File comaprsons for the Huge data files ( around 60G) - Need optimized and teh best way to do this

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acctmerg

acctmerg(1M)															      acctmerg(1M)

NAME

       acctmerg - merge or add total accounting files

SYNOPSIS

       [options] [file] ...

DESCRIPTION

       reads  its  standard  input  and up to nine additional files, all in the format (see acct(4)) or an ASCII version thereof.  It merges these
       inputs by adding records whose keys (normally user ID and name) are identical, and expects the inputs to be sorted on those keys.

   Options
       recognizes the following options:

	      Produce output in
		      ASCII version of

	      Input files are in
		      ASCII version of

	      Print input with no processing.

	      Produce a single record that totals all input.

	      Summarize by user
		      ID, rather than user ID and name.

	      Produce output in verbose
		      ASCII format, with more precise notation for floating point numbers.

EXAMPLES

       The following sequence is useful for making ``repairs'' to any file kept in this format:

		  edit file2 as desired ...

SEE ALSO

       acct(1M), acctcms(1M), acctcom(1M), acctcon(1M), acctprc(1M), acctsh(1M), fwtmp(1M), runacct(1M), acct(2), acct(4), utmp(4).

STANDARDS CONFORMANCE

																      acctmerg(1M)

UNIX for Advanced & Expert Users