I have been doing a lot of a testing of various messages types (i.e. Fixed-width, CSV, XML, JSON, PDF, PNG, JPG, etc.). I’ll post the results in the next blog posting. I have decided to drop support for LZ1 compression algorithm from MQ Message Compression (MQMC) for the following reasons:
- LZ1 has the slowest compression speed, by a factor of 4, compared to the other 7 compression algorithms included in MQMC
- LZ1 is not cross-platform aware. i.e. It does not understand Big Endian and Little Endian integer conversion.
Nobody will choose a super slow compression algorithm with average compression results. That is why I decided to drop support for it.
Therefore, MQ Message Compression will support the following 7 lossless compression algorithms going forward:
- LZ4 – It is promoted as extremely fast (which it is).
- LZW – I used Michael Dipperstein’s implementation of Lempel-Ziv-Welch.
- LZMA Fast – I used the LZMA SDK from 7-Zip with a Level set to 4.
- LZMA Best – I used the LZMA SDK from 7-Zip with a Level set to 5.
- RLE – Run Length Encoding – I wrote the code from pseudo code – very basic stuff.
- ZLIB Fast – I used Rich Geldreich’s miniz implementation of ZLIB with a Level of Z_BEST_SPEED.
- ZLIB Best – I used Rich Geldreich’s miniz implementation of ZLIB with a Level of Z_BEST_COMPRESSION.
I plan on building MQMC for AIX, HP-UX, IBM i (OS/400), Linux (x86, x86_64, POWER & zSystem), Solaris (SPARC & x86_64) and Windows. MQMC will support IBM MQ v7.1, v7.5, v8.0, v9.0, v9.1 and v9.2.
Beta testing MQ Message Compression is absolutely free including support (no strings attached).
If you interesting in trying it out, please send an email to support@capitalware.com to request a trial of MQ Message Compression.
Regards,
Roger Lacroix
Capitalware Inc.
