Spark and Cassandra: An Amazing Apache Love Story by Patrick McFadin

The CERN experiments and their particle accelerator, the Large Hadron Collider (LHC), will soon have collected a total of one exabyte of data. Moreover, the next upgrade of the accelerator, the high-luminosity LHC, will dramatically increase the rate of particle collisions, thus boosting the potential for discoveries but also generating unprecedented data challenges. In order to process and analyse all those data, CERN is investigating complementary ways to the traditional approaches, which mainly rely on Grid and batch jobs for data reconstruction, calibration and skimming combined with a phase of local analysis of reduced data. The new techniques should allow for interactive analysis on much bigger datasets by transparently exploiting dynamically pluggable resources. In that sense, Spark is being used at CERN to process large physics datasets in a distributed fashion. The most widely used tool for high-energy physics analysis, ROOT, implements a layer on top of Spark in order to distribute computations across a cluster of machines. This makes it possible for physics analysis written in either C++ or Python to be parallelised on Spark clusters, while reading the input data from CERN’s mass storage system: EOS. On the other hand, another important use case of Spark at CERN has recently emerged. The LHC logging service, which collects data from the accelerator to get information on how to improve the performance of the machine, is currently migrating its architecture to leverage Spark for its analytics workflows. This talk will discuss the unique challenges of the aforementioned use cases and how SWAN, the CERN service for interactive web-based analysis, now supports them thanks to a new feature: the possibility for users to dynamically plug Spark clusters into their sessions in order to offload computations to those resources.

Données & analyses

©2013 DataStax Conﬁdential. Do not distribute without consent.
@PatrickMcFadin
Patrick McFadin 
Chief Evangelist, DataStax
Spark and Cassandra: An amazing
Apache love story
1

Store a ton of data Analyze a ton of data

Cassandra
Only DC
Cassandra
+ Spark DC
Spark
Jobs

Cassandra
Only DC
Cassandra
+ Spark DC
Spark
Jobs
Spark
Streaming

Worker
Worker
Worker Worker
Analytics WorkloadTransactional Workload

• 10T of high frequency event data daily
• Constant increasing volume
“The web server that powers the interface can query both
datacenters, depending on which the user is closest to,”
“A small set of signals tend to double every eight months. So
we needed a model that can scale linearly.”
- Arun Jayandra, Microsoft

REST API
O365 Event Hub
Ingestion
Worker
(Azure worker role
using DataStax C#
driver)
C* Analytics
REST API
O365
Kafka
C*/
Spark
Streaming
Analytics
G4 – Local SSD
Kafka: G4 – Data Disk
ZooKeeper: A7 – Data Disk
PaaS Small
G4 – Local SSD
Cluster 1:
Cluster 2:
20k – 50k events/sec
200k+ events/sec

Data Protection
• Maximilian Schrems v Data Protection Commissioner
• No longer OK to ship EU data to US under “Safe
Harbour”
Product_Catalog RF=3
Product_Catalog RF=3 Customer_Data RF=3
Customer_Data RF=0
Product_Catalog RF=3
Customer_Data RF=3

• 300k customers
• Report on energy usage
• Predict boiler failure
“We’re dealing largely with time series data, and Spark is 10 to 100
times quicker as it is operating on data in-memory…Cassandra
delivers what we need today and if you look at the Internet of Things
space; that is what is really useful right now.” - Jim Anning, British Gas
Hive Active Heating™

Cassandra
Only DC
Cassandra
+ Spark DC
Spark
Jobs
Spark
Streaming
Home Data Center
Hive Active Heating™

Store a ton of data Analyze a ton of data
Thank you!

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Apache Spark and Tensorflow as a Service with Jim Dowling

Apache Spark and Tensorflow as a Service with Jim Dowling

With the rapid growth of available datasets, it is imperative to have good tools for extracting insight from big data. The Spark ML library has excellent support for performing at-scale data processing and machine learning experiments, but more often than not, Data Scientists find themselves struggling with issues such as: low level data manipulation, lack of support for image processing, text analytics and deep learning, as well as the inability to use Spark alongside other popular machine learning libraries. To address these pain points, Microsoft recently released The Microsoft Machine Learning Library for Apache Spark (MMLSpark), an open-source machine learning library built on top of SparkML that seeks to simplify the data science process and integrate SparkML Pipelines with deep learning and computer vision libraries such as the Microsoft Cognitive Toolkit (CNTK) and OpenCV. With MMLSpark, Data Scientists can build models with 1/10th of the code through Pipeline objects that compose seamlessly with other parts of the SparkML ecosystem. In this session, we explore some of the main lessons learned from building MMLSpark. Join us if you would like to know how to extend Pipelines to ensure seamless integration with SparkML, how to auto-generate Python and R wrappers from Scala Transformers and Estimators, how to integrate and use previously non-distributed libraries in a distributed manner and how to efficiently deploy a Spark library across multiple platforms.

MMLSpark: Lessons from Building a SparkML-Compatible Machine Learning Library...

The Next Accelerator Logging Service (NXCALS) is a new Big Data project at CERN aiming to replace the existing Oracle-based service. The main purpose of the system is to store and present Controls/Infrastructure related data gathered from thousands of devices in the whole accelerator complex. The data is used to operate the machines, improve their performance and conduct studies for new beam types or future experiments. During this talk, Jakub will speak about NXCALS requirements and design choices that lead to the selected architecture based on Hadoop and Spark. He will present the Ingestion API, the abstractions behind the Meta-data Service and the Spark-based Extraction API where simple changes to the schema handling greatly improved the overall usability of the system. The system itself is not CERN specific and can be of interest to other companies or institutes confronted with similar Big Data problems.

Next CERN Accelerator Logging Service with Jakub Wozniak

In Between (A mobile App for couples, downloaded 20M in Global), from daily batch for extracting metrics, analysis and dashboard. Spark is widely used by engineers and data analysts in Between, thanks to the performance and expendability of Spark, data operating has become extremely efficient. Entire team including Biz Dev, Global Operation, Designers are enjoying data results so Spark is empowering entire company for data driven operation and thinking. Kevin, Co-founder and Data Team leader of Between will be presenting how things are going in Between. Listeners will know how small and agile team is living with data (how we build organization, culture and technical base) after this presentation.

Powering a Startup with Apache Spark with Kevin Kim

Improving Traffic Prediction Using Weather Datawith Ramya Raghavendra

In many cases, Big Data becomes just another buzzword because of the lack of tools that can support both the technological requirements for developing and deploying of the projects and/or the fluency of communication between the different profiles of people involved in the projects. In this talk, we will present Moriarty, a set of tools for fast prototyping of Big Data applications that can be deployed in an Apache Spark environment. These tools support the creation of Big Data workflows using the already existing functional blocks or supporting the creation of new functional blocks. The created workflow can then be deployed in a Spark infrastructure and used through a REST API. For better understanding of Moriarty, the prototyping process and the way it hides the Spark environment to the Big Data users and developers, we will present it together with a couple of examples based on a Industry 4.0 success cases and other on a logistic success case.

Hiding Apache Spark Complexity for Fast Prototyping of Big Data Applications—...

Large-scale testing of new data products or enhancements to existing products in a research and development environment can be a technical challenge for data scientists. In some cases, tools available to data scientists lack production-level capacity, whereas other tools do not provide the algorithms needed to run the methodology. At Nielsen, the Databricks platform provided a solution to both of these challenges. This breakout session will cover a specific Nielsen business case where two methodology enhancements were developed and tested at large-scale using the Databricks platform. Development and large-scale testing of these enhancements would not have been possible using standard database tools.

How Nielsen Utilized Databricks for Large-Scale Research and Development with...

Spline: Apache Spark Lineage not Only for the Banking Industry with Marek Nov...

Since the invention of SQL and relational databases, data production has been about specifying how data is transformed through queries. While Apache Spark can certainly be used as a general distributed query engine, the power and granularity of Spark’s APIs enables a revolutionary increase in data engineering productivity: goal-based data production. Goal-based data production concerns itself with specifying WHAT the desired result is, leaving the details of HOW the result is achieved to a smart data warehouse running on top of Spark. That not only substantially increases productivity, but also significantly expands the audience that can work directly with Spark: from developers and data scientists to technical business users. With specific data and architecture patterns spanning the range from ETL to machine learning data prep and with live demos, this session will demonstrate how Spark users can gain the benefits of goal-based data production.

Goal Based Data Production with Sim Simeonov

Have you imagined a simple machine learning solution able to prevent revenue leakage and monitor your distributed application? To answer this question, we offer a practical and a simple machine learning solution to create an intelligent monitoring application based on simple data analysis using Apache Spark MLlib. Our application uses linear regression models to make predictions and check if the platform is experiencing any operational problems that can impact in revenue losses. The application monitor distributed systems and provides notifications stating the problem detected, that way users can operate quickly to avoid serious problems which directly impact the company’s revenue and reduce the time for action. We will present an architecture for not only a monitoring system, but also an active actor for our outages recoveries. At the end of the presentation you will have access to our training program source code and you will be able to adapt and implement in your company. This solution already helped to prevent about US$3mi in losses last year.

Preventing Revenue Leakage and Monitoring Distributed Systems with Machine Le...

Getting Ready to use Redis with Apache Spark is a technical tutorial designed to address integrating Redis with an Apache Spark deployment to increase the performance of serving complex decision models. To set the context for the session, we start with a quick introduction to Redis and the capabilities Redis provides. We cover the basic data types provided by Redis and cover the module system. Using an ad serving use-case, we look at how Redis can improve the performance and reduce the cost of using complex ML-models in production. Attendees will be guided through the key steps of setting up and integrating Redis with Spark, including how to train a model using Spark then load and serve it using Redis, as well as how to work with the Spark Redis module. The capabilities of the Redis Machine Learning Module (redis-ml) will be discussed focusing primarily on decision trees and regression (linear and logistic) with code examples to demonstrate how to use these feature. At the end of the session, developers should feel confident building a prototype/proof-of-concept application using Redis and Spark. Attendees will understand how Redis complements Spark and how to use Redis to serve complex, ML-models with high performance.

Getting Ready to Use Redis with Apache Spark with Dvir Volk

Here we present a general supervised framework for record deduplication and author-disambiguation via Spark. This work differentiates itself by – Application of Databricks and AWS makes this a scalable implementation. Compute resources are comparably lower than traditional legacy technology using big boxes 24/7. Scalability is crucial as Elsevier’s Scopus data, the biggest scientific abstract repository, covers roughly 250 million authorships from 70 million abstracts covering a few hundred years. – We create a fingerprint for each content by deep learning and/or word2vec algorithms to expedite pairwise similarity calculation. These encoders substantially reduce compute time while maintaining semantic similarity (unlike traditional TFIDF or predefined taxonomies). We will briefly discuss how to optimize word2vec training with high parallelization. Moreover, we show how these encoders can be used to derive a standard representation for all our entities namely such as documents, authors, users, journals, etc. This standard representation can simplify the recommendation problem into a pairwise similarity search and hence it can offer a basic recommender for cross-product applications where we may not have a dedicate recommender engine designed. – Traditional author-disambiguation or record deduplication algorithms are batch-processing with small to no training data. However, we have roughly 25 million authorships that are manually curated or corrected upon user feedback. Hence, it is crucial to maintain historical profiles and hence we have developed a machine learning implementation to deal with data streams and process them in mini batches or one document at a time. We will discuss how to measure the accuracy of such a system, how to tune it and how to process the raw data of pairwise similarity function into final clusters. Lessons learned from this talk can help all sort of companies where they want to integrate their data or deduplicate their user/customer/product databases.

Deduplication and Author-Disambiguation of Streaming Records via Supervised M...

The use of large-scale machine learning and data mining methods is becoming ubiquitous in many application domains ranging from business intelligence and bioinformatics to self-driving cars. These methods heavily rely on matrix computations, and it is hence critical to make these computations scalable and efficient. These matrix computations are often complex and involve multiple steps that need to be optimized and sequenced properly for efficient execution. This work presents new efficient and scalable matrix processing and optimization techniques based on Spark. The proposed techniques estimate the sparsity of intermediate matrix-computation results and optimize communication costs. An evaluation plan generator for complex matrix computations is introduced as well as a distributed plan optimizer that exploits dynamic cost-based analysis and rule-based heuristics The result of a matrix operation will often serve as an input to another matrix operation, thus defining the matrix data dependencies within a matrix program. The matrix query plan generator produces query execution plans that minimize memory usage and communication overhead by partitioning the matrix based on the data dependencies in the execution plan. We implemented the proposed matrix techniques inside the Spark SQL, and optimize the matrix execution plan based on Spark SQL Catalyst. We conduct case studies on a series of ML models and matrix computations with special features on different datasets. These are PageRank, GNMF, BFGS, sparse matrix chain multiplications, and a biological data analysis. The open-source library ScaLAPACK and the array-based database SciDB are used for performance evaluation. Our experiments are performed on six real-world datasets are: social network data ( e.g., soc-pokec, cit-Patents, LiveJournal), Twitter2010, Netflix recommendation data, and 1000 Genomes Project sample. Experiments demonstrate that our proposed techniques achieve up to an order-of-magnitude performance.

MatFast: In-Memory Distributed Matrix Computation Processing and Optimization...

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Plus de Spark Summit (20)

FPGA-Based Acceleration Architecture for Spark SQL Qi Xie and Quanfu Wang

VEGAS: The Missing Matplotlib for Scala/Apache Spark with DB Tsai and Roger M...

Apache Spark Structured Streaming Helps Smart Manufacturing with Xiaochang Wu

Improving Traffic Prediction Using Weather Data with Ramya Raghavendra

A Tale of Two Graph Frameworks on Spark: GraphFrames and Tinkerpop OLAP Artem...

No More Cumbersomeness: Automatic Predictive Modeling on Apache Spark Marcin ...

Apache Spark and Tensorflow as a Service with Jim Dowling

MMLSpark: Lessons from Building a SparkML-Compatible Machine Learning Library...

Next CERN Accelerator Logging Service with Jakub Wozniak

Powering a Startup with Apache Spark with Kevin Kim

Improving Traffic Prediction Using Weather Datawith Ramya Raghavendra

Hiding Apache Spark Complexity for Fast Prototyping of Big Data Applications—...

How Nielsen Utilized Databricks for Large-Scale Research and Development with...

Spline: Apache Spark Lineage not Only for the Banking Industry with Marek Nov...

Goal Based Data Production with Sim Simeonov

Preventing Revenue Leakage and Monitoring Distributed Systems with Machine Le...

Getting Ready to Use Redis with Apache Spark with Dvir Volk

Deduplication and Author-Disambiguation of Streaming Records via Supervised M...

MatFast: In-Memory Distributed Matrix Computation Processing and Optimization...

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