[chef] Race Conditions

[Greg Zapp < >]

Hello,

I have a few nagging questions about Chef.  One of them revolves around potential race conditions in updating nodes and databags on Chef Server.  For the life of me I am unable to find any information on how Chef updates node information on the server side.  Does it merge changed keys?  Does it fully overwrite all json keys?  If a client run starts and then some external force updates the node on the server, will node.save(s) on the client overwrite that information?  What about data bags?

I would appreciate any information that could be provided on this topic.  I'm considering drastic measures to to my lack of understanding of the internals:

*Only nodes update their attributes

*Databags have ONE writer, multiple readers

*Desired state stored in data bags

*Current state stored in node attributes or other data bags

@.@

Thanks,

   Greg