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Lori MacVittie

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Top Stories by Lori MacVittie

Sharding for Scale: In the App or in the Network? Sharding has become a popular means of achieving scalability in application architectures in which read/write data separation is not only possible, but desirable to achieve new heights of concurrency. The premise is that by splitting up read and write duties, it is possible to get better overall performance at the cost of a slight delay in consistency. That is, it takes a bit of time to replicate changes initiated by a "write" to the read-only master database. It's eventually consistent, and it's generally considered an acceptable trade off when searching for higher and higher scalability. While the most well-known cases of read/write separation and sharding are based on geography - east coast versus west coast, for example - there are other cases where localized sharding has also been put into play with great succes... (more)

Microservices and HTTP/2 | @DevOpsSummit #DevOps #Microservices

It's all about that architecture. There's a lot of things we do to improve the performance of web and mobile applications.  We use caching. We use compression. We offload security (SSL and TLS) to a proxy with greater compute capacity. We apply image optimization and minification to content. We do all that because performance is king. Failure to perform can be, for many businesses, equivalent to an outage with increased abandonment rates and angry customers taking to the Internet to express their extreme displeasure. The recently official HTTP/2 specification takes performance very... (more)

The Importance of Licensing | @DevOpsSummit #Cloud #DevOps #ContinuousDelivery

The Importance of Licensing to Equalize Dev and Production We’re all aware that dev/test != production environments. While the software stacks upon which applications are deployed may be (and hopefully are) the same, there still remains a whole lot of “infrastructure” (that’s everything else) that isn’t the same. Routers, switches, security devices, load balancers, caches, and other devices dedicated to ensuring the secure delivery of applications to hungry consumer and corporate users simply don’t exist in the dev/test environment. That’s particularly true as organizations cont... (more)

SDN: Network Scalability’s Secret Sauce By @LMacVittie | @CloudExpo #SDN #Cloud

Scaling things seems like such a simple task, doesn’t it? Open a new checkout line. Call a new teller to the front. Hire another person. But under the covers in technology land, where networking standards rule the roost, it really isn’t as simple as just adding another “X”. Oh, we try to make it look that simple, but it’s not. Over the years we (as in the industry ‘we’) have come up with all sorts of interesting ways to scale systems and applications within the constraints that IP networking places upon us. One of those constraints is that physical (L2) and logical (L3) addresses... (more)

Management and Orchestration | @DevOpsSummit #DevOps #Microservices

Early (very early, in fact) in the rise of SDN there were many discussions around scalability. Not of the data plane, but of the control (management) plane. Key to this discussion was the rate at which SDN-enabled network devices, via OpenFlow, could perform “inserts”. That is, how many times per second/minute could the management plane make the changes necessary to adjust to the environment. It was this measurement that turned out to be problematic, with many well-respected networking pundits (respected because they are also professionals) noting that the 1000 inserts per secon... (more)