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  • Xen Summit
    this year Thank you to all the speakers for contributing and to all the attendees for making XenSummit an interactive and fun conference with lots of discussions You can find presentations on slideshare and videos on vimeo We will also embedded both in the agenda The slides are also available for download as zip file Scaling Xen within Rackspace Cloud Servers Rackspace has years of experience with running Xen at scale starting with Xen and migrating to XenServer We will share why we use Xen XenServer along with some of the issues that we ve experienced We will touch on our experience with migrating from Xen to XenServer and the challenges there We will share information about Rackspace Cloud Servers architecture and touch briefly on OpenStack when doing so We will explain how we use Xen to quickly deploy new Openstack services with what we call Nova on Nova And finally we will discuss what additional features and improvements are needed and why Chris Behrens Team Lead Cloud Servers Development Rackspace Hosting Download original News Press Releases Blog Resources Wiki Sources Downloads Governance Security Information Connect Mailing Lists Search Mailing Lists IRC Twitter LinkedIn Miscellaneous Contact us Legal and Privacy

    Original URL path: http://xen.xensource.com/xensummit/xs12na_talks/T1.html (2016-02-13)
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  • Xen Summit
    handling guest console framebuffer I O and miscellaneous monitoring and management functions Having all these functions in one domain produces a complex environment which is susceptible to shared fate on the failure of any one function has complex interactions between functions including resource contention which makes it difficult to predict performance and has limited flexibility such as requiring the same kernel for all device drivers Domain 0 disaggregation has been discussed for some time as a way to break out domain 0 s functions into separate domains Doing this enables each domain to be tailored to its function such as using a different kernel or operating system to drive different physical devices Splitting functions into separate domains removes some of the unintentional interactions such as in domain resource contention and reduces the system impact of the failure of a single function such as a device driver crash Although domain 0 disaggregation is not new it is seldom used in practise and much of its use is focussed on providing enhanced security Citrix XenServer will be moving towards a disaggregated domain 0 in order to provide better security scalability performance reliability supportability and flexibility This talk will describe XenServer s Windsor architecture and explain how it will provide the above benefits to customers and users We will present an overview of the architecture and some early experimental measurements showing the benefits James Bulpin Director of Technology XenServer Citrix James is responsible for product architecture and future technology within the XenServer product group at Citrix After completing his PhD at the University of Cambridge Computer Laboratory James joined XenSource at its beginning in 2005 initially setting up Xen community infrastructure and building automated test systems mostly in support of the Xen 3 0 0 release He has been involved in every XenServer

    Original URL path: http://xen.xensource.com/xensummit/xs12na_talks/T2.html (2016-02-13)
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  • Xen Summit
    videos on vimeo We will also embedded both in the agenda The slides are also available for download as zip file Improving Xen idle power efficiency Power management has become increasingly important in large scale datacenters to address costs and limitations in cooling or power delivery and it is much critical in mobile client where battery lifecycle is considered as one of the critical characteristics of the platform of choice Good power management helps to achieve great energy efficiency Virtualization imposes additional challenge to power management It involves multiple software layers VMM OS APP For example a good OS software stack may result in bad power consumption if the hypervisor is not the timer unalignment etc In this session we will introduce what we did to improve power efficiency to achieve better power efficiency in both server and client virtualization environment In server side we will introduce additional optimization technologies e g eliminate unnecessary activities align periodic timers to create long idle period to improve package C6 residency to be within 5 overhead with native In client side we will share our client power optimization technologies e g graphics ATA and wireless which successfully reduce XenClient idle power overhead to

    Original URL path: http://xen.xensource.com/xensummit/xs12na_talks/T5.html (2016-02-13)
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  • Xen Summit
    on slideshare and videos on vimeo We will also embedded both in the agenda The slides are also available for download as zip file COLO COarse grain LOck stepping Virtual Machines for Non stop Service Virtual machine VM replication replicating the state of a primary VM running on a primary node to a secondary VM running on a secondary node is a well known technique for providing application agnostic non stop service Unfortunately existing VM replication approaches suffer from excessive replication overhead and for client server systems there is really no need for the secondary VM to match its machine state with the primary VM at all times In this paper we propose COLO COarse grain LOck stepping virtual machine solution for non stop service a generic and highly efficient non stop service solution based on on demand VM replication COLO monitors the output responses of the primary and secondary VMs COLO considers the secondary VM a valid replica of the primary VM as long as network responses generated by the secondary VM match that of the primary The primary VM state is propagated to the secondary VM if and only if outputs from the secondary and primary servers no

    Original URL path: http://xen.xensource.com/xensummit/xs12na_talks/T3b.html (2016-02-13)
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  • Xen Summit
    to all the attendees for making XenSummit an interactive and fun conference with lots of discussions You can find presentations on slideshare and videos on vimeo We will also embedded both in the agenda The slides are also available for download as zip file Porting Xen Paravirtualization to MIPS Architecture A Xen MIPS port implementation will be presented In particular major techniques used for cpu and memory para virtualization on top of xen and linux will be presented The major changes in xen hypervisor xen tools and linux will be illustrated The challenges main issues we faced and solutions we applied will be discussed Overall porting status and next steps will also be discussed Yonghong Song Principle Scientist Broadcom Yonghong Song is currently a principle scientist at Broadcom His main work focuses on linux kernel xen and kvm on Broadcom s multi core multi threaded XLP processors Before broadcom he spent two years at Netlogic Microsystems in the area of deep packet inspection as well as linux kernel He spent nine years at Sun Microsystems before joining Netlogic focusing on optimizing compilers Download original News Press Releases Blog Resources Wiki Sources Downloads Governance Security Information Connect Mailing Lists Search Mailing

    Original URL path: http://xen.xensource.com/xensummit/xs12na_talks/T4.html (2016-02-13)
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  • Xen Summit
    as zip file SDN OpenFlow OpenVSwitch Quantum If you are a cloud computing provider soon you might start facing problems with the network part of it Conventional solutions for network doesn t apply very well for Cloud environments SDN give us a new way of thinking about network embracing Inovation In this session you will see how Locaweb implemented SDN to solve their network problems after 3 years providing Cloud

    Original URL path: http://xen.xensource.com/xensummit/xs12na_talks/T5b.html (2016-02-13)
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  • Xen Summit
    As software stacks grow in complexity traditional ways of understanding failures explaining anomalous executions and analyzing performance are reaching their limits in the face of emergent behavior unrepeatability cross component execution software aging and adversarial changes to code Replay based whole system analyses offer precise solutions to these problems XenTT extends Xen with the ability to replay and analyze the execution of VM guests A number of careful design choices ensure that our implementation which supports single CPU paravirtual Linux guests is efficient maintainable and extensible XenTT s run time checks and offline log comparison tools enabled us to efficiently scale the recording layer by detecting and debugging errors in the determinism of replay Our analysis engine seeks to overcome the semantic gap between an analysis algorithm and the low level state of a guest Using debug information to reconstruct functions and data structures within the guest the engine provides a convenient API for implementing systems analyses The engine implements a powerful debug symbol and VM introspection library which enables an analysis to access the state of the guest through familiar terms To further simplify the development of new analyses the engine provides primitives that support common exploration patterns e g breakpoints watchpoints and control flow integrity checking To enable performance analyses of recorded executions XenTT provides a performance modeling interface which faithfully replays performance parameters of the original run Beyond describing the design and implementation of XenTT this talk will present examples of how we have used deterministic replay to implement security and performance analyses Anton Burtsev University of Utah Anton Burtsev is a PhD student and a Research Associate in the Flux Research Group at the University of Utah Anton has broad research interests in operating systems virtualization distributed systems replay debugging security and performance analysis He is

    Original URL path: http://xen.xensource.com/xensummit/xs12na_talks/T8.html (2016-02-13)
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  • Xen Summit
    the attendees for making XenSummit an interactive and fun conference with lots of discussions You can find presentations on slideshare and videos on vimeo We will also embedded both in the agenda The slides are also available for download as zip file Nested Virtualization Update from Intel Nested Virtualization is becoming hot and required to support multiple emerging usage models like XenClient McAFee Deep Safe HyperV etc After enabling nested VMX support for Xen we have been working on improving its quality and performance to make it run well with these new usages In the session we would like update current status of nested virtualization support in Xen and also demonstrate what we are doing along with new hardware assisted nested virtulization in this area Xiantao Zhang Senior Software Engineer Intel Open Source Technology Center Xiantao Zhang is a Senior Software Engineer from Intel Open Source Technology Center and has been working on Xen since 2005 Xiantao has worked on various areas including Xen IA64 support interrupt virtualization IOMMU nested virtualization etc Xiantao received his Phd Degree in 2008 on Information Security from Wuhan University Download original News Press Releases Blog Resources Wiki Sources Downloads Governance Security Information Connect Mailing

    Original URL path: http://xen.xensource.com/xensummit/xs12na_talks/M11.html (2016-02-13)
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