On Thu, 2 Jan 2014 23:21:22 +0800 (SGT)
mani kandan <[email protected]> wrote:
> Hi,
>
> We have file size of huge size 500MB, Need to Manipulate the file,
> some replacement and then write the file, I have used File::slurp and
> works for file size of 300MB (Thanks Uri) but for this huge size
> 500MB it is not processing and come out with error. I have also used
> Tie::file module same case as not processing, any guidance.
Firstly, be specific - "come out with error" doesn't help us - what is
the error?
Secondly - do you need to work on the file as a whole, or can you just
loop over it, making changes, and writing them back out? In other
words, do you *need* to hold the whole file in memory at one time?
More often than not, you don't.
If it's per-line changes, then File::Slurp::edit_file_lines should work
- for e.g.:
use File::Slurp qw(edit_file_lines);
my $filename = '/tmp/foo';
edit_file_lines(sub { s/badger/mushroom/g }, $filename);
The above would of course replace every occurrence of 'badger' with
'mushroom' in the file.
Cheers
Dave P
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