[erlang-questions] Should we deprecate or modernize log_mf_h and rb?

Richard Carlsson <>
Fri Apr 1 13:34:13 CEST 2016


Thanks for pointing out that old mail, Martin! These days though, it's
probably worthwhile to rethink/rewrite these handlers from scratch rather
than import disk_log_h into OTP as it is.


        /Richard

2016-04-01 13:08 GMT+02:00 Martin Bjorklund <>:

> Hi,
>
> We are not using log_mf_h, but instead we're using disk_log_h (see
> http://erlang.org/pipermail/erlang-patches/2012-January/002583.html)
>
> We use this handler to get log rotation, but we log all error logger
> messages in clear text (this should IMO be the default).
>
> If you're interested in adding disk_log_h to OTP (search for
> disk_log_h in disk_log.erl...), the latest version
> (updated as recently as 2006 :) can be found here:
>
> https://github.com/richcarl/otp/blob/disk_log_h/lib/kernel/src/disk_log_h.erl
>
> I support the deprecation initiative!
>
>
> /martin
>
>
>
> Siri Hansen <> wrote:
> > Hello list!
> >
> > log_mf_h is an error_logger event handler which logs events to disk and
> > does log rotation. rb (report browser) is the tool for reading and
> > formatting the logs. The implementation of both modules is quite old and
> > outdated. The fact that there is a size field for the events of only 16
> > bits, which we haven't got any complaints for, has made us believe that
> > there might not be many users of these tools. I'm writing to the list to
> > find out if this is correct...
> >
> > Are you using log_mf_h (e.g. by setting environment variables
> > 'error_logger_mf_*' in sasl) and rb? If so, why - is it the log rotation
> or
> > the binary logging (or both) that you are really after? Have you
> considered
> > alternative tools?
> >
> > Kind Regards
> > /
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> 
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>
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