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Database Replication applied to Network Management
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Orientador(es)
Resumo(s)
Software Defined Networking (SDN) is a recent approach used to manage networks. Most
of the time it is paired with OpenFlow, a low-level communication protocol used by
controlling and switching devices to communicate. Since it is low-level, it does not grant
the possibility to explore all the switching functionalities, especially as they get extended
with more and more features.
It is therefore required to find alternative ways of coordinating controlling and switching
devices without resorting to low-level protocols to be able to access those functionalities.
One of the possible approaches, which was recently implemented in a data center,
uses databases and its respective replication to store and exchange information between
the devices. Applying the same approach to manage wide area networks would provide
a more flexible way to control them.
The goal of this work consists of improving an existing prototype that simulates a
small network. It was built originally using a SQL database and an asynchronous external
replication software. We replace them with a NoSQL database that natively supports
replication, which enables us to remove unnecessary software from the prototype while
taking advantage of the database features.
Some of the features, the more notable being non-uniform replication with the help
of CRDTs, are used to improve network monitoring, which is a recent addition to the
prototype. Network monitoring is a highly important component of network management
that facilitates decision making processes.
We evaluate the new version of the prototype by comparing with directly with the old
version. We collect the convergence time of the network after an event on a device triggers
a modification in its state to help with the comparison. By splinting the convergence time
into a sum of smaller actions, we take conclusions regarding different moments of the
convergence process.
Descrição
Palavras-chave
Software Defined Networking Databases Replication Mechanism Network Monitoring