Comparison by content fails on large files

Blight · Post by *Blight » 2012-01-19, 21:06 UTC

Hi,
I did a comparison by content of a 153gb truecrypt file across two hard drives.

It resulted in an error message saying there's not enough memory.

karlchen · Post by *karlchen » 2012-01-19, 21:13 UTC

Hello, Blight.

Comparing files larger than 2 GB might work correctly in Total Commander 8.0 beta 64-bit.

Total Commander 8.0ß16 history.txt wrote:10.11.11 Added: (experimental) Compare by content: support files >2 GB (64)

Kind regards,
Karl

Flint · Post by *Flint » 2012-01-20, 11:14 UTC

It will work only if there is enough memory installed. I suppose there are no 306Gb of RAM on your machine. Comparing in TC works by mapping files into memory, so for large files it can only tell you whether the files are identical or different, but not show them side-by-side.

Post by *ghisler(Author) » 2012-01-20, 13:40 UTC

Actually it should work also when the file is larger! TC only maps the file into memory, Windows will swap it in and out during the comparison. I could compare two 6 GB files here although I only have 4 GB of RAM.

Blight · Post by *Blight » 2012-01-25, 22:28 UTC

Maybe a pop-up saying it's impossible?

I had to write my own tool in the end :-/