Tools for viewing logs of unlimited size

It's no secret that application logs can go well beyond the limits of naive log viewers, and the desired viewer functionality (say, filtering the log based on a condition, or highlighting particular message types, or splitting it into sublogs based on a field value, or merging several logs based on a time axis, or bookmarking etc.)开发者_Go百科 is beyond the abilities of large-file text viewers.

I wonder:

• Whether decent specialized applications exist (I haven't found any)
• What functionality might one expect from such an application? (I'm asking because my student is writing such an application, and the functionality above has already been implemented to a certain extent of usability)

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I've been using Log Expert lately.

alt text http://www.log-expert.de/images/stories/logexpertshowcard.gif

I can take a while to load large files, but it will in fact load them. I couldn't find the file size limit (if there is any) on the site, but just to test it, I loaded a 300mb log file, so it can at least go that high.

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Windows Commander has a built-in program called Lister which works very quickly for any file size. I've used it with GBs worth of log files without a problem.

http://www.ghisler.com/lister/

A slightly more powerful tool I sometimes use it Universal Viewer from http://www.uvviewsoft.com/.