Large file compare

[Geek8]

How do I write a script that does a "diff" on a 2.5 gig file and then process the record if there are no changes? I am kinda jumping into scripting and can't seem to get this to work since everytime it goes into the "diff" command, it says "memory exhausted". Is there another way?

TIA

Geek

 

[vgersh99]

from 'man diff':

-h Does a fast, half-hearted job. It works only when
changed stretches are short and well separated,
but does work on files of unlimited length.


vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[Geek8]

Thanks Vlad. I actually did try that too earlier, but got the same &quot;memory exhausted&quot; error. I was wondering if there is anything else someone can think of to check the files.

Geek

 

[vgersh99]

one thing you can do is to 'split' the files into equal chunks and compare the corresponding chunks......

vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[Ygor]

There is also the 'cmp' command.

 

[Geek8]

Thanks Guys. I guess I am going to try both methods, and see where it gets me. Vlad, what do you think the easiest method is to get the file split up?

Geek

 

[vgersh99]

'man split'

-linecount | -l linecount
Number of lines in each piece. Defaults to 1000
lines.

or 'man csplit' for 'block' splittin'

vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[Geek8]

Thanks for your help.