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List:       logback-dev
Subject:    [logback-dev] Lumberjack infos - was: Re: Logback Chainsaw Bridge
From:       "Maarten Bosteels" <maarten () apache ! org>
Date:       2007-09-28 8:03:54
Message-ID: 5e87acee0709280103h3d357e1bt8e10fbc624171770 () mail ! gmail ! com
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Hello Joern,

I agree with Jozsef: a bounded blocking queue could be an interesting option.

For me, it would also be acceptable that events are dropped when
the queue fills up: we will always have the log-files as a backup.

see  http://logging.apache.org/log4j/1.2/faq.html#1.2
(I know, it's about log4j not LogBack)

What I want can probably be done with the AsyncAppender
http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/AsyncAppender.html

Ceki, any plans on adding a AsyncAppender to LogBack ?

I have also thought about gzipping the events, with MINA this would be very easy
http://mina.apache.org/report/1.1/apidocs/org/apache/mina/filter/CompressionFilter.html

Maarten

On 9/28/07, Hontvari Jozsef <hontvari3@solware.com> wrote:
>
> > The problem with asynchronous SocketAppenders is that you have
> > essentially three options:
> > a) you keep events in an in memory-back-buffer. This will lead to
> > out-of-memory situations if more events are produced than transfered.
> > At this point your app will either explode or drop events. Both is not
> > really an option.
> > b) you keep the events in a disk-based buffer.This will lead to
> > out-of-disk-space situations if more events are produced than
> > transfered. See a) ;)
> >
> > So event transmission must be synchronous.
>
>
> You can also use a bounded blocking queue. In this way the process is
> usually asynchronous but falls back to (nearly) synchronous it there are
> too many events and slows down the system. But I think the througput
> will be higher even in the latter case.
>
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