Title :
Accelerating packets reception and forwarding in virtualized datacenters
Author :
Hocini, Hatem ; Bourguiba, Manel ; Badache, Nadjib
Author_Institution :
LSI, USTHB, Algiers, Algeria
Abstract :
In virtualized data centers, the last hop of the network is no longer handled by a physical network switch, but rather is performed in software inside the server to switch among virtual machines hosted by that server. However, the current I/O network virtualization based on the driver domain is an attractive model since it offers high flexibility and cost-effectiveness. However, it exhibits poor networking performance due to multiple memory transactions between the driver domain and the VM. This paper addresses this challenge by introducing the concept and design of a new I/O subsystem called Next Hop Bridge which identifies the packets belonging to the same flow and processes only the first one of a given flow within the virtual machine. NHB uses a flow table to store the needed information about the packets. Such a switching mechanism allows to considerably avoid unnecessary I/O transactions during the communication between the driver domain and the VM and hence make the VM throughput scale up to line rates.
Keywords :
computer centres; computer networks; virtual machines; I/O network virtualization; NHB; multiple memory transaction; networking performance; next hop bridge; packet reception; physical network switch; switching mechanism; virtual machines; virtualized datacenter; Switches;
Conference_Titel :
Network of the Future (NOF), 2014 International Conference and Workshop on the
DOI :
10.1109/NOF.2014.7119791