Comments on: Thoughts on reliable syslog http://mschuette.name/wp/2008/03/31/thoughts-on-reliable-syslog/ 枕草子 Tue, 08 Jun 2010 21:01:37 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Rainer Gerhards http://mschuette.name/wp/2008/03/31/thoughts-on-reliable-syslog/comment-page-1/#comment-79 Rainer Gerhards Tue, 22 Apr 2008 12:44:08 +0000 http://mschuette.name/wp/2008/03/31/thoughts-on-reliable-syslog/#comment-79 Hi, this is a a really good summary of the problems encountered with reliable syslog. You just missed one thing, I think: a buffer must not necessarily exist only in main memory. When the in-core buffer runs out of space, you may also use a disk-based buffer, which offers much more capacity. Of course, even the largest disk-based buffer may be exhausted at some point, where one needs to resort to other strategies. But a disk-based buffer is an excellent solution for temporary (but lengthy) receiver outages. As as side-note, rsyslog has implemented all three buffer handling options. If you are interested, you may want to have a look at it's queue module description (yes, this proves the point of being a produce-consumer problem ;)): <a href="http://www.rsyslog.com/doc-queues.html" rel="nofollow">http://www.rsyslog.com/doc-queues.html</a> Rainer Hi, this is a a really good summary of the problems encountered with reliable syslog. You just missed one thing, I think: a buffer must not necessarily exist only in main memory. When the in-core buffer runs out of space, you may also use a disk-based buffer, which offers much more capacity. Of course, even the largest disk-based buffer may be exhausted at some point, where one needs to resort to other strategies. But a disk-based buffer is an excellent solution for temporary (but lengthy) receiver outages. As as side-note, rsyslog has implemented all three buffer handling options. If you are interested, you may want to have a look at it’s queue module description (yes, this proves the point of being a produce-consumer problem ;)):

http://www.rsyslog.com/doc-queues.html

Rainer

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