Comments
Re: Cool video from a business standpoint ...
Re: several minutes delay?
Yes, before notifications could take up to several minutes and it was not deterministic because of two stats pooling times in between.
The time for repairing can vary a lot depending on a number of factors that may be external to the virtual infrastructure management (VIM) platform, e.g. OpenStack. For instance, a recovery action could be, as presented in this article, switching to a standby VNF triggered by the upper layers (e.g. VNF, VNF Manager, NFV Orchestrator) and that takes milliseconds. We measured 103 milliseconds from active-standby switching action to recovery in an OpenStack testbed (Use Case #2 https://wiki.opnfv.org/download/attachments/5046291/20150730_doctor_demo_v6.pdf).
Another recovery action could involve actions to the VIM such as evacuation of the VNF/VM to another compute node – in this case, it could take up to seconds (we measured 58-second evacuation time in an OpenStack testbed; Use Case #1). However, for telco operation, switching to the standby VNF would be necessary before such evacuation actions.
1 whole second
Is that good enough?
What's the current detection and failover time for VoLTE or even older spec voice ?
While the article doesn't explicitly state it, I expect that Doctor can handle n+1. Is that correct, or does it only do Active/Standy, ie 1+1.
Thanks for bringing this effort to light. If you hadn't pointed it out, we'd still be thinking that NFV had sub-second response times like people expect from transport networks.
JohnBarnes
4/13/2016 7:56:34 AM User Rank Platinum
If I'm understanding this correctly the basic structure is hub and spoke ...
... with hubs defined at an arbitrary network/junction distance from the rim of applications. I'm just wondering if it would be possible to devolve more and more of the analysis/repair functions down into local processors and have them report back that they found a problem and fixed it rather than requiring the whole problem-identification-attempt-solution-evaluation cycle to pass through the upper reaches of the pyramid?
Or have I misunderstood the architecture?
JohnBarnes
4/13/2016 7:53:17 AM User Rank Platinum
Cool video from a business standpoint ...
... for those of us on the tech/biz interface, it would be great, though, to see some kind of packet simulation: error happens here, how does it become local message? How does local message transfer/convert upchain, and how does fix propagate downward?
I realize that our engineering writer here was probably already driven half-mad by all the cool things they didn't give him space to explain, but the right animation/simulation would help a great deal for those of us trying to follow (in a naive, semi-technical way).
jbtombes
4/11/2016 3:45:29 PM User Rank Platinum
several minutes delay?
Absent Doctor, notification of failure to the app manager takes several minutes? Wow. It's good that someone - or some group of someones - got around to addresssing that delay. So now notification can occur within a second. How long before the repair takes effect?
clrmoney
4/9/2016 1:15:27 PM User Rank Platinum
NFV
I think that this need to get this resolved relating to data management and virtualization tools for our computers and processors etc.
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