Hi, Few weeks ago I've started to discuss a standard protocol for statistics submission to use with Zeromq and Crossroads IO. Here is what we came up with at the moment:
https://github.com/estp/estp/blob/master/specification.rst I'm here for two main goals: 1. Discuss the protocol with statistics gurus 2. Propose to add the plugin which implements ESTP over Zeromq into collectd (and the one for crossroads too, in the future) The protocol is text-based and in designed to be human-readable and is parsed super-easily. The questions to the collectd community are following: 1. The DERIVE data source type is used as a COUNTER (with minimum of 0) in every type, even with type called "derive". So are there no use cases for real DERIVE type? 2. The ABSOLUTE data source type is not used in the plugins and is discouraged in docs. With ESTP I'm trying to encourage using ABSOLUTE type (called "delta" in protocol), as it can be easier to be processed by the small stateless application (which is one of the major use cases ESTP is modelled for). Are there any issues of using ABSOLUTE instead of COUNTER in application which can subtract two counter values? Or is there a reason to store ABSOLUTE as GAUGE (by dividing it by interval if needed) ? The plugin code is here: https://github.com/estp/collectd-zeromq-estp To achieve the goals of the protocol, the mapping the collectd data types into ESTP is not lossless. But there is an extension that allows to keep lossless type info, still allowing other clients that doesn't know about collectd extension to parse basic data. So the plugin can be used as a network transport between several collectd instances. Here is the spec: http://github.com/estp/estp/blob/master/collectd-extension.rst What are the requirements for the plugin to be included into collectd? Also what's recommended way for building the plugin that is not in collectd source? I've written simple makefile that uses full collectd source that's checked out as submodule. Is there a better way? Any comments are appreciated. -- Paul _______________________________________________ collectd mailing list [email protected] http://mailman.verplant.org/listinfo/collectd
