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Best way to purge log file -

Hi,

I have a text log file which store the error occurs
in my application. Each error is a line in the log
file with this format:

<Date Time> <Error Code> <Error description>

I wish to purge the log file after certain period of
time for eg. KeepDays = 5 days.

That is those errors that are logged more than 5 days ago
are purged, only keep the existing lines where the date is from
5 days ago till now.

If today is 10-Nov-2005, only keep logs with date from 5-Nov-2005 to
10-Nov-2005.

The only way I would think of is to read the log file, compare
the dates and rewrite it to another file. But I think it would
takes quite sometime for the application to do the check.

Does anyone have a optimise ways to purge the log file ?


Thanks in advance.

 

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