The document discusses a linearly scalable application architecture using a space-based approach. It proposes utilizing a single logical space to share data, logic, events, and services. Objects interact through the space and can be co-located with data/events for faster results. Services are deployed and managed in an adaptive and fail-safe way. As more processing units are added, the total throughput of the application scales linearly. This architecture provides benefits such as reduced latency, parallel processing, and a real-time service-oriented architecture (SOA) for stateful applications.

1. No More Hops: Towards a linearly scalable application infrastructure. Owen Taylor Blog: http://www.jroller.com/owentaylor

4. Database-Based Architectures: scaling bottlenecks Data – I/O overhead, Contention Messaging – Complex workflows increase latencies Processing – CPU, Parallelization Silo approach, each tier has its own clustering model, lots of moving parts

5. Another Way of Looking at It: A Tightening Bottleneck Static Web Thousands of (concurrent) connections Web App Hundreds of connections Business components Dozens of connections Database Several connections

6. Typical SOA model based on ESB Services can be Java, C++, .Net Content-Based Routing Most ESB solutions do not address stateful services and often use a centralized database to share state between services

10. Parallel Processing: Divide and Scale out Request Feed Proxy Request Request Request Proxy Proxy Proxy Write Write Write Service1 Service2 Service3 Partitioned Spaces Request: Zoom-in update stocks where … Proxy Virtual Table

11. Colocation: Dramatically Reduce Latency Request Feed Proxy Request Requests Request Proxy Write Write Write Partitioned Spaces Request: Zoom-in Proxy Virtual Table update stocks where …

12. Example: Algorithmic Trading Client Registration Offer Driver Execution Engine Write Notify Register Matching Engine Update Average Latency ~14 milliseconds (+ ~2 milliseconds for backup)

13. Reduced Latency Due To Colocation Offer Driver Execution Engine Write Notify Matching Engine Average Latency ~600 microseconds (+ ~2 milliseconds for backup) Client Registration Register Update Write [TradingStrategy]

14. [Demo] Excel With a Grid Backbone: RTD topic GSC 1 Embedded Space Processing Unit 1 StockConverter Spring Bean GSC 2 Embedded Space Processing Unit 2 GSC 3 Embedded Space Processing Unit 3 One Logical Space (Partitioned) GSC 4 Space Proxy Processing Unit 4 MarketFeed Spring Bean StockConverter Spring Bean StockConverter Spring Bean

16. SBA = Real-time SOA for Stateful Applications Services can be Java, C++, .Net Content-Based Routing Shared state to enable stateful services

17. Declarative Spring-SBA - Making Scalability Even Simpler Declarative Abstraction Space Bus Validation Service Service Bean Matching Service Service Bean Take Write Notify Space Bus Validation Service Service Bean Matching Service Service Bean Take Write Notify Take/Notify Write Take/Notify Write Polling Event Container Notify Event Container Polling Event Container Notify Event Container

18. Reaching Scalability with Space Based SOA Write Take Read Write Notify

19. Order Processing Demo: Logical Workflow Write new Orders (Feed) Client Accounting BrokenOrderCleaner Logistics Take Orders(new) Write Orders (approved) Take Orders (approved) Write Orders (shipped) Take Orders (shipped, unshipped, unapproved) Write new Orders (once cleaned) OrderSystem

20. Linearly Scalable OrderProcessing: Deploy Once: GSC 1 Space Proxy Processing Unit 1 orderfeed Spring Bean GSC 2 Embedded Space Processing Unit 2 ordersystem Spring Bean

21. Linearly Scalable OrderProcessing: Deploy Again: GSC 1 Embedded Space Processing Unit 1 ordersystem Spring Bean GSC 2 Embedded Space Processing Unit 2 ordersystem Spring Bean GSC 3 Embedded Space Processing Unit 3 ordersystem Spring Bean One Logical Space (Partitioned) GSC 4 Space Proxy Processing Unit 4 orderfeed Spring Bean The throughput of the application grows linearly as the number of ordersystem deployments increase.

26. Questions Please? Thank You! http://www.jroller.com/owentaylor