On 10/23/2011 3:05 PM, Jesus arteche wrote: > hey guys, > > do you know if it is possible to increase the bandwidth in a virtual machine > running on kvm server with etehrnet bonding (LACP), or the bandwidth is > limited by kvm per virtual machine and not for network adaptor???
If you haven't created any host kernel control groups to limit network bandwidth to your guests, then each guest should have full access to all available NIC bandwidth provided by the host kernel. Thus, for example, if you create a bonded ethernet adapter of 4 physical GbE NICs in the host kernel and configure the GbE switch ports accordingly, any KVM guest will be able to use the potential bandwidth of 4 Gb/s. Actual bonded throughput will depend on many factors. Don't expect to get all 4 Gb/s from a single FTP Get operation. Please read the following for more info. Note: You may not need additional link bandwidth. You may simply need to optimize your KVM network configuration to use bridge mode instead of the default user-mode networking. http://publib.boulder.ibm.com/infocenter/lnxinfo/v3r0m0/index.jsp?topic=%2Fliaat%2Fliaatseccgroups.htm Read this for creating control groups on Debian: http://linuxaria.com/article/introduction-to-cgroups-the-linux-conrol-group?lang=en You may not need to bond another interface to increase network performance. You may simply need to optimize what you already have. KVM by default enables user mode networking Read the networking section of this: http://www.linux-kvm.org/page/Tuning_KVM Also read this: http://www.linux-kvm.org/page/Networking_Performance -- Stan -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/4ea54ac5.7060...@hardwarefreak.com
