Overview
Live migration of virtual machines is a key management function in cloud computing. Unfortunately, no live migration progress management system exists in the state-of-the-art, leading to:
        (1) guesswork over how long a migration might take and the inability to schedule dependent tasks accordingly;
        (2) unacceptable application degradation when application components become split over distant cloud datacenters for an arbitrary period during migration;
        (3) inability to tradeoff application performance and migration time e.g. to finish migration later for less impact on application performance.
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Pacer is the first migration progress management system that solves these problems. Pacer’s techniques are based on robust and lightweight run-time measurements of system and workload characteristics, efficient and accurate analytic models for progress predictions, and online adaptation to maintain user-defined migration objectives for coordinated and timely migrations. Our experiments on a local testbed and on Amazon EC2 show that Pacer is highly effective under a range of application workloads and network conditions.
People
-
Faculty: T. S. Eugene Ng
- Collaborator: Kunwadee Sripanidkulchai
- Students: Jie Zheng , Zhaolei Liu
Guide
Before running Pacer, you should be comfortable with VM and QEMU.
1. Compile Pacer
Download Pacer version of QEMU
- Unzip the file and enter the directory
- Try:
./configure --prefix=/usr/local/kvmYou should get no error. - Then:
make make install - go to /usr/local/kvm/ to see whether any new files are generated
go to /usr/local/kvm/bin/ you will see qemu-system-x86_64 (this is the right version of qemu that we will use)
2. Boot VM
- Boot VM as you usually do with QEMU. Example:
/usr/local/kvm/bin/qemu-system-x86_64 -enable-kvm -m 1024 -monitor stdio -smp 1
-drive file=/image/vmdk-img/experiment/webserver.img -net nic,macaddr=52:54:00:12:12:52
-usb -usbdevice tablet/usr/local/kvm/bin/qemu-system-x86_64: the QEMU we are using to boot VM
-enable-kvm: option that enables KVM
-m 1024: memory for the VM is 1024MB.
-monitor stdio: output QEMU managment console into terminal
-smp 1: use 1 vcpu
-drive file=/path/to/image
-net nic,macaddr creates a new Network Interface Card and assign MAC address
-usb and -usbdevice is for using mouse in VM
3. Migrate VM
- On the destination machine:
Create an empty image with the same size as the source VM. Example: qemu-img create -f raw /image/migrated/webserver.img 8G
Then, start QEMU using the same command as on the source machine, and append:-incoming tcp:0:5444 Here, 5444 is the port this program listens to.
Example: /usr/local/kvm/bin/qemu-system-x86_64 -enable-kvm -m 1024 -monitor stdio -smp 1
-drive file=/image/migrated/webserver.img -net nic,macaddr=52:54:00:12:12:52
-usb -usbdevice tablet -incoming tcp:0:5444
- On the source machine:
after the VM is booted, inside QEMU console (if you didn't use the -monitor option, press Alt+Ctrl+2 to switch to the console): qemu: migrate -d -b -p tcp:destination_machine_ip:5444 0 The last 0 mean migrate at default rate, you can set desired finish time by altering this number (in second).
Document
Pacer: A Progress Management System for Live Virtual Machine Migration in Cloud Computing, Jie Zheng, T. S. Eugene Ng, Kunwadee Sripanidkulchai, Zhaolei Liu, "Pacer: A Progress Management System for Live Virtual Machine Migration in Cloud Computing", in IEEE Transactions on Network and Service Management, Volume 10 , Issue 4, p.369-382, December 2013Funding
This research was sponsored by the NSF under CNS-1305379, CNS- 1018807 and CNS-1162270, by an Alfred P. Sloan Research Fellowship, an IBM Scholarship, an IBM Faculty Award, and by Microsoft Corp.