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VEE 2017
Sat 8 - Sun 9 April 2017 Xi'an, China
Sat 8 Apr 2017 10:45 - 11:15 at Zhu Que Room - Ephemeral Chair(s): Hann Huang

The ability to quickly setup and tear down a virtual machine is critical for today’s cloud elasticity, as well as in numerous other scenarios: guest migration/consolidation, event-driven invocation of micro-services, dynamically adaptive unikernel-based applications, micro-reboots for security or stability, etc.

In this paper, we focus on the process of setting up/freeing the hypervisor and host control layer data structures at boot/destruction time, showing that it does not scale in current virtualization solutions. In addition to the direct overhead of long VM setup/destruction times, we demonstrate by experimentation indirect costs on real world auto scaling systems. Focusing on the popular Xen hypervisor, we identify three critical issues hindering the scalability of the boot and destruction processes: serialized boot, unscalable interactions with the Xenstore at guest creation time, and remote NUMA memory scrubbing at destruction time. For each of these issues we present the design and implementation of a solution in the Xen infrastructure: parallel boot with fine-grained locking, caching of Xenstore data, and local NUMA scrubbing. We evaluate these solutions using microbenchmarks, macrobenchmarks, and on real world traces. Results show that our work improves the current Xen implementation by a significant factor, for example macrobenchmarks indicate a speedup of more than 4X in loaded scenarios.

Sat 8 Apr
Times are displayed in time zone: (GMT) Azores change

10:45 - 12:15: Session 1 - Ephemeral at Zhu Que Room
Chair(s): Hann HuangMediaTek
vee-2017-Session-110:45 - 11:15
Vlad NituToulouse University, France, Pierre OlivierVirginia Tech, USA, Alain TchanaToulouse University, France, Daniel ChibaVirginia Tech, USA, Antonio BarbalaceVirginia Tech, USA, Daniel HagimontToulouse University, France, Binoy RavindranVirginia Tech
vee-2017-Session-111:15 - 11:45
Simon KuenzerNEC Europe Ltd., Anton IvanovNEC Europe Ltd., Filipe MancoNEC Europe Ltd., Jose MendesNEC Europe Ltd., Yuri VolchkovNEC Europe Ltd., Florian SchmidtNEC Europe Ltd., Kenichi YasukataNEC Europe Ltd., Michio HondaNEC Europe Ltd., Felipe HuiciNEC Europe Ltd.
vee-2017-Session-111:45 - 12:15
Jinshi ZhangShanghai Jiao Tong University, Yaozu DongIntel Asia-Pacific R&D Ltd, China, Li Jian, Haibing GuanShanghai Jiao Tong University