Thank you very much Edison007.
Quote:
Originally Posted by Edison007
-mtb [2..512] - sets the block size in MB. When -mt1 -mtt0 also plays a role, but minimal. And more does not mean better. Usually, for -mtt0, the optimal value is about 32-64MB, so the size of the dictionary should be more than 2 times larger. For mtt1 mode, the dictionary size must be no more than the block size;
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I think the problem was this. I was using default value for block size and was using value greater than 512 for dictionary using mtt1.
PS: I noticed that if you compress as small as 300MB the value set for dictionary in console output during compression is smaller than if you compress as much as 30GB. Dictionary appears to be input size dependent.
I will run some tests and see the results.
Thanks!