[tokenmasterhk]

v.4.33.31_PSdZData - Full Version - MEGA (7z Ultra high Compression 66.5GB)

Use latest version of 7z to extract.

Feel free to Rep and Thanks.

[sambir]

Which main series are touched/changed?

[luntik]

v.4.33.31_PSdZData - Full Version - MEGA (7z Ultra high Compression 66.5GB)

Use latest version of 7z to extract.

Feel free to Rep and Thanks.

I'm just curious what are the settings you use to achieve such a high compression ratio?

[tokenmasterhk]

Which main series are touched/changed?

I suggest you check with Shawn on the lite version to know the detail. I created and compressed the database for sharing only. Cheers.

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v.4.33.31_PSdZData - Full Version - MEGA (7z Ultra high Compression 66.5GB)

Use latest version of 7z to extract.

Feel free to Rep and Thanks.

I'm just curious what are the settings you use to achieve such a high compression ratio?

High compression ratio is depends on how many available ram of the PC. The higher the ram, the smaller the file size.  But my computer is not a monster, otherwise I can further reduce the file size.

[luntik]

High compression ratio is depends on how many available ram of the PC. The higher the ram, the smaller the file size.  But my computer is not a monster, otherwise I can further reduce the file size.

Yeah, but if I pick 9-Ultra it sets default values that doesn't achieve that big compression ratio as you have
So you set the values manually, right? Can you share your manual settings? Dictionary size, Word size, etc

[BusyBox]

Compr. level: Ultra
Compr. method: LZMA2
Dict. size: THE MOST you can set according RAM of the PC
Word size: 273
Solid block size: Solid
Number of CPU: NO MORE THAN 2 no matter how many the PC has
Memory usage: leave some for the system to work during compression

It will take a while, but you will be pleased, especially if PC has 32 or more GB of RAM.

[tokenmasterhk]

Compr. level: Ultra
Compr. method: LZMA2
Dict. size: THE MOST you can set according RAM of the PC
Word size: 273
Solid block size: Solid
Number of CPU: NO MORE THAN 2 no matter how many the PC has
Memory usage: leave some for the system to work during compression

It will take a while, but you will be pleased, especially if PC has 32 or more GB of RAM.

Number of CPU : Now, we can use NO MORE THAN 3.

[BusyBox]

From 7zip's help:

LZMA2 Default compression method of 7z format. LZMA2 is LZMA-based compression method. It provides better multithreading support than LZMA. But compression ratio can be worse in some cases. For best compression ratio with LZMA2 use 1 or 2 CPU threads. If you use LZMA2 with more than 2 threads, 7-zip splits data to chunks and compresses these chunks independently (2 threads per each chunk).

[tokenmasterhk]

High compression ratio is depends on how many available ram of the PC. The higher the ram, the smaller the file size.  But my computer is not a monster, otherwise I can further reduce the file size.

Yeah, but if I pick 9-Ultra it sets default values that doesn't achieve that big compression ratio as you have
So you set the values manually, right? Can you share your manual settings? Dictionary size, Word size, etc

This is the setting I used. I captured the setting from laptop for information.

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From 7zip's help:

LZMA2 Default compression method of 7z format. LZMA2 is LZMA-based compression method. It provides better multithreading support than LZMA. But compression ratio can be worse in some cases. For best compression ratio with LZMA2 use 1 or 2 CPU threads. If you use LZMA2 with more than 2 threads, 7-zip splits data to chunks and compresses these chunks independently (2 threads per each chunk).

From 7z's help, it is the recommended setting. But I used 3 CPU threads, same file size is output but faster.

I tired 4 CPU threads, the output file size is bigger.