Cassandra Day NY 2014: Using Spark Streaming for High Velocity Analytics on Cassandra
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A Tale of Two Technologies A Story of the IoT “revolution”
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0.) With each device comes an implicit contract with the end user: you give us the data, we give you the results. Now. Not tomorrow. Not even fifteen minutes from now. 1.) The flip side of getting data in real time is that users expect results in real time. 2.) In return for being wired into the internet 24x7 customers demand a similar level of responsiveness and even better availability. __ Spark Streaming and Cassandra form the ideal combination of high velocity CEP and analytics with a high velocity and always on database. Today’s solutions don’t scale to the Internet of tomorrow. The always-on nature of the emerging Internet of Things space means you need to process information at previously unseen scale and, more difficult, make sense out of that data. Cassandra is the leader in large scale, high velocity, time series data workloads. While the Hadoop world has been stuck with legacy “batch analytics” technology, Cassandra users have been increasingly focused on the “now”. Fast answers to easy questions about your data, at any velocity, and any scale. But Cassandra has always been weak on the “complex questions” problem. DataStax integrated with Hadoop to overcome this limitation, but it was always an awkward fit. Slow batch analytics on top of fast moving data really doesn’t do you much good. But Spark, and in this case, Spark Streaming, make high velocity streaming analytics at scale easier than ever, similar to how Cassandra pioneered high-velocity data management at scale. Hadoop is the right choice for batch analytics. Until recently, nobody really knew what the right solution is for real-time processing. We believe that Spark and Cassandra are the clear answer.
Transcript of Cassandra Day NY 2014: Using Spark Streaming for High Velocity Analytics on Cassandra
A Tale of Two Technologies
A Story of the IoT “revolution”
It was the age of connectedness
It was the age of disconnectedness
Failure tolerance is not optional
It was the age of wisdom
It was the age of foolishness
It was the epoch of complexity
Did you just tell me to go #@$#@$ myself?
It was the epoch of simplicity
We brought as much simplicity as we could to the menagerie known as Hadoop, but it’s still slow.
What is the Internet of Things?
“The Internet of Things (IoT) refers to uniquely identifiable objects and their
virtual representations in an Internet-like structure.”-Wikipedia
No really what is IoT?
● It’s literally the act of connecting “things” to the Internet
● It predates the World Wide Web● It shouldn’t be surprising to anybody
So IoT is old news?
Most definitely
So IoT is just hype?
Home security and automation
Fitness trackers
Your (driverless?) car
Medical devicesSensors
Industrial equipment
NO!
What is Cassandra?● A massively scalable distributed database● Chooses availability over strong consistency
(yes, that really is a fundamental tradeoff)● With its wide partitions it is able to take
advantage of data locality even at “web scale”
Chocolate!
What is Spark?● DAG is a logical superset of M/R● Adopts much of the Hadoop ecosystem,
without being bound by it● Intelligent use of caching (RDDs) for
massive performance gains● Incorporate Streaming to make ingestion-
time processing a first class citizen
Peanut butter!
What does IoT need from big data?
● Log time-series events -- at scale● Gather meaning from that data -- at scale● Report on that data -- at scale● Take action on that data -- at scale
Logging events at scale
Gathering meaning at scale
Reporting at scale● Canned reports● Ad-hoc querying and reporting● Drill down / exploratory ● Alerting● Aggregation● Clustering (K-means, et al)● Generalized machine learning
Take action at scale● Stateless application servers● Horizontally scaled and co-located with
Cassandra and Spark in each DC● Any platform with a CQL driver
The architecture...
Spark Streaming to Cassandra
Cassandra to Spark Streaming
Multi-DC
DC1 DC2
Write anywhere.
Things that go together
Things that go together
A Tale of Two Summits
![Chapter 1: Installing and Configuring Spark · Chapter 7: Structured Streaming with PySpark [ 60 ] [ 61 ] [ 62 ] ... Spark Drill Impala HBase Arrow Memory Parquet Cassandra Kudu Model](https://static.fdocuments.net/doc/165x107/5ec9185e5263de629b5d9d4a/chapter-1-installing-and-configuring-spark-chapter-7-structured-streaming-with.jpg)
