Thoughts, Experiments and Hacking on Distributed Techs
Call for Papers! ADIDSE IARIA Special Track aims at tackling the problems and discussing the advancements in Data-Intensive Distributed Systems Engineering with the community of Engineers and Scientists out there. Come and join us… The advent of the IoT (Internet of Things), by forecasts, is going to bring 40 Billion connected devices by 2020. Such… Continue reading Advancements in Data-Intensive Distributed Systems Engineering
Knot is a network server as well as Haboob. The difference is the concurrency model: Knot is thread-based, instead Haboob is event-based [9]. Clearly, from the benchmark results, the poll()/epoll() mechanism is a serious bottleneck as soon as the number of active concurrent clients become relevant (in the specific case, at 16384 clients the trashing… Continue reading Scaling to Thousands of Threads
Everything begins with a refresher reading of my fundamental papers – yes, I use a set of papers and books as reference material. This paper is titled: “Why Events Are A Bad Idea (for high-concurrency servers)“, by Rob von Behren at the time of writing a PhD fellow at Berkeley [18]. Von Behren opens with: “Event-based… Continue reading Scalable I/O: Events- Vs Multithreading-based
A question raises spontaneously: why Eventual Consistency? Isn’t ACID enough? Let’s try to understand the need for Eventual Consistency guarantees when we talk about Distributed Computing on large scale, and of course Data is involved. With the advent of Internet and Cloud services, Databases and more in general Data Storage technologies have undergone a radical change:… Continue reading Pills of Eventual Consistency
Intro to FOSDEM FOSDEM (Free and Open Source Software Developers’ European Meeting) is the European Open Source Conference oriented to Engineers, grouping the Open Source Communities in a University Campus and managed by volunteers. It is an intensive two days conference that, simply, enlightens… Main Sponsors: RedHat, Google, Oracle, Cisco, Mozilla, Trivago, Bloomberg, GitHib, O’Really… Continue reading FOSDEM 2016 – Day 2 Log
Intro to FOSDEM FOSDEM (Free and Open Source Software Developers’ European Meeting) is the European Open Source Conference oriented to Engineers, grouping the Open Source Communities in a University Campus and managed by volunteers. It is an intensive two days conference that, simply, enlightens… Main Sponsors: RedHat, Google, Oracle, Cisco, Mozilla, Trivago, Bloomberg, GitHib, O’Really… Continue reading FOSDEM 2016 -Day 1 Log
Reasons for the Evolution: Tiered to SOA, SOA to Microservices There is a law governing the electronics evolution and the needs to accommodate such evolution, the Moore’s Law. The complexity for minimum component costs has increased at a rate of roughly a factor of two per year. Certainly over the short term this rate can… Continue reading From Monolithic Three-tiers Architectures to SOA Vs Microservices
Intro In the Zipfian world of AK, the HyperLogLog distinct value (DV) sketch reigns supreme. This DV sketch is the workhorse behind the majority of our DV counters (and we’re not alone) and enables us to have a real time, in memory data store with incredibly high throughput. HLL was conceived of by Flajolet et.…
Why to start with an image? Simple, it’s generally recognized that 1 picture is worth 1000 words! And, this is really true for Engineers… WMware Cloud Management Blog proposes an interesting article on the CQRS (Command and Query Responsibility Separation) Architectural Pattern an its applications, a worth reading. In this short blog post, few more… Continue reading Command and Query Responsibility Separation
For non-subjetc experts it’s not easy to get quickly introduced to OpenStack and its capabilities. Let’s try to demystify this incredibly powerful platform. OpenStack is a Cloud OS (Operating System) in the sense that it provides a set of APIs that programmatically can virtualize and manage the physical resources of any Data Center. This means:… Continue reading Demystifying OpenStack, the Cloud Operating System
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