• The Power of Lightweight Transactions

    2000 S Colorado Blvd

    Hello, Colorado Cassandra Users! It's been a while. We hope you'll join us to talk C*. ~Agenda~ 5 pm: Food & Social Time 6-ish pm: Presentation (Cassandra for Galactic Domination: The Power of Lightweight Transactions) --The Power of Lightweight Transactions by Eric Zietlow Lightweight transactions are extremely powerful when used correctly. They not only enable you to use a highly durable distributed system in an ACID like way but they allow you to do it with ease. In this talk we will explore the application of lightweight transactions and when they should be used. Eric Zietlow is a Cloud Developer Advocate at DataStax. He has been in the field for 5 plus years. Prior to being a Developer Advocate, he was a Solution Architect with over 800 accounts. Before DataStax he worked for a systems integration startup.

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  • A Helmsman meets a Daughter of Troy: The introduction of Kubernetes & Cassandra

    For this meetup we are excited to be doing a joint meetup with the Kubernetes Colorado (http://www.meetup.com/Kubernetes-Colorado/) group! Our presenter Chris Love will present on using Cassandra on Kubernetes. What You'll Learn At This Meetup: • Cassandra overview • Running Cassandra in production challenges • Running Cassandra in cluster challenges • What Cassandra on Kubernetes allows • Setup of Cassandra on Kubernetes • Where the project is at • Where it is heading *A big thank you to Deis for hosting us and sponsoring food and drinks! About Chris Love: Chris has 15 years of experience in enterprise software and user experience with great success in Big Data, Ad Serving, Enterprise Integration and Opensouce. His work with Internet Broadcasting was cited as; “continuing to keep the edge in the Internet broadcast industry through its unique broadcast and technical infrastructure”, by the DENVER BUSINESS WIRE. He has architected key projects with such companies as Accenture, Motorola, Johnson & Johnson, Micron, Sun Microsystems, ADP, Exactis, Intuit, Warner Bros, First Data, BEA, AT&T and Oracle. Chris is passionate about scalable open source technologies and the Apollobit platform is built on open source software, from the back-end to the front-end.

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  • Analytics with Spark and Cassandra

    Comcast

    For this meetup we are excited to be join by the great Tim Berglund, Director of Training at DataStax who will discuss Spark and see how it works together with Cassandra to deliver a powerful open-source big data analytic solution. What You'll Learn At This Meetup: Apache Cassandra is a leading open-source distributed database capable of amazing feats of scale, but its data model requires a bit of planning for it to perform well. Of course, the nature of ad-hoc data exploration and analysis requires that we be able to ask questions we hadn’t planned on asking—and get an answer fast. Enter Apache Spark. Spark is a distributed computation framework optimized to work in-memory, and heavily influenced by concepts from functional programming languages. It’s exactly what a Cassandra cluster needs to deliver real-time, ad-hoc querying of operational data at scale. In this talk, we’ll explore Spark and see how it works together with Cassandra to deliver a powerful open-source big data analytic solution. *A big thank you to Comcast for hosting! Hope to see you all there. About Tim Berglund: Tim is a teacher, author, and technology leader with DataStax, where he serves as the Director of Training. He can frequently be found at speaking at conferences in the United States and all over the world. He is the co-presenter of various O’Reilly training videos on topics ranging from Git to Mac OS X Productivity Tips to Distributed Systems, and is the author of Gradle Beyond the Basics. He tweets as @tlberglund, blogs very occasionally at http://timberglund.com (http://timberglund.com/), and lives in Littleton, CO, USA with the wife of his youth and their youngest child.

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  • Cassandra Summit 2015 Live Stream

    Online

    Link to Livestream (9/23/2015) at 11AM: http://www.datastax.com/ CASSANDRA SUMMIT 2015 Brought to you via Live Stream! As we know you don't want to miss out on this year's Cassandra Summit, for those of you who won't be able to make their way to Santa Clara, CA we are going to live stream some of the sessions from Cassandra Summit 2015 for you! All you need to do is click on the link we are going to post here on the 22nd of September and follow the steps to the live stream on the 23rd! What will be streamed? • Keynote: • Billy Bosworth, CEO • Jonathan Ellis, Apache Cassandra Project Chair, DataStax co-founder & CTO • Scott Guthrie, Executive Vice President, Cloud and Enterprise, Microsoft • 6 sessions: • Full session's schedule to come! You can sign up from your own computer at the comfort of your home or office, however, you have the option to actually Meet up and share the experience with other members of this group or your colleagues! If you wish to meet up and you have a venue to host the members of the group who wish to get together just let me know at [masked] and we can discuss sponsorship of food, drinks etc (If you have more than 15 people attending). Please let me know before the 11th of September so that we can get it all setup and inform the group of the place etc. Looking forward to sharing this experience with you all!

  • Avoiding the Pit of Despair: Event Sourcing with Akka and Cassandra

    For this meetup we are excited to be joined by Luke Tillman, Evangelist for Apache Cassandra at DataStax. What You'll Learn At This Meetup: Avoiding the Pit of Despair: Event Sourcing with Akka and CassandraWith Akka you take a complicated system and break it down into lots of smaller units (actors) that communicate by passing messages. A single actor system can easily scale to millions or tens of millions of actors running on many machines. As actors process messages, they build up internal state, and many times we want that state persisted somewhere. In this talk, we'll dive into the event sourcing API used to persist actor state in Akka and talk about how we build a data model to support it in Cassandra. At first, the data model seems pretty straightforward, but the more we dig in, the more we see that a couple of classic Cassandra anti-patterns are pushing us close to the Pit of Despair. We'll come up with a way to avoid these problems so we can go on building distributed systems happily ever after with Akka and Cassandra. About Luke Tillman: Luke is an Evangelist for Apache Cassandra at DataStax, with a focus on the developer community. He's spent most of the last 15 years writing code for web applications built on relational databases both large and small. Most recently, before living the glamorous life of an Evangelist at DataStax, he worked as a software engineer at Hobsons on systems used by hundreds of colleges and universities across the U.S. and the World. Parking & Building Instructions: * There is plenty of paid parking around the building * Comcast is located on the 5th floor. Please wait in the lobby and Trevor or someone else from the Comcast team will be there to escort you upstairs * Food and drinks will be served, hope to see you all there! * Big thank you to Trevor and the rest of the Comcast team for hosting and to Datastax for sponsoring food+drinks, swag and the presenter!

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  • Long Term Road Test of C*

    Gnip

    For this meetup, we are excited to be joined by Kavika Vollmar, Staff Engineer at Twitter, as well as Chris Romary, Senior Software Engineer at Twitter. Chris and Kavika will be discussing their ongoing road test of Cassandra, and some things they've learned along the way. What You'll Learn At This Meetup: We have been running a C* cluster in production with more than 20 nodes in EC2 for almost 1 year. We use v-nodes on EBS and we have learned quite a bit about what to do and what to avoid in order to reduce the ongoing operational support of our cluster. The cluster holds currently 5TB of data with average 4600 writes/sec (max of 18000 writes/sec). The read load is usually around 1100 reads/second (max of 3100 reads/sec). *Building Instructions: The front doors to the office lock at 6PM. If you arrive later than that please find the doors on the south side of the building in the alley next to the bike stands and knock.(There are also doors at the south-east corner, but please ignore those) *Food and drinks will be served, hope to see you all there! *Big thank you to Gnip for hosting and speaking! About Kavika Vollmar: Kavika has 20 years of experience building enterprise scale applications. From the early days of J2EE to current NoSQL DBs he has seen a lot of technologies gain popularity and witness some of them stay around for a long time. Apart from Cassandra he has hands on experience with Redis, S3, SQL DBs of all flavours, HDFS, giving him a wide perspective on storage solutions. About Chris Romary: Chris has almost 20 years of professional software development experience. Much of that time has been spent moving around and transforming large volumes of data. He's built B2B and messaging systems that pull data from and push data to a wide array of databases and applications using more data formats than he cares to remember.

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  • Distributed Systems in One Lesson

    Comcast

    For this meetup we are excited to be joined by Tim Berglund, Global Director of Technical Enablement over at Datastax who will be discussing distributed systems. What You'll Learn At This Meetup: Normally simple tasks like running a program or storing and retrieving data become much more complicated when we start to do them on collections of computers, rather than single machines. Distributed systems has become a key architectural concern, and affects everything a program would normally do. Using a series of examples all set in a coffee shop, we’ll explore the unique problems and solutions that arise in distributed storage and distributed computation. About Tim Berglund: Tim is a teacher, author, and technology leader with DataStax, where he serves as the Director of Training. He can frequently be found at speaking at conferences in the United States and all over the world. He is the co-presenter of various O’Reilly training videos on topics ranging from Git to Mac OS X Productivity Tips to Apache Cassandra, and is the author of Gradle Beyond the Basics. He tweets as @tlberglund, blogs very occasionally at http://timberglund.com, and lives in Littleton, CO, USA with the wife of his youth and their youngest child. Parking & Building Instructions: * There is plenty of paid parking around the building * Please wait in the lobby and Trevor or someone else from the Comcast team will be there to escort you upstairs * Food and drinks will be served, hope to see you all there! * Big thank you to Trevor and the rest of the Comcast team for hosting and to Datastax for sponsoring food+drinks, swag and the presenter!

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  • DOSUG + Colorado Cassandra User Group Holiday Party.

    Due to the holidays, we decided to do things a bit different this month and join the Denver Open Source Users Group (DOSUG) for a joint holiday party! This is mainly a networking event for the community to come together and network, have a few drinks and light appetizers and enjoy the holiday season. We will be providing light appetizers and the host space (inTEA). There will be beer, wine, tea, tea cocktails and spiked tea available ranging from $3.75-$8 per drink. So if you want start off your holiday season in festive cheer come celebrate the holidays with us! Also a big thank you to the main sponsor: * Tim Berglund the organizer of the DOSUG group and Cassandra expert will be there to facilitate the event as well as be there to answer any questions you may have.

  • Lighting a Spark under Cassandra and Elasticsearch

    For this meetup we are excited to be doing a joint meetup with the Boulder/Denver Spark group! We will be joined by Chris Love, Apollobit Technical Founder . What You'll Learn At This Meetup: - Why we are using Spark - Cassandra Spark Integration - Elasticsearch Spark Integration - Manipulating large amounts of data in two large unrelated data stores. About Chris Love: Chris has 15 years of experience in enterprise software and user experience with great success in Big Data, Ad Serving, Enterprise Integration and Opensouce. His work with Internet Broadcasting was cited as; “continuing to keep the edge in the Internet broadcast industry through its unique broadcast and technical infrastructure”, by the DENVER BUSINESS WIRE. He has architected key projects with such companies as Accenture, Motorola, Johnson & Johnson, Micron, Sun Microsystems, ADP, Exactis, Intuit, Warner Bros, First Data, BEA, AT&T and Oracle. Chris is passionate about scalable open source technologies and the Apollobit platform is built on open source software, from the back-end to the front-end. Hope to see you all there!

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  • Cassandra Day Denver 2014

    Pearson Education: South Metro Denver Chamber of Commerce

    Cassandra Day Denver 2014 is a full-day meetup event based in Denver, CO dedicated to bringing both beginner and expert Cassandra users together to learn more about our favorite open source NoSQL database. RSVP today, as space is limited. You *MUST* register through: http://cassandradaydenver2014.eventbrite.com/?aff=DenverMeetup Thank you to the Pearson team for hosting! Hope to see you all there! *Please DO NOT try and RSVP here, you will be automatically waitlisted and it will not get you a ticket into the event. Please register through the link above. Thank You!

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