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Friday, October 25 • 4:45pm - 5:15pm
Xen and XenServer Storage Performance, Felipe Franciosi, Citrix

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The development of low latency storage media such as modern Solid State Drives (SSD) brings new challenges to virtualisation platforms. For the first time, we are witnessing storage back ends which are so fast that the CPU time spent in processing data significantly impacts the delivered throughput. This is aggravated by CPU speeds remaining largely constant while storage solutions get faster by orders of magnitude. To meet user demands and fully exploit SSD performance under Xen, new technologies are necessary. This talk will discuss the Xen storage virtualisation data path when using various back ends (e.g. blkback, tapdisk, qemu). It will explain why it is hard to exploit SSD performance with current technologies and present measurement data for a variety of workloads. Finally, it will show how techniques such as persistent grants and indirect I/O can help to mitigate the problem.

Speakers
avatar for Felipe Franciosi

Felipe Franciosi

Software Performance Engineer, Citrix
I have been a Software Performance Engineer working for Citrix since October 2011, specifically on XenServer Storage Virtualisation. Previously, I finished a PhD at Imperial College London on performance of virtualised storage. | | My experience with Xen dates back to 2006 during my MSc, when I wrote a framework for deploying Xen hosts and VMs over multicast. Xen Site Manager (XSM, presented at Euro-Par 2007) also supported VM migration... Read More →


Friday October 25, 2013 4:45pm - 5:15pm
Moorfoot Hall Edinburgh International Conference Centre

Attendees (8)