Re: Using database to find file doublettes in my computer - Mailing list pgsql-general

Hi Ho!

--- On Tue, 11/18/08, Lothar Behrens <lothar.behrens@lollisoft.de> wrote:

> Hi,
>
> I have a problem to find as fast as possible files that are
> double or
> in other words, identical.
> Also identifying those files that are not identical.
>
> My approach was to use dir /s and an awk script to convert
> it to a sql
> script to be imported into a table.
> That done, I could start issuing queries.
>
> But how to query for files to display a 'left / right
> view' for each
> file that is on multible places ?
>
> I mean this:
>
> This File;Also here
> C:\some.txt;C:\backup\some.txt
> C:\some.txt;C:\backup1\some.txt
> C:\some.txt;C:\backup2\some.txt
>
> but have only this list:
>
> C:\some.txt
> C:\backup\some.txt
> C:\backup1\some.txt
> C:\backup2\some.txt
>
>
> The reason for this is because I am faced with the problem
> of ECAD
> projects that are copied around
> many times and I have to identify what files are here
> missing and what
> files are there.
>
> So a manual approach is as follows:
>
> 1)   Identify one file (schematic1.sch) and see, where are
> copies of
> it.
> 2)   Compare the files of both directories and make a
> desision about
> what files to use further.
> 3)   Determine conflicts, thus these files can't be
> copied together
> for a cleanup.
>
> Are there any approaches or help ?

I also have been in this kind of circumstance before, but I work under GNU/Linux as always.

1. At that time, I used `md5sum' to generate the fingerprint of all files in a given directory to be cleaned up.

2. Later, I created a simple Java program to group the names of all files that had the same fingerprint (i.e., MD5
hash).

3. I simply deleted the files with the same MD5 hash but one file with a good filename (in my case, the filename
couldn'tbe relied on to perform a comparison since it differed by small additions like date, author's name, and the
like).

4. After that, I used my brain to find related files based on the filenames (e.g., `[2006-05-23] Jeff - x.txt' should
bethe same as `Jenny - x.txt'). Of course, the Java program also helped me in grouping the files that I thought to be
related.

5. Next, I perused the related files to see whether most of the contents were the same. If yes, I took the latest one
basedon the modified time. 

> This is a very time consuming job and I am searching for
> any solution
> that helps me save time :-)

Well, I think I saved a lot of time at that time to be able to eliminate about 7,000 files out of 15,000 files in about
twoweeks. 

> I know that those problems did not arise when the projects
> are well
> structured and in a version management system. But that
> isn't here :-)

I hope you employ such a system ASAP :-)

> Thanks
>
> Lothar

Best regards,

Eus (FSF member #4445)



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