AMIS OOW Review 2012 - Deel 5 Coherence - Paco van der Linden
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Coherence provides an in-memory data grid that offers high performance, scalability, and availability. It uses a peer-to-peer architecture with automatic cluster management. Coherence provides ACID transactions across the distributed grid. Future enhancements will simplify configuration and management, integrate with WebLogic, and add capabilities like cache persistence and federated caching across data centers.
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AMIS OOW Review 2012 - Deel 5 Coherence - Paco van der Linden
- 1. COHERENCE
- 2. COHERENCE – INTRO Problem Domain of Coherence: High load, stateful middle tier services using shared services • Service Clients • Scale naturally • Browsers, application clients, mobile apps, other consumers. • Service / Application Implementation • Stateful • High load • Custom apps, BPM processes, service bus endpoints, … • Shared Services • Complex / Expensive to scale • RDBMS, cloud services, supplier and partner services, mainframe applications, and so on.
- 5. COHERENCE – IS POWERFUL • In Memory Data Grid • Peer to Peer • High Availability • Extreme performance • Linear scaling • Parallel querying • Automatic cluster management • New / failed node detection • Automatic / transparent failover • Automatic load balancing • Super robust transactions • ACID guarantees • Including grid-based processing • Even when servers are being removed / added
- 6. COHERENCE – IS EASY • Associate a ContactId with a Contact in the cache: cache.put(contactId, contact); • Retrieve the Contact associated with a ContactId from the cache: contact = (Contact) cache.get(contactId); • Remove mapping of ContactId to Contact from the cache: cache.remove(contactId); • Find all contacts who live in Massachusetts. Set setResults = cache.entrySet(ff.createFilter("homeAddress.state = 'MA'")); “The world's most expensive hash map”
- 7. COHERENCE – IN THE CLOUD • Part of Oracle Cloud Application Foundation
- 9. COHERENCE – NEAR FUTURE (12C)
- 10. COHERENCE – NEAR FUTURE (12C)
- 11. COHERENCE – NEAR FUTURE (12C) • Solves the “stale cache” problem • Applications updating DB outside Coherence • Leverages existing technologies • Golden Gate & TopLink Grid • No programming
- 12. COHERENCE – NEAR FUTURE (12C) • Fully integrated in WebLogic infrastructure • A Coherence container similar to EJB, JMS and JCA • Management through Configuration Wizard, WebLogic Console, WLST, JMX, Enterprise Manager • Simplified Operations Management • Configure, manage and deploy Coherence from the WebLogic Console • Manage Coherence resources centrally • Grid Archive (GAR) • Consolidates Coherence application and configuration into a single distributable entity • Can be packaged in WebLogic EAR
- 13. COHERENCE – NEAR FUTURE (12C) • One programming model for all events • Triggers • Backing Map Listeners • Partition Listeners • Cache Stores • Formalizes programming semantics for event driven architectures • Declarative configuration • Simplified but powerful
- 14. COHERENCE – NEAR FUTURE (12C) • Facilitate programmatic configuration and extension • Enable dynamic runtime configuration • Moving towards removing XML requirement to construct configuration • Fully documented approaches for extension
- 15. COHERENCE – NEAR FUTURE (12C) • Decouples backup operations from application’s interaction with the data grid • ~40-50% reduction in request latency • Speed vs consistency guarantees Synchronous Backups Asynchronous Backups
- 16. COHERENCE – NEAR FUTURE (12C) • Common Fusion Middleware install, patching and upgrade technology • Oracle Universal Installer (OUI) • OPatch
- 17. COHERENCE – WITH EXALOGIC • Optimizations for Exabus • Dramatically increases availability Exabus
- 19. COHERENCE – FUTURE • Cache Persistence • Backup of cached data on disk (Local Disk and/or SAN) • Recovery from disk during cold start and after simultaneous node failure • Federated Caching • Cross Data Center Data Management • Distribute updates from one to one/many other data grids.
- 20. COHERENCE – IS THE FUTURE • Important product for Oracle • Part of Cloud Application Foundation • Customers demand “Google-like” performance • Integration with everything • Lazy man’s path to: • Stability • Performance
Editor's Notes
- Use CaseCreate a Coherence Application (GAR)coherence-application.xml, coherence-cache-config.xml, pof-config.xmlPackage GARGAR can also be packaged in WebLogic EAREstablish Coherence InfrastructureTiered topology (Application layer and Storage layer)Leverage Configuration Wizard, Console, WLST, FMWCDeploy GAR into Coherence InfrastructureConsole, WLST, FMWC, webLogic.DeployerCoherence services will be automatically startedMonitor Deployment and Cluster InfrastructureMultiple Topologies Supported- Coherence-only, Coherence/Java EE, Storage-enabled/storage-disabled, Coherence*Extend, Coherence*Web, etc