CentOS - Jan 2010 - which program/command (perl, vi, or sed) is better

Hi

I have apache log file around 7.6G and record half year

Which program/command (perl, vi, or sed) is better to extract the data by date?
and finally I can remove that big file and still keep the record.

I have problem when using vi and it uses up the server memory

Thank you for your help


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On Fri, 2010-01-01 at 08:45 -0800, ann kok wrote:
> Hi
> 
> I have apache log file around 7.6G and record half year
> 
> Which program/command (perl, vi, or sed) is better to extract the data by
date?
Your question is a little too general.  You want to extract what portion
of the data, into what?

If you want a complete record, you apparently have one already.  If you
want to keep everything, just run it through bzip2 before storing it.

If you just want reports, look at something like webalizer.

If you want something "custom", you will have to decide exactly what
you
want.  Perl or sed or grep could probably extract it, or you could make
a program in python or C or whatever.

But the first task is to define exactly what you want.

-- 
MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com

ann kok wrote:
> Hi
> 
> I have apache log file around 7.6G and record half year
> 
> Which program/command (perl, vi, or sed) is better to extract the data by
date? and finally I can remove that big file and still keep the record.
> 
> I have problem when using vi and it uses up the server memory
> 
> Thank you for your help
> 
If the extraction is simple regex matches you could use sed, but I'd
recommend
perl because it has additional features that you might need if the program 
becomes more complex and it is easier to write in the first place.

But first I'd check to see if any of the available log processing programs
will
already do what you want.  If you are looking for summaries with counts by 
page/time interval/client IP, etc. they may do what you want.  I like analog 
because it is very fast and can deal with multiple files even if the times 
overlap and can uncompress them on the fly http://www.analog.cx/ or download rpm
from http://www.iddl.vt.edu/~jackie/analog/.   Or you might like webalizer if 
you just have one server/file.

-- 
   Les Mikesell
    lesmikesell at gmail.com

ann kok <oiyankok at yahoo.ca> wrote:
>>
Which program/command (perl, vi, or sed) is better to extract the data by
date?
<<

The book "Perl for System Administration ", (David N. Blank-Edelman,
O'Reilly, 2000) has a chapter on using Perl to analyse log files, rotate
and compress them, etc. Luckily, this chapter is the "free sample"
they
provide online - see
http://oreilly.com/catalog/perlsysadm/chapter/ch09.html

Sorted.

I mean, problem solved.

Best,

--- Les Bell
[http://www.lesbell.com.au]
Tel: +61 2 9451 1144