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High Volume Web API Management with the WSO2 ESB
 

High Volume Web API Management with the WSO2 ESB

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In this webinar Paul Fremantle and Hiranya Jayathilaka describe how to use the WSO2 ESB to manage high volume Web APIs including REST and JSON

In this webinar Paul Fremantle and Hiranya Jayathilaka describe how to use the WSO2 ESB to manage high volume Web APIs including REST and JSON

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    High Volume Web API Management with the WSO2 ESB High Volume Web API Management with the WSO2 ESB Presentation Transcript

    • lean enterprise middleware
      High Volume Web API Management
      with WSO2 ESB
      Paul Fremantle, CTO and Co-Founder
      HiranyaJayathilaka, Associate Technical Lead
      © WSO2 2011. Not for redistribution.
    • WSO2 Offerings
      WSO2 Carbon
      On premise product platform
      Consistent products sharing the same OSGi core
      WSO2 Stratos
      A “Cloud-Enabled Application Platform” (CEAP)
      Multi-tenant, Elastic, Metered/Billed deployment
      An extension of the Carbon platform
      Same SVN code tree
      WSO2 StratosLive
      http://cloud.wso2.com
      A running Platform-as-a-Service (PaaS)
      An instance of Stratos
      © WSO2 2011
    • ForresterWaveTM ESB Q2 2011 - Leader
    • © WSO2 2011
      WSO2 ESB 4.0
    • WSO2 ESB Features
      The WSO2 Enterprise Service Bus offers:
      Easy configuration through an intuitive graphical interface
      Lean, high-performance design conserves resources through maximum efficiency.
      Built on the WSO2 Carbon OSGi platform: adding new capabilities as you need them is a snap.
      Integrates with your existing systems, with support for EDI, CSV, Files, FIX, HL7, SAP, JMS, etc
      Asynchronous architecture supports very high loads with fixed resources
      Routing, mediation and transformation are modular, extensible but provide most use-cases simply by sequencing built-in mediators
      Full support for SOAP/WS-* and REST
      © WSO2 2011
    • Key Features for High Volume Web API
      Load Balancing and Failover built-in
      Pluggable models can include affinity based LB
      Full REST Support (XML and JSON)
      Especially used in Mobile environments
      Can bridge into SOAP or other enterprise systems
      Message Relay Mode and Relay Transport
      Excellent performance for 100% streaming
      Priority Execution, Cache and Throttling
      Manage workloads within the ESB as well as throttle backend
      Cache content locally if appropriate
      Service Chaining
      Asynchronous lightweight orchestration
      © WSO2 2011
    • eBay Case Study – High Volume
      Requirements:
      “The solutions we were using no longer met our needs, so we considered whether to build a new internal system or to adopt third-party technology”, Abhinav Kumar, eBay
      Needed enhanced service mediation and orchestration capabilities
      Scalability and performance to sustain increasing loads
      Evaluation:
      eBay evaluated several industry leading hardware and software ESB solutions, looking at open source, commercially licensed ESBs and hardware
      Test production during 2009 holiday season proved that our system was rock solid
      1m messages/day with zero downtime, zero memory growth
      Results
      Shared-nothing architecture on RedHat Linux on x86 hardware
      Currently running at more than 1 billion messages / day
      Low resource utilization and flat memory usage
      The benefits
      “Using the WSO2 ESBs, we've been able to provide customers and partners with the quality experience they expect on eBay, even as our global customer base has grown,” Abhinav Kumar
      © WSO2 2011
    • Memory Usage at eBay
      © WSO2 2011
    • Deployment
      © WSO2 2011
    • Configuring for High Volume
      Operating System
      JVM
      ESB
      Management
      © WSO2 2011
    • Tuning the OS
      • Optimize core network settings for high throughput network activity
      • /etc/sysctl.conf
      • Increase the number of open file descriptors allowed by the OS
      • /etc/security/limits.conf
    • Tuning the JVM
      • Allocate sufficient memory for the heap
      • -Xms256m -Xmx2048m -XX:MaxPermSize=256m
      • Consider reducing the new ratio
      • -XX:NewRatio=n
      • Consider using the concurrent mark and sweep collector
      • -XX:+UseConcMarkSweepGC
      • Read more on JVM and GC tuning
      • http://wso2.org/library/articles/2010/11/taming-java-garbage-collector
    • Tuning the ESB
      • Configure transport thread pools
      • Configured through nhttp.properties file
      • IO dispatcher threads carry out network IO at the wire level
      • Recommended to have one IO dispatcher per CPU core
      • Server workers and client workers mediate the messages
      • More the merrier (But keep memory usage and load in mind)
    • Message Relay Mode
      • WSO2 ESB uses Apache AXIOM and the StAX API for processing XML
      • XML payloads are streamed through the ESB
      • Pull parsing model
      • But for pure routing, load-balancing and header-only mediation we can avoid even this step
      • Message relay mode works around this glitch and enables 100% pure streaming of messages
      • Works regardless of size and format of messages
    • Enabling Message Relay
      • Enable the binary relay builder (axis2.xml)
      • Instructs the ESB to stream the incoming messages through without touching their payloads
      • Enable the expanding message formatter (axis2.xml)
      • Allows the ESB to send messages that were received through the binary relay builder
      <messageBuildercontentType="application/xml" class="org.wso2.carbon.relay.BinaryRelayBuilder"/>
      <messageFormattercontentType="application/xml" class="org.wso2.carbon.relay.ExpandingMessageFormatter"/>
      • Above configuration tells the ESB to process all application/xml messages in message relay mode.
    • HTTP Relay Transport
      • Brand new in WSO2 ESB 4.0 release
      • Non blocking HTTP transport implementation specially designed for streaming messages
      • Doesn’t require the binary relay builder and expanding formatter
      • To enable, simply uncomment the relevant entries in the axis2.xml file
    • Error Handling
      • In a large scale, high throughput deployment, errors are not unusual – Expect the unexpected
      • Configure endpoints to gracefully handle the common errors
      • Connection timeouts
      • Connection close/reset
      • Connection refused
      • HTTP protocol violations!!!!
    • More on Error Handling
      • Configure sequences to clearly log errors and if needed notify system administrators
      • In case the back end server fails to respond, send detailed fault responses to clients – Makes your application more appealing to the customers
      • Pay attention to HTTP error codes
    • Monitoring
      • In general keep an eye on:
      • CPU usage
      • Memory usage
      • Thread counts
      • Fault counts
      • Latency/Response time
      • Active connections
    • Monitoring Tools
      • Utilities Provided by OS
      • top
      • netstat
      • Mediation statistics
      • JMX Clients
      • Jconsole
    • Connections
      © WSO2 2011
    • Endpoints
      © WSO2 2011
    • Latency
      © WSO2 2011
    • Listeners
      © WSO2 2011
    • Memory and Garbage Collection
      © WSO2 2011
    • S2S Latency
      © WSO2 2011
    • Threads
      © WSO2 2011
    • Questions?
      28
      http://www.flickr.com/photos/oberazzi/
    • Resources
      http://wso2.com/landing/ebay-the-esb-casestudy/
      WSO2 ESB 4.0 Download and Library
      http://wso2.org/library/esb
      Message Relay Mode
      http://wso2.org/project/esb/java/4.0.0/docs/message_relay.html
      Twitter: @pzfreo
      Email: paul@wso2.comhiranya@wso2.com
      © WSO2 2011