I'm currently performing a lot of manipulation of log files, which grow by up to 100MB/day. The records in the files are of the format 

date/time logentry

[download]

and I want to be able to trim out the older records. Currently, I do this by reading the file line-by-line, and writing out the lines after $arbitrary_data to a temporary file, which is then used to replace the current log file.

This takes a considerable amount of time to process, so any suggestions for a more efficient method would be very gratefully received.

In reply to Removing old records from log files by claree0

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