Scaling out StreamSets with Kubernetes

StreamSets, Docker, KubernetesIn today’s microservice revolution, where software applications are designed as independent services that work together, two technologies stand out. Docker, the defacto standard for containerization, and Kubernetes, a container orchestration and management tool. In this blog I will explain how to run StreamSets Data Collector (SDC) Docker containers on Kubernetes.

Hari NayakScaling out StreamSets with Kubernetes
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Cache Salesforce Data in Redis with StreamSets Data Collector

Redis LogoRedis is an open-source, in-memory, NoSQL database implementing a networked key-value store with optional persistence to disk. Perhaps the most popular key-value database, Redis is widely used for caching web pages, sessions and other objects that require blazingly fast access – lookups are typically in the millisecond range.

At RedisConf 2017 I presented a session, Cache All The Things! Data Integration via Jedis (slides), looking at how the open source Jedis library provides a small, sane, easy to use Java interface to Redis, and how a StreamSets Data Collector (SDC) pipeline can read data from a platform such as Salesforce, write it to Redis via Jedis, and keep Redis up-to-date by subscribing for notifications of changes in Salesforce, writing new and updated data to Redis. In this blog entry, I'll describe how I built the SDC pipeline I showed during my session.

Pat PattersonCache Salesforce Data in Redis with StreamSets Data Collector
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Introducing the Data Collector Support Bundle

Hi, my name is Wagner Camarao and I'm a Software Engineer at StreamSets focusing on the user-facing aspects of our products. Today I'm going to talk about a new feature in the StreamSets Data Collector to optimize the interactions with our support team.

In version of Data Collector, we’ve added a feature called Support Bundle. It allows you to generate an archive file with the most common information required to troubleshoot various issues with Data Collector, such as precise build information, configuration, thread dump, pipeline definitions and history files, and most recent log files.

Wagner CamaraoIntroducing the Data Collector Support Bundle
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Visualizing and Analyzing Salesforce Data with Neo4j

Cases in Neo4jGraph databases represent and store data in terms of nodes, edges and properties, allowing quick, easy retrieval of complex hierarchical structures that may be difficult to model in traditional relational databases. Neo4j is an open source graph database widely deployed in the community; in this blog entry I'll show you how to use StreamSets Data Collector (SDC) to read case data from Salesforce and load it into the graph database using Neo4j's JDBC driver.

Pat PattersonVisualizing and Analyzing Salesforce Data with Neo4j
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Calling External Libraries from the JavaScript Evaluator

JavaScript logoThe Script Evaluators in StreamSets Data Collector (SDC) allow you to manipulate data in pretty much any way you please. I've already written about how you can call external Java code from your scripts – compiled Java code has great performance, but sometimes the code you need isn't available in a JAR. Today I'll show you how to call an external JavaScript library from the JavaScript Evaluator.

Pat PattersonCalling External Libraries from the JavaScript Evaluator
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Quick Tip: Resolving ‘minReplication’ Hadoop FS Error

minReplication ErrorI run StreamSets Data Collector on my MacBook Pro. In fact, I have about a dozen different versions installed – the latest, greatest, older versions, release candidates, and, of course, a development ‘master' build that I hack on. Preparing for tonight's St Louis Hadoop User Group Meetup, I downloaded Cloudera's CDH 5.10 Quickstart VM so I could show our classic ‘Taxi Data Tutorial‘ and Drift Synchronization with Hadoop FS and Apache Hive. Spinning up the tutorial pipeline, I was surprised to see an error: HADOOPFS_13 - Error while writing to HDFS: com.streamsets.pipeline.api.StageException: HADOOPFS_58 - Flush failed on file: '/sdc/taxi/_tmp_sdc-847321ce-0acb-4574-8d2c-ff63529f25b8_0' due to 'org.apache.hadoop.ipc.RemoteException( File /sdc/taxi/_tmp_sdc-847321ce-0acb-4574-8d2c-ff63529f25b8_0 could only be replicated to 0 nodes instead of minReplication (=1). There are 1 datanode(s) running and 1 node(s) are excluded in this operation. I'll explain what this means, and how to resolve it, in this blog post.

Pat PattersonQuick Tip: Resolving ‘minReplication’ Hadoop FS Error
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Making Sense of Stream Processing

StreamThere has been an explosion of innovation in open source stream processing over the past few years. Frameworks such as Apache Spark and Apache Storm give developers stream abstractions on which they can develop applications; Apache Beam provides an API abstraction, enabling developers to write code independent of the underlying framework, while tools such as Apache NiFi and StreamSets Data Collector provide a user interface abstraction, allowing data engineers to define data flows from high-level building blocks with little or no coding.

In this article, I'll propose a framework for organizing stream processing projects, and briefly describe each area. I’ll be focusing on organizing the projects into a conceptual model; there are many articles that compare the streaming frameworks for real-world applications – I list a few at the end.

Pat PattersonMaking Sense of Stream Processing
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StreamSets Data Collector v2.5 Adds IoT, Spark, Performance and Scale

We’re thrilled to announce version 2.5 of StreamSets Data Collector, a major release which includes important functionality related to the Internet of Things (IoT), high-performance database ingest, integration with Apache Spark and integration into your enterprise infrastructure.  You can download the latest open source release here.

This release has over 22 new features, 95 improvements and 150 bug fixes.

Kirit BasuStreamSets Data Collector v2.5 Adds IoT, Spark, Performance and Scale
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Drift Synchronization with StreamSets Data Collector and Azure Data Lake

ADLS Drift PipelineOne of the great things about StreamSets Data Collector is that its record-oriented architecture allows great flexibility in creating data pipelines – you can plug together pretty much any combination of origins, processors and destinations to build a data flow. After I wrote the Ingesting Local Data into Azure Data Lake Store tutorial, it occurred to me that the Azure Data Lake Store destination should work with the Hive Metadata processor and Hive Metastore destination to allow me to replicate schema changes from a data source such as a relational database into Apache Hive running on HDInsight. Of course, there is a world of difference between should and does, so I was quite apprehensive as I duplicated the pipeline that I used for the Ingesting Drifting Data into Hive and Impala tutorial and replaced the Hadoop FS destination with the Azure Data Lake Store equivalent.

Pat PattersonDrift Synchronization with StreamSets Data Collector and Azure Data Lake
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Read and Write JSON to MapR DB with StreamSets Data Collector

MapR DB logoMapR-DB is an enterprise-grade, high performance, NoSQL database management system. As a multi-model NoSQL database, it supports both JSON document models and wide column data models. MapR-DB stores JSON documents in tables; documents within a table in MapR-DB can have different structures. StreamSets Data Collector enables working with MapR-DB documents with its powerful schema-on-read and ingestion capability.

With StreamSets Data Collector, I’ll show you how easy it is to stream data from MongoDB into a MapR-DB table as well as stream data out of the MapR-DB table into MapR Streams.

Rupal ShahRead and Write JSON to MapR DB with StreamSets Data Collector
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