Hi, I'm also interested in it. You submitted a talk about it to Paris Summit right?
On Thu, Oct 16, 2014 at 10:34 AM, Gareth <[email protected]> wrote: > > Here is introducing OSv to all OpenStack developers. OSv team is focusing > on performance of KVM based guest OS, or cloud application. I'm interested > in it because of their hard work on optimizing all details. And I had also > worked on deploying OSv on OpenStack environment. However, since my work is > only for private interests in off working time, my progress is pretty slow. > So I have to share my experience and hope other engineers could join it: > > # OSv highlights in my mind > > 1, Super fast booting time means nearly zero down time services, an > alternative way to dynamic flavor changing and time improvement for > deploying instances in KVM based PaaS platform. 2, Great work on > performance. Cloud engineers could borrow experience from their work on > guest OS. 3, Better performance on JVM. We could imagine there are many > overhead and redundancy in host OS/guest OS/JVM. Fixing that could help > Java applications perform closer to bare-metal. > > # Enabling OSv on OpenStack > > Actually there should not be any big problems. The steps are that building > OSv qcow2 image first and boot it via Nova then. You may face some problems > because OSv image need many new Qemu features, such as virtio-rng-io/vhost > and enable-kvm flag is necessary. > > Fortunately, I don't meet any problems with network, Neutron (actually I > thought before network in OpenStack maybe hang me for a long time). OSv > need a tap device and Neutron does good job on it. And then I could access > OSv service very well. > > # OSv based demo > > The work I finished is only a memcached cluster. And the result is > obvious: memory throughout of OSv based instance has 3 times than it in > traditional virtual machines, and 90% of performance on host OS[0][1]. > Since their work on memcached is quite mature, consider OSv if you need > build memcached instance. > > Another valuable demo cluster is Hadoop. When talking about Hadoop on > OpenStack, the topic asked most frequently is the performance on virtual > machines. A known experience is higher version Qemu would help fix disk I/O > performance[2]. But how does the overlap in JVM/guest OS? I would love to > find that, but don't have so much time. > > After of all, the purpose of this thread is to bring an interesting topic > on cloud performance and hope more and more efficient clusters based on > OpenStack (in production use). I don't have so much time on OSv because > this just is my personal interest, but I could prove OSv is a valuable way > and topic. > > [0] http://paste.openstack.org/show/121382/ > [1] https://github.com/cloudius-systems/osv/wiki/OSv-Case-Study:-Memcached > [2] > https://www.openstack.org/summit/openstack-summit-atlanta-2014/session-videos/presentation/performance-of-hadoop-on-openstack > > -- > Gareth > > *Cloud Computing, OpenStack, Distributed Storage, Fitness, Basketball* > *OpenStack contributor, kun_huang@freenode* > *My promise: if you find any spelling or grammar mistakes in my email from > Mar 1 2013, notify me * > *and I'll donate $1 or ￥1 to an open organization you specify.* > > _______________________________________________ > OpenStack-dev mailing list > [email protected] > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > -- Zhipeng Huang Research Assistant Mobile Ad-Hoc Network Lab, Calit2 University of California, Irvine Email: [email protected] Office: Calit2 Building Room 2402 OpenStack, OpenDaylight, OpenCompute affcienado
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