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Full Discussion: Unique values from a Terabyte File
Top Forums Shell Programming and Scripting Unique values from a Terabyte File Post 302246851 by matrixmadhan on Tuesday 14th of October 2008 02:17:14 PM
Old 10-14-2008
Not really.

Running again a plain sort on a tera-byte problem wont scale up properly and that is not needed as well.

These type of problems for which computational complexity increases with more number of records to be processed can be handled by the map-reduce problem. This should probably be done by splitting the files into 'n' chunks and collaborating each of the processed chunks.
 

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LEARN ABOUT MOJAVE

uuid

UUID(3) 						     Library Functions Manual							   UUID(3)

NAME

       uuid - DCE compatible Universally Unique Identifier library

SYNOPSIS

       #include <uuid/uuid.h>

DESCRIPTION

       The UUID library is used to generate unique identifiers for objects that may be accessible beyond the local system.  This library generates
       UUIDs compatible with those created by the Open Software Foundation (OSF) Distributed Computing Environment (DCE) utility uuidgen.

       The UUIDs generated by this library can be reasonably expected to be unique within a system, and unique across all systems.  They could	be
       used, for instance, to generate unique HTTP cookies across multiple web servers without communication between the servers, and without fear
       of a name clash.

CONFORMING TO

       OSF DCE 1.1

AUTHOR

       Theodore Y. Ts'o

AVAILABILITY

       http://e2fsprogs.sourceforge.net/ <http://e2fsprogs.sourceforge.net/>

SEE ALSO

       uuid_clear(3), uuid_compare(3), uuid_copy(3), uuid_generate(3), uuid_is_null(3), uuid_parse(3), uuid_unparse(3)

1.36								    April 2004								   UUID(3)
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