Niall O Broin wondered:
> This REALLY bugs me - I remember doing an informal survey on sun-managers
> years ago and real world compression ratios to Exabytes or DAT were about
> 1.4-1.6:1 and I seriously doubt that there's been some new magic streaming
> compression algorithm found.
I don't think compression has got better, but I would not be surprised if
data has become more redundant. Database dumps, word processor documents,
html pages and source code should all show good compression ratios.
Of course, if one were backing up MP3 libraries or graphics archives the
compression ratio would be horrible. And if you gzip your data before
backing it up then you would be lucky to get 1.4:1...
Personally, I always ignore claimed compression ratios because they are
determined by marketing folk, not technical people.
- Matthew
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