Resiliency using Hystrix

Resiliency using Hystrix - A quick talk on Hystrix and how to utilize it to achieve resilient application architecture.

Transcript

1. Hystrix
   why resiliency?
   

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2. Agenda
   ❏ What is Resiliency?
   ❏ Why we need Resiliency?
   ❏ What is Hystrix
   ❏ Not a silver bullet
   ❏ How to use
   ❏ What you get and don’t
   ❏ What’s next
   

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3. What is Resiliency?
   Resiliency is the ability to provide and maintain an acceptable level of service in the face of
   faults and challenges to normal operation.” Threats and challenges for services can range
   from simple misconfiguration over large scale natural disasters to targeted attacks.
   

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4. Why we need Resiliency?
   

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5. What is Hystrix?
   Hystrix is a latency and fault tolerance
   library designed to isolate points of access
   to remote systems, services and 3rd party
   libraries, stop cascading failure and enable
   resilience in complex distributed systems
   where failure is inevitable.
   

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6. Not a silver bullet
   More like a Gauge &
   Circuit breaker,
   Rather than a
   pipeline,
   Certainly NOT the
   Thor’s Hammer
   

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7. public class CommandHelloWorld extends HystrixCommand {
   private final String name;
   public CommandHelloWorld(String name) {
   super(HystrixCommandGroupKey.Factory.asKey("ExampleGroup"));
   this.name = name;
   }
   @Override
   protected String run() {
   // a real example would do work like a network call here
   return "Hello " + name + "!";
   }
   }
   CommandHelloWorld.execute();
   How to use
   

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8. How to use
   

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9. How to use - Configurations
   Circuit Breaker
   ➔ circuitBreaker.enabled
   ➔ circuitBreaker.requestVolumeThreshold
   ➔ circuitBreaker.sleepWindowInMilliseconds
   ➔ circuitBreaker.errorThresholdPercentage
   ➔ circuitBreaker.forceOpen
   ➔ circuitBreaker.forceClosed
   Metrics
   ➔ metrics.rollingStats.timeInMilliseconds
   ➔ metrics.rollingStats.numBuckets
   ➔ metrics.rollingPercentile.enabled
   ➔ metrics.rollingPercentile.timeInMillisecond
   s
   ➔ metrics.rollingPercentile.numBuckets
   ➔ metrics.rollingPercentile.bucketSize
   execution.isolation.thread.timeoutInMilliseconds
   

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10. What you get and don’t
    ➔ Real-time Dashboard
    ➔ Circuit Breaker
    ➔ Auto Mark Up / Mark Down
    ➔ Highly Configurable
    ➔ Reduced Latencies
    ➔ Faster responses
    ➔ 100% availability
    ➔ Magic!!!
    

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11. What’s Next
    ➔ Aero Hystrix
    ➔ Use it for your dependencies
    ➔ Use the dashboard
    ➔ Checkout Turbine
    

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12. Questions?
    

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