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anyone tryed kgb archiver yet?1GB compressed to a 10MB file?


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ok so anyone tried KGB archiver yet ?

from wot ive heard u can even get it to compress about 1GB of data to a 10MB file however the compression/decompression time time would be huge , still seems sweet for a backup ...

its free and opensource and source is available to compile on any platform ....

here's the sourceforge link : ...

http://kgbarchiver.sourceforge.net/index.php

Yeah it is cool in some cases...

if you try to compress a large amount of data (around 400mb) into a

smallest possible compression with KGB... it takes too much time to

decompress the archive.

Like what i've experienced.. i downloaded a 400mb compressed file into

1mb used with KGB archiver and when i tried to decompress the archive,

it says "estimated time left: 400 HRS". :o

But i think if the archive is compressed about 50% to 25% from its

original size, probably it will just work fine.

KGB Archiver is the compression tool with unbelievable high compression rate. It surpasses even such efficient compression tool like 7zip and UHARC in terms of the abilities.

KGB Archiver is an application created to allow you to compress and decompress files.

Unfortunately although its powerful compression rate, it has high hardware requirements (I recommend processor with 1,5GHz clock and 256MB of RAM as an essential minimum).

One of the advantages of KGB Archiver is also AES-256 encryption which is used to encrypt the archives. This is one of the strongest encryptions known for human.

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I am going to have a hard time beleiving there is a 1% size compression algorithm out there...

I mean from my understanding of compression, and such, unless your compressing a 7 mile long x 2 mile wide all one color BMP; such results are unacheivable... also what about error correction?

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I back up everything hourly to /dev/null and so far haven't run out of diskspace. I have NO idea how the machine compresses all that data, but so far so good I guess.

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I am going to have a hard time beleiving there is a 1% size compression algorithm out there...

I mean from my understanding of compression, and such, unless your compressing a 7 mile long x 2 mile wide all one color BMP; such results are unacheivable... also what about error correction?

as they do with other compressors (like zip and winrar ,7zip these extremes are probably done cos they only used textfiles to compress .... but still damn)

here's a comparison sheet :

test2.jpg

here's a list of tests on compressing other formats :

http://kgbarchiver.sourceforge.net/en/tests.php

i especially find the results of the mp3's and applications impressive (seeing that a mp3 file is allready a compressed format (isn't it ?)

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Looking at the actual results the difference is only marginal/non existent. If you are sending files to anyone they loose the bytes the extra compression by having to download the application too.

I will try it just because I don't trust them when they give results without providing the sample data. If you are smart enough to figure out a good compression algorithm you can most likely generate data that will suit your algorithm better than others too.

Edit:

So I set my computer to do some compressions while I was away on the most random set of files I have in one place, my web root. It's a mixture of text, images, audio (compressed and not), video and some random binary files.

I did zip and 7z on normal and their highest default settings and those were done in a couple of minutes. Kgb on normal took a bit longer and created a file similar in size to 7z on normal (approx. 100k larger than 7z). On anything higher kgb becomes completely unusable since the time requirement increases exponentially. Medium (the step above normal) would take a couple of hours and maximum would be still be working a couple of months into next year.

To summarize it is completely worthless unless you own a supercomputer, incredibly slow and gets a worse result than 7z when used realistically.

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ok i tested the compression

Content: 12 mp3

Software: Winrar, kgb archive

Uncompressed: 69.2

kgb archive: 68.2 normal compression 16min

Winrar: 68.7 normal compression 2min

kgb compression ratio: 98.5%

winrar compression ratio: 99.3&

Final Thoughts:

Sure i saved 500KB but the 14min time difference is too much. Their claim for mp3 compression is 95.5% which is a little better than the results i got. I choose mp3 because it was the only thing i had redily avaliable after testing it i got to the conclusion kgb isnt as great as it seems. I saved 500KB but at the cost of 8times slower than winrar not worth it.

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