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Comparison by content fails on large files

 
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Blight
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Joined: 22 Mar 2003
Posts: 55

PostPosted: Thu Jan 19, 2012 3:06 pm    Post subject: Comparison by content fails on large files Reply with quote

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.
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Yaron Gur
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karlchen
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Joined: 06 Feb 2003
Posts: 4503
Location: Germany

PostPosted: Thu Jan 19, 2012 3:13 pm    Post subject: Reply with quote

Hello, Blight.

Comparing files larger than 2 GB might work correctly in Total Commander 8.0 beta 64-bit.
Total Commander 8.0▀16 history.txt wrote:
10.11.11 Added: (experimental) Compare by content: support files >2 GB (64)

Kind regards,
Karl
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Flint
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PostPosted: Fri Jan 20, 2012 5:14 am    Post subject: Reply with quote

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.
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ghisler(Author)
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PostPosted: Fri Jan 20, 2012 7:40 am    Post subject: Reply with quote

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.
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Blight
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PostPosted: Wed Jan 25, 2012 4:28 pm    Post subject: Reply with quote

Maybe a pop-up saying it's impossible?

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