Hi Jeff, Susan,
In one of the discussions that I had with Juergen regarding datastores
he indicated the refined datastore architecture that I was proposing
wasn't in keeping with the current ephemeral datastore ideas on I2RS,
hence I'm trying to catch up.
I have a few clarifying questions on sections 3.2 of
draft-ietf-i2rs-ephemeral-state that you might be able to help with me
please. I've only just signed up the IR2S, so apologies if these
questions have already been asked/answered.
Section 3.1. Persistence, paragraph 1 is stated as:
Ephemeral-REQ-01: I2RS requires ephemeral state; i.e. state that does
not persist across reboots. If state must be restored, it should be
done solely by replay actions from the I2RS client via the I2RS
agent. Ephemeral state may consist of ephemeral configuration or
ephemeral operational state, or both.
This text makes it clear that "Ephemeral state" consists of both
"ephemeral config" and/or "ephemeral operation state".
Ephemeral-REQ-03 is stated as:
Ephemeral-REQ-03: Ephemeral state must be able to utilized temporary
operational state (e.g. MPLS LSP-ID or a BGP IN-RIB) as a
constraints.
Q1. Am I right in understanding that both ephemeral config and ephemeral
operational state independently have the requirement that they have to
rely on regular operational state as a constraint?
Q2. What is expected to happen if the operational state changes such
that the constraint no longer hold for a ephemeral node? Should that
node be removed, or just stop taking effect? Or expressed differently:
could ephemeral config be regarded as being conditionally applied on a
constraint?
Ephemeral-REQ-04 is stated as:
Ephemeral-REQ-04: Ephemeral state MAY refer to non-ephemeral state
for purposes of implementing constraints. The designer of ephemeral
state modules are advised that such constraints may impact the speed
of processing ephemeral state commits and should avoid them when
speed is essential.
Q3. I think that REQ-03 may already answer this, but to avoid any
confusion: Does this mean that ephemeral config nodes may refer to
non-ephemeral operational state nodes?
Thanks,
Rob
_______________________________________________
i2rs mailing list
i2rs@ietf.org
https://www.ietf.org/mailman/listinfo/i2rs
