Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Response Time and Availability Study of RAFT Consensus in Distributed
  SDN Control Plane   Software defined networking (SDN) promises unprecedented flexibility and ease
of network operations. While flexibility is an important factor when leveraging
advantages of a new technology, critical infrastructure networks also have
stringent requirements on network robustness and control plane delays.
Robustness in the SDN control plane is realized by deploying multiple
distributed controllers, formed into clusters for durability and fast-failover
purposes. However, the effect of the controller clustering on the total system
response time is not well investigated in current literature. Hence, in this
work we provide a detailed analytical study of the distributed consensus
algorithm RAFT, implemented in OpenDaylight and ONOS SDN controller platforms.
In those controllers, RAFT implements the data-store replication, leader
election after controller failures and controller state recovery on successful
repairs. To evaluate its performance, we introduce a framework for numerical
analysis of various SDN cluster organizations w.r.t. their response time and
availability metrics. We use Stochastic Activity Networks for modeling the RAFT
operations, failure injection and cluster recovery processes, and using
real-world experiments, we collect the rate parameters to provide realistic
inputs for a representative cluster recovery model. We also show how a fast
rejuvenation mechanism for the treatment of failures induced by software errors
can minimize the total response time experienced by the controller clients,
while guaranteeing a higher system availability in the long-term.

32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin