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John Esposito

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Top Stories by John Esposito

Designing for performance is absolutely essential; but runtime is so crazy a variable that we can reasonably blame too-early optimization for a non-negligible chunk of lousy UX and unmaintainable code. The latest Guide to Performance and Monitoring covers both the static and dynamic, the verifiable and the unknowable sides of building and maintaining performant applications. As Tony Hoare notoriously observed, "Premature optimization is the root of all evil:" that is, the benefits of absolutely maximal optimization are usually much lower than the increased cost of maintenance and debugging that results from the brittleness caused by that optimization. On the other hand, the natural tendency of OOP to prioritize form over performance can generate a codebase that is highly readable but partitioned such that performance-oriented refactoring may prove extremely difficul... (more)

The Cloud Isn't Cool Anymore | @CloudExpo #IoT #DigitalTransformation

If the cloud was once (ever) bleeding edge, now the cloud is sheer necessity for anyone doing anything on the Internet. It has changed the way we architect applications, build IT budgets, grow userbases, even write individual lines of code. As the Internet continues to lambdify, cloud services will become more specialized; but for now, how can you take advantage of the granularity, elasticity and pre-baked-ness of modern cloud services? And, on the flip side, as your applications expand outside blade-boxes and even beyond individual data centers, how do you design applications ... (more)

The Textbook Definition of #ContinuousDelivery | @DevOpsSummit #DevOps

To paraphrase Kent Beck: software delivers no value apart from runtime. Ideas take physical form in hardware, virtualized only part of the way down, and someone other than the developers makes the ideas manifest. So then: ops folks are the crop's caretakers; developers design the seeds. Well, of course this isn't true. Developers don't turn pie-in-the-sky math into socially constructive math that sysadmins then make useful. No: developers write code that makes things happen. We care about runtime just as much as ops, so we need to know how our software is helping people in reali... (more)

Beyond DevOps: Security vs. Speed? | @DevOpsSummit #APM #DevOps

Fail fast, fail often. Yeah, but the first failure blew up the satellite. Well, this is just a photo-sharing app..not rocket science. Okay, but your photos are accessed by users who have passwords that they probably use for other things..and aren't some photos as important as satellites? Several problems arise when the harm of software failure cannot be treated as an unbound variable. Here are some thoughts on two. I'll write more on two more (one cognitive, one computational) later. Problem 1: Identity Persists Across Non-Obviously Coupled Systems (So the Stakes Are Higher Than ... (more)

DZone Guide to Data Persistence | @CloudExpo #DataCenter #Storage

Data persistence has a way of sneaking up on developers. You start out with a simple, straightforward database that can functionally hold the data you're working with and the data you need to work with later. But as your needs change, you start to modify it here and there, until it becomes a brittle tangle of tables and keys and indexes. You need something more dynamic, but you need to retain the ability to retrieve your persistent data. Now, you're miles from where you started, and staring down the possibility of having to adopt a whole new system. That persistent data is fundam... (more)