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Wednesday, August 20


Group Based Policy: Open Source Policy in OpenDaylight and OpenStack Neutron - Kyle Mestery, Cisco
As computing has continued to evolve to a more utility or cloud-like environment, one area which has not evolved as much is networking. Concepts relevant 20 years ago such as ports, networks, subnets and routers are today still very much the basic building blocks for operators and application deployers. Group Based Policy looks to change this landscape by introducing the concepts of groups of endpoints and policy abstractions governing the communication between the groups. With Group Based Policy, application deployers can think in terms relevant to their applications when deploying networking for their applications. This talk will cover an introduction to Group Based Policy and explore it’s implementation in OpenStack Neutron and OpenDaylight. An overview of how the two work together to achieve harmony for application deployers will also be discussed.

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Kyle Mestery

Principal Engineer, Cisco
Kyle is a Principal Engineer at Cisco Systems where he works on OpenStack, Open Daylight, and Open vSwitch. He is a core team member of the OpenStack Neutron project and the founder of the Minnesota OpenStack Meetup. Kyle has been writing systems software for more than 15 years. Kyle... Read More →

Wednesday August 20, 2014 12:15pm - 1:05pm
Thursday, August 21


Why You Should Consider Using btrfs, Real COW Snapshots and File Level Incremental Server OS Upgrades Like Google Does - Marc Merlin, Google
The presentation will give you everything you know to get up to speed with btfrs, why you should want to trust your data to btrfs, how it offers a lot of what ZFS offers without the licensing problems, as well as best practices for using it. I will go into: - the basics of administration of a btrfs filesystem - How btrfs, swraid, dmcrypt, and lvm fit or don't fit together - how to work with a single storage pool and create all your partitions from it without having to ever resize them, or require LVM as a slow and somewhat unreliable block layer. - how to have virtually as many snapshots as you want and why you really want this - how to do very efficient block level backups of changes only and much faster than rsync ever will - how those block backups can be used to deploy OS upgrades at the file level like I explained in my talk on how Google maintains its many servers last year.

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Marc Merlin

Linux Geek / BOFH, Google
Marc has been using Linux since 0.99pl15f (slackware 1.1.2, 1994), both as a sysadmin and userland contributor. He has worked for various tech companies in the Silicon Valley, including Network Appliance, SGI, VA Linux, Sourceforge.net, and now Google. | He has been giving Linux... Read More →

Thursday August 21, 2014 4:30pm - 5:20pm
Sheraton Ballroom II
Friday, August 22


Cache Strategies For Microservice-Based Web Apps - Glen Campbell, Rackspace
Many web applications are now composed of data from multiple backend services, each focused on a specific domain of data. Handling these services can cause performance issues because "over the wire" data is orders of magnitude slower than locally-available data. 

This session is a broad overview of a variety of methods and architectures for caching data to improve performance. These techniques range from autonomous HTTP caches like reverse proxies to manually-managed cache systems like memcached and others. In addition, there are techniques for caching SQL and NoSQL database data to avoid repetitive queries. 
Web apps that use multiple microservices can also benefit from architectural changes such as adding a service aggregation layer to minimize HTTP requests and improve the cacheability of the data.


Glen Campbell

Glen Campbell is a member of the Rackspace Developer Relations Group and was formerly the lead developer for the php-opencloud library and the little-known Siteframe website framework. | | His computing experience started in the 1970's programming the COSMAC ELF and changing tubes... Read More →

Friday August 22, 2014 10:45am - 11:35am


Tuning Applications For Your IT Infrastructure: What Can Go Wrong - Rosemary Francis, Ellexus
Even when the software and IT infrastructure have been well designed, installation and configuration problems often arise. In high-performance computing, developers often spend a lot of time optimising their code. However, the deployed system will inevitably be designed differently from the development environment. When moving applications from local storage to a distributed system, something as simple as a file stored in the wrong place can significantly affect performance. Accessing the file system unnecessarily can slow down the network and hinder other jobs that share that resource. In this talk Rosemary will be sharing some of the ways in which software can be miss-configured and how those problems may be avoided in future. She will outline design decisions and best practices that we will all have to care about more as applications move to the cloud.

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Rosemary Francis

Technical Director, Ellexus
Dr. Rosemary Francis is the Technical Director of Ellexus Ltd. Rosemary obtained her PhD in Computer Architecture from the Cambridge University Computer Lab. After working in the chip design industry, Rosemary founded Ellexus to help manage the complex tool chains needed for semiconductor... Read More →

Friday August 22, 2014 1:45pm - 2:35pm
Sheraton Ballroom IV