[rsyslog] output plugin calling interface

[david at lang.hm]

On Sun, 3 May 2009, Tom Metro wrote:

> Rainer Gerhards wrote:
>> Just think about the fact that all sources besides RELP are much more
>> unreliable than the engine itself. So, compared to the environment in
>> which rsyslog is intended to work, I think it is far more reliable
>> than the whole rest of said system.
>
> Isn't the entry point into syslog also unreliable, such that if the
> daemon exits for any reason, messages get dropped on the floor? If so,
> all the signal handlers and other steps - short of say sticking a queue
> buffer into the kernel - will only get you so far.

it depends on what method you use to get the messages into rsyslog. if you 
make your app talk RELP you should be able to get complete end-to-end 
reliability.

David Lang

>
>> So I am somewhat hesitant to put *a lot* of effort into a small part
>> of reliability which can, if looked at the overall picture, not
>> really be utilized.
>
> I think you're on the right track to take an agile, incremental approach
> of improving the reliability of the weakest links.
>
>  -Tom
>
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