Do you need to count the number of different IPs, or also how often each of these IPs occured?

If it's the former, you can create a bit vector, each bit corresponding to one IP address. An IPv4 address has 4 bytes or 32 bites, so you need 2**32/8 = 0.5G bytes. See vec for a function that manipulates bit vectors in Perl.

You can also use out-of-memory storage such as GDBM_File, but that will probably slow down your program.

Perl 6 - links to (nearly) everything that is Perl 6.

In reply to Re: Working with large amount of data by moritz
in thread Working with large amount of data by just1fix

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