08-01-2014
There is no magic here. You have a fairly large number of people who are intimately familiar with various aspects of various parts of Linux and UNIX systems. If you give these volunteers details about what you're trying to do, you can frequently get excellent tips on how to get an efficient solution to your problem. If you omit details about constraints on how the output is to be produced, we can all waste a lot of time wandering around paths that won't meet your needs.
Various systems provide various extensions to the standard utilities. If you always tell us what version of what OS you're using, we can avoid suggesting that you use extensions that are not available on your system.
Simply put, help us help you by giving us the information we would need to get the job done right on the system you will be using. Give us incomplete data, get one or more responses that meet all of your stated requirements, and then complain that it doesn't do something you never said was important in the first place, and the volunteers who wasted time trying to help you might not be interested in responding to your next request for help. This is just simple human nature.
Enough generalities...
If each of your input files are sorted in reverse numeric order on the key field as in your example (even if the key field is a different field in different files and has different field separators in different files), it would probably still be a lot faster to have an awk preprocessing step to create a single file with the key field, an added file number, and an added line number as fields from all of your input files; sort it by the key field, file #, and line #; and then use awk or sed to strip the file #, line #, and (if it had to be duplicated) the key fields added by the preprocessing step to just leave the desired sorted file as a result.
This could still be a lot faster than firing up a shell and awk for each line in each of the lines in each of all but the first of your 12 to 14 files multiplied by the number of lines in your 1st file (fork() and exec() are expensive operations).
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LEARN ABOUT DEBIAN
sort-dctrl
SORT-DCTRL(1) Debian user's manual SORT-DCTRL(1)
NAME
sort-dctrl - sort Debian control files
SYNOPSIS
sort-dctrl [options] [ file ... ]
sort-dctrl --copying | --help | --version | -ChV
DESCRIPTION
The sort-dctrl program sorts Debian control files according to specified criteria.
A Debian control (dctrl) file is a semistructured single-table database stored in a machine-parseable text file. Such a database consists
of a set of records; each record is a mapping from field names to field content. Textually, records are separated by empty lines, while
each field is encoded as one or more nonempty lines inside a record. A field starts with its name, followed by a colon, followed by the
field content. The colon must reside on the first line of the field, and the first line must start with no whitespace. Subsequent lines,
in contrast, always start with linear whitespace (one or more space or tab characters).
The sort-dctrl program recognizes two field types: string fields and version fields. Version fields act also as numeric fields. String
fields are compared according to strict lexicographical octet-by-octet comparison, after ignoring any initial whitespace after the colon.
Version fields are parsed and compared as Debian version numbers. When comparing version numbers, if a field content does not in fact con-
form to the version number syntax, it compares less than any field content that does conform, and equal to any other nonconforming field
content. The sort-dctrl program assumes all fields are string fields unless told otherwise.
You can specify arbitrary number of keys for sorting, using the -k option. The keys are interpreted in a descending order of priority: the
first key specified is primary, the second key specified is secondary, and so on. If two records compare equal under the primary key, then
they are compared under the secondary key, and so on. If no keys are specified, a default key is assumed (the "Package" field with no mod-
ifiers).
OPTIONS
-k keyspec, --key-spec=keyspec
Specify one or more keys for sorting. You may specify this option any number of times. The keyspec argument consists of a comma-
separated list of key specifications. Each key specification consists of the name of the field that serves as the key, optionally
followed by a colon and key modifiers. The following key modifiers are supported:
r Invert the comparison for this key, reversing the sorting order.
v Treat this field as a version number field.
n Treat this field as numeric, which currently is synonymous with v.
-q, --quiet, --silent
Output nothing to the standard output stream. Instead, exit immediately after finding the first match.
-l level, --errorlevel=level
Set log level to level. level is one of fatal, important, informational and debug, but the last may not be available, depending on
the compile-time options. These categories are given here in order; every message that is emitted when fatal is in effect, will be
emitted in the important error level, and so on. The default is important.
-V, --version
Print out version information.
-C, --copying
Print out the copyright license. This produces much output; be sure to redirect or pipe it somewhere (such as your favourite
pager).
-h, --help
Print out a help summary.
EXAMPLES
Here are some sample invocations of the program:
sort-dctrl /var/lib/dpkg/available
Output the dpkg available file sorted by the package name.
sort-dctrl -k Version:v /var/lib/dpkg/available
Output the dpkg available file sorted in ascending order of version numbers.
sort-dctrl -k Version:vr /var/lib/dpkg/available
Output the dpkg available file sorted in descending order of version numbers.
sort-dctrl -k Package,Version:v /var/lib/dpkg/available
Output the dpkg available file sorted primarily in ascending order of package names and secondarily in descending order of version
numbers.
sort-dctrl -k Installed-Size:n,Size:nr /var/lib/dpkg/available
Output the dpkg available file sorted primarily in ascending order of installation sizes and secondarily in descending order of
package sizes.
AUTHOR
The program and this manual page were written by Antti-Juhani Kaijanaho <ajk@debian.org>.
SEE ALSO
Debian Policy Manual. Published as the Debian package debian-policy. Also available in the Debian website.
grep-dctrl(1)
Debian Project 2005-06-08 SORT-DCTRL(1)