST
ZLIBHIGH

http://www.gse-nordic.org/forum/wg/nrtc/2005/S57_WebSphereMQV6OverviewwithzOSfocus.pdf

Thanks.

Matt
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jefflowrey
PostPosted: Thu Jun 15, 2006 12:47 pm    Post subject: Reply with quote

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981

MQ has no notion whatsoever of a "binary file".

If the channel compression algorithms do anything special or different if the MQMD.Format is MQFMT_STRING, I would be very very surprised.

Have you looked at the performance report? I suspect it has some good data in this area.

Have you considered running your own tests?
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I am *not* the model of the modern major general.
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mlong30
PostPosted: Fri Jun 16, 2006 8:00 am    Post subject: Reply with quote

Novice

Joined: 01 Mar 2005
Posts: 17

jefflowrey wrote:
MQ has no notion whatsoever of a "binary file".

If the channel compression algorithms do anything special or different if the MQMD.Format is MQFMT_STRING, I would be very very surprised.

Have you looked at the performance report? I suspect it has some good data in this area.

Have you considered running your own tests?


I'm currently using the trial version of MQ 6. Can you tell me where the performance reports are located?

Thanks.
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JT
PostPosted: Fri Jun 16, 2006 11:05 am    Post subject: Reply with quote

Padawan

Joined: 27 Mar 2003
Posts: 1564
Location: Hartford, CT.

http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27007150&loc=en_US&cs=utf-8&lang=en
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JLRowe
PostPosted: Wed Jun 21, 2006 3:54 pm    Post subject: Reply with quote

Yatiri

Joined: 25 May 2002
Posts: 664
Location: South East London

Watch out for a new compression parameter in v6.1 called QUANTUM, apparently it can compress any message to 0 bytes.
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wschutz
PostPosted: Thu Jun 22, 2006 1:32 am    Post subject: Reply with quote

Jedi Knight

Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)

As in many cases, the answer is "it depends", althought I suspect RLE might actually make the payload bigger:

http://www.prepressure.com/techno/compressionrle.htm

and zlib might be useful:
http://www.zlib.net/

but, the best way is to test with your sample payloads and something like ethereal.
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