When comparing Rsyslog vs ODE, the Slant community recommends Rsyslog for most people. In the question“What are the best log management, aggregation & monitoring tools?” Rsyslog is ranked 9th while ODE is ranked 35th. The most important reason people chose Rsyslog is:
Rsyslog is a free and open source tool.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free and Open Source
Rsyslog is a free and open source tool.
Pro Scales easily
ODE instances are independent of each other, so they don't have to worry about a peer being added/removed. This allows the cluster to grow without any performance hit on the log aggregation. There is no redundancy built-in, but you can always use the forwarder to duplicate data. There is no sharding configuration or any other penalty that comes up with scaling a cluster. The clustering configuration is also very easy where you just list out peers for one of the node in order for it to run a search query on the whole cluster and merge the results. Scales better than any other open source log management tool out there.
Pro Add new parsers as you like
You can add any parser you want to ODE.
Pro Highly customizable
Pro Easy to use
Cons
Con Difficult to configure
The config is not user friendly at all compared to syslog-ng
Con Not spread to many platforms
Rsyslog is only available for Linux and Solaris.
Con Still in beta
Opallios ODE seems to be still in beta, as such there may be issues or missing features which are not yet implemented.