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Full Discussion: File Handling
Top Forums UNIX for Advanced & Expert Users File Handling Post 302245137 by baanprog on Thursday 9th of October 2008 12:03:02 PM
Old 10-09-2008
File Handling
Hi,

I have a log file which runs into 3 to 5 GB.

We store this typically for 6 months. When a new month starts we move the previous month into a 9 month back up log (file.9m) and delete the last month of the 9 month back up.

Iam using awk to find the data and cat to join the files like below

BEGIN { FS = "|"}

{ if (($5 == "09") && ($6 == "08")) print $0 >> "/file.1m";
}

END { print "script processed " NR}

in the above $5 is month and $6 is the year and the log file has pipe separated columns

cat /file.6m /new.log > /file.temp
mv /file.temp /new.log

the file.6m is the back up file when a new month starts and the new.log is the running log.

similarly I extract file.1m(last month) from file.6m and file.8m ( eight months without the last month from the file.9m) and join using cat as above.

This process though is NOT neat, is yielding the result.

I would like to know if there is any better of doing this. Since the file is really large sometimes i find the data jumbled up.

Appreciate your inputs.
 

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LEARN ABOUT REDHAT

cal

CAL(1)							    BSD General Commands Manual 						    CAL(1)

NAME

     cal -- displays a calendar

SYNOPSIS

     cal [-smjy13] [[month] year]

DESCRIPTION

     Cal displays a simple calendar.  If arguments are not specified, the current month is displayed.  The options are as follows:

     -1      Display single month output.  (This is the default.)

     -3      Display prev/current/next month output.

     -s      Display Sunday as the first day of the week.  (This is the default.)

     -m      Display Monday as the first day of the week.

     -j      Display Julian dates (days one-based, numbered from January 1).

     -y      Display a calendar for the current year.

     A single parameter specifies the year (1 - 9999) to be displayed; note the year must be fully specified: ``cal 89'' will not display a calen-
     dar for 1989.  Two parameters denote the month (1 - 12) and year.	If no parameters are specified, the current month's calendar is displayed.

     A year starts on Jan 1.

     The Gregorian Reformation is assumed to have occurred in 1752 on the 3rd of September.  By this time, most countries had recognized the ref-
     ormation (although a few did not recognize it until the early 1900's.)  Ten days following that date were eliminated by the reformation, so
     the calendar for that month is a bit unusual.

HISTORY

     A cal command appeared in Version 6 AT&T UNIX.

OTHER VERSIONS

     Several much more elaborate versions of this program exist, with support for colors, holidays, birthdays, reminders and appointments, etc.
     For example, try the cal from http://home.sprynet.com/~cbagwell/projects.html or GNU gcal.

BSD
								   June 6, 1993 							       BSD
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