TRADESTORM Inc. presents HATS: Highly Available Trading of Securities

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TRADESTORM Inc. presentsHATS Highly Available
Trading of Securities

• J. McIlvain, H. Phillips, Z. Wang
• Distributed Systems 45-612
• Information Networking Institute

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Introduction

• What is HATS
• Who would use HATS

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Objective

• Provide highly available service
• Failure tolerance primary back-up

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Implementation Tools

• Java
• RMI
• JDBC

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System Design

• Three tier model
• Client
• RMI servers LDS, TS
• Database MDB, TDB
• Market Engine

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Basic System Model
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Primary Back-up model
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Client Application
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Load Distribution Server

• Provides services to clients
• Registration, authentication
• Keeps information of each Trading Server
• Registration, state of TS...
• Keeps information on Databases
• Keeps information on Market Engines

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Trading Server

• On start up, must register with LDS
• Communicate with
• the Client Application
• the Databases
• When crash
• the clients are redistributed over all the TS

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Database

• Market Trade Database
• keeps market information
• updates by market engine
• Trader (Client Account) Database
• keeps clients personal information
• keeps portfolio information
• When crash, replace by back-up server

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Market Engine

• On start up, must register on LDS
• Periodically
• downloads web data
• updates the MDB
• When crash, back-up takes over as ME

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Discussion

• Highly available
• Failure tolerance