Hi, back in October I asked on the NETMOD mailing list how state is merged into the configuration if I mount a remote datastore and whether that resembles ephemeral state as discussed in I2RS. The response I got was a "this depends on the logic of the specific application" answer. I hope that I2RS will go for more precisely defined semantics.
/js On Mon, Nov 10, 2014 at 11:14:05AM -0500, Jeffrey Haas wrote: > Martin, > > On Mon, Nov 10, 2014 at 08:34:23AM +0100, Martin Bjorklund wrote: > > Jeffrey Haas <[email protected]> wrote: > > > One item I would like to proactively draw the working group's attention to > > > is the mount-point drafts: > > > > Jeff, can you elaborate? I don't understand how the mount technique > > is related to I2RS ephemeral state. mount is a way to incorporate > > data from some datastore into another, and this seems to be orthogonal > > to I2RS requirements for ephemeral state. > > The main reason to draw I2RS attention to the draft is not that it intends > to solve the ephemeral state issue but that the remote-mount technique runs > into the same consistentcy issues that were problematic for ephemeral state > systems when the ephemeral state had become out of sync with the local > static config. > > The remote-mount draft suggests an "eventual consistency" model. While that > concept is not directly analogous to our likely solution space, the need of > the system to be able to deal with temporary inconsistency is one that has > good use when talking about our ephemeral state problems. > > A second thing that I found useful about the draft is that, should I2RS > decide to not permit overriding of configuration state via ephemeral state, > the mount-point concept provides some use cases to demonstrate what you > could do. The ability to override hasn't been explicitly accepted as > something we *must* do in I2RS and has been a source of something that makes > things hard. > > -- Jeff > > _______________________________________________ > i2rs mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/i2rs -- Juergen Schoenwaelder Jacobs University Bremen gGmbH Phone: +49 421 200 3587 Campus Ring 1, 28759 Bremen, Germany Fax: +49 421 200 3103 <http://www.jacobs-university.de/> _______________________________________________ i2rs mailing list [email protected] https://www.ietf.org/mailman/listinfo/i2rs
