I needed/wanted to take advantage of the enhanced DNS caching (I had disabled DNS lookups under 5.x since it appeared essentially every connection was resulting in a lookup), so this past Saturday morning I upgraded to rsyslog v7.6.1 (then today to v7.6.2) using the Adiscon RHEL repo. All of the data I’m accepting is over UDP (three separate listeners), with a TCP listener available for the load balancer service monitor. The four servers send >45GB of data daily with seemingly no major issues identified. I’ve been running v5.x (from the RHEL repos) and they’ve been pretty rock solid over the past couple of years, really. The systems are more or less identically configured running on Red Hat Enterprise 6, and are sitting behind a load balancer. I have four servers dedicated to rsyslog as a gateway for syslog data into our log aggregator.
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