Dr. Wyatt Lloyd on Geo-Replication

Computer Science student or merely a student, join the colloquium this Friday, October 25th from 10:00 to 11:00AM in LC-22.

The Speaker is Dr. Wyatt Lloyd, a post-doctoral researcher currently at Facebook. Titled, “Stronger Consistency and Semantics for Geo-Replicated Storage,” he will focus on these storage systems that allow such colossal websites as Google and Facebook to exist.

His abstract gives a little more information: “Geo-replicated storage systems provide the backend for massive-scale websites such as Google and Facebook. These storage systems seek to provide an always-on experience where every operation completes quickly because of a widely demonstrated link between page load times, user engagement, and revenue. We term systems that provide an always-on experience and can handle data at the required scale “ALPS systems because they provide four key properties: availability, low latency, partition tolerance and scalability.

“Previous ALPS systems made large usability sacrifices in pursuit of their scale and performance goals. They settled for eventually consistent replication between data centers and inconsistent batch operations within them. My research shows that these sacrifices are not fundamental.

“In this talk, I will present the first ALPS system to provide consistency that is stronger than eventual. Specifically, I will show how to provide causal consistency for data stored in multiple data centers, each of which spreads the data across many servers. Then I will show how to strengthen the semantics of that system with a richer data model as well as read-only and write-only transactions.”

Come, join as we listen to Dr. Wyatt Lloyd and begin to understand how ALPS systems may not have to sacrifice consistency in their large-scale quest to provide always-on service.

world - geo replication

Image by Metalogix {link to http://www.metalogix.com/Blog/Blog-Article/12-03-13/Global_Domination%E2%80%A6Of_Your_SharePoint_Farms.aspx}

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