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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Frank Cox
2010-Jan-01 17:09 UTC
[CentOS] which program/command (perl, vi, or sed) is better
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
Les Mikesell
2010-Jan-01 17:14 UTC
[CentOS] which program/command (perl, vi, or sed) is better
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
Les Bell
2010-Jan-02 00:08 UTC
[CentOS] which program/command (perl, vi, or sed) is better
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