O pequeno alquimista e o elixir da longa vida

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Apache Apex (http://apex.apache.org/) is a stream processing platform that helps organizations to build processing pipelines with fault tolerance and strong processing guarantees. It was built to support low processing latency, high throughput, scalability, interoperability, high availability and security. The platform comes with Malhar library - an extensive collection of processing operators and a wide range of input and output connectors for out-of-the-box integration with an existing infrastructure. In the talk I am going to describe how connectors together with the distributed checkpointing (a mechanism used by the Apex to support fault tolerance and high availability) provide exactly-once end-to-end processing guarantees. Speakers: Vlad Rozov is Apache Apex PMC member and back-end engineer at DataTorrent where he focuses on the buffer server, Apex platform network layer, benchmarks and optimizing the core components for low latency and high throughput. Prior to DataTorrent Vlad worked on distributed BI platform at Huawei and on multi-dimensional database (OLAP) at Hyperion Solutions and Oracle.

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One of the key challenges in working with real-time and streaming data is that the data format for capturing data is not necessarily the optimal format for ad hoc analytic queries. For example, Avro is a convenient and popular serialization service that is great for initially bringing data into HDFS. Avro has native integration with Flume and other tools that make it a good choice for landing data in Hadoop. But columnar file formats, such as Parquet and ORC, are much better optimized for ad hoc queries that aggregate over large number of similar rows.

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Session from JFokus 2017 (https://www.jfokus.se/jfokus/talks.jsp#ComparisonofOpenSour) in Stockholm, Sweden. This session shows and compares open source frameworks built to develop very lightweight applications or microservices, which can be deployed on small devices with very low resources and wire together all different kinds of hardware devices, APIs and online services. The focus of this session is the comparison of open source projects such as Node-RED or Flogo, which offer a zero-code environment with web IDE for building and deploying integration and data processing directly onto connected devices using IoT standards such as MQTT, WebSockets or CoaP, but also other interfaces such as Twitter feeds or REST services. The end of the session compares these open source projects to other options such as SaaS offerings like AWS IoT or more powerful streaming analytics platforms.

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Presenter: Devendra Tagare - DataTorrent Engineer, Contributor to Apex, Data Architect experienced in building high scalability big data platforms. Apache Apex is a next generation native Hadoop big data platform. This talk will cover details about how it can be used as a powerful and versatile platform for big data. Apache Apex is a native Hadoop data-in-motion platform. We will discuss architectural differences between Apache Apex features with Spark Streaming. We will discuss how these differences effect use cases like ingestion, fast real-time analytics, data movement, ETL, fast batch, very low latency SLA, high throughput and large scale ingestion. We will cover fault tolerance, low latency, connectors to sources/destinations, smart partitioning, processing guarantees, computation and scheduling model, state management and dynamic changes. We will also discuss how these features affect time to market and total cost of ownership.

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Understanding the types of entities expressed in a search query (Company, Skill, Job Title, etc.) enables more intelligent information retrieval based upon those entities compared to a traditional keyword-based search. Because search queries are typically very short, leveraging a traditional bag-of-words model to identify entity types would be inappropriate due to the lack of contextual information. We implemented a novel entity type recognition system which combines clues from different sources of varying complexity in order to collect real-world knowledge about query entities. We employ distributional semantic representations of query entities through two models: 1) contextual vectors generated from encyclopedic corpora like Wikipedia, and 2) high dimensional word embedding vectors generated from millions of job postings using Spark MLlib. In order to enable real-time recognition of entity types, we utilize Apache Solr to cache the embedding vectors generated by Spark MLlib. This approach enable us to recognize entity types for entities expressed in search queries in less than 60 milliseconds which makes this system applicable for real-time entity type recognition.

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Spark Streaming makes it easy to build scalable, robust stream processing applications — but only once you’ve made your data accessible to the framework. If your data is already in one of Spark Streaming’s well-supported message queuing systems, this is easy. If not, an ad hoc solution to import data may work for a single application, but trying to scale that approach to complex data pipelines integrating dozens of data sources and sinks with multi-stage processing quickly breaks down. Spark Streaming solves the realtime data processing problem, but to build large scale data pipeline we need to combine it with another tool that addresses data integration challenges. The Apache Kafka project recently introduced a new tool, Kafka Connect, to make data import/export to and from Kafka easier. This talk will first describe some data pipeline anti-patterns we have observed and motivate the need for a tool designed specifically to bridge the gap between other data systems and stream processing frameworks. We will introduce Kafka Connect, starting with basic usage, its data model, and how a variety of systems can map to this model. Next, we’ll explain how building a tool specifically designed around Kafka allows for stronger guarantees, better scalability, and simpler operationalization compared to other general purpose data copying tools. Finally, we’ll describe how combining Kafka Connect and Spark Streaming, and the resulting separation of concerns, allows you to manage the complexity of building, maintaining, and monitoring large scale data pipelines.

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Modern businesses have data at their core, and this data is changing continuously. How can we harness this torrent of information in real-time? The answer is stream processing, and the technology that has since become the core platform for streaming data is Apache Kafka. Among the thousands of companies that use Kafka to transform and reshape their industries are the likes of Netflix, Uber, PayPal, and AirBnB, but also established players such as Goldman Sachs, Cisco, and Oracle. Unfortunately, today’s common architectures for real-time data processing at scale suffer from complexity: there are many technologies that need to be stitched and operated together, and each individual technology is often complex by itself. This has led to a strong discrepancy between how we, as engineers, would like to work vs. how we actually end up working in practice. In this session we talk about how Apache Kafka helps you to radically simplify your data processing architectures. We cover how you can now build normal applications to serve your real-time processing needs — rather than building clusters or similar special-purpose infrastructure — and still benefit from properties such as high scalability, distributed computing, and fault-tolerance, which are typically associated exclusively with cluster technologies. Notably, we introduce Kafka’s Streams API, its abstractions for streams and tables, and its recently introduced Interactive Queries functionality. As we will see, Kafka makes such architectures equally viable for small, medium, and large scale use cases.

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Slides from http://www.meetup.com/Hadoop-User-Group-Munich/events/230313355/ This is an overview of architecture with use cases for Apache Apex, a big data analytics platform. It comes with a powerful stream processing engine, rich set of functional building blocks and an easy to use API for the developer to build real-time and batch applications. Apex runs natively on YARN and HDFS and is used in production in various industries. You will learn more about two use cases: A leading Ad Tech company serves billions of advertising impressions and collects terabytes of data from several data centers across the world every day. Apex was used to implement rapid actionable insights, for real-time reporting and allocation, utilizing Kafka and files as source, dimensional computation and low latency visualization. A customer in the IoT space uses Apex for Time Series service, including efficient storage of time series data, data indexing for quick retrieval and queries at high scale and precision. The platform leverages the high availability, horizontal scalability and operability of Apex.

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Large-scale data stream processing has come a long way to where it is today. It combines all the essential requirements of modern data analytics: subsecond latency, high throughput and impressively, strong consistency. Apache Flink is a system that serves as a proof-of-concept of these characteristics and it is mainly well-known for its lightweight fault tolerance. Data engineers and analysts can now let the system handle Terabytes of computational state without worrying about failures that can potentially occur. This presentation describes all the fundamental challenges behind exactly-once processing guarantees in large-scale streaming in a simple and intuitive way. Furthermore, it demonstrate the basic and extended versions of Flink's state-of-the-art snapshotting algorithm tailored to the needs of a dataflow graph.

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February 2017 HUG: Exactly-once end-to-end processing with Apache Apex

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How to Integrate Spark MLlib and Apache Solr to Build Real-Time Entity Type R...

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Introducing Kafka's Streams API

Apache Apex: Stream Processing Architecture and Applications

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