DDS Scalability: One size fits all??..
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1 DDS Scalability: One size fits all??.. For OMG RTE-workshop, July 2007 Hans van t Hag, OpenSplice DDS product Manager hans.vanthag@prismtech.com
2 Agenda 1 INTO THE MOOD A paradigm shift CRITICAL INFRASTRUCTURES The Data is the Network A MODEL For DDS applicability DDS APPLICABILITY One size fits all??... DDS USECASE Work in Progress... CONCLUSION Wait & See...
3 INTO THE MOOD
4 3 C H J G K F B E I A L N U T V R M P Q S Z Y X W D A B C E F G H I J K L M N O P Q R S T U V W X Y Z D DDS BACKBONE Into the mood: Client/server vs. Pub-sub: A mind-shift
5 CRITICAL INFRASTRUCTURES
6 ARMS (Doug Schmidt): R&D Challenge 5
7 Net-centricity: The Data Is The Network 6 DoD Chief Information Officer, Network and Information Integration, Nov 05
8 DDS: a Fielded concept, suitable for mission-critical systems CHARACTERISTICS CHARACTERISTICS Many Many different different customers: customers: Many Many different different ships/missions: ships/missions: Large-scale Large-scale & & mission-critical: mission-critical: Real-time Real-time and and Fault-tolerant: Fault-tolerant: fielded fielded in in over over Navies Navies world-wide world-wide tens tens of of Ships Ships classes classes (patrol (patrol boats boats to to destroyers) destroyers) >150 >150 CPU s, CPU s, >2200 >2200 applications, applications, >4.000 >4.000 tracks/sec tracks/sec Battle-damage Battle-damage resistant, resistant, deterministic, deterministic, reliable reliable 7
9 An Example: Naval Frigate Combat System 8 SMART-L APAR KH/SCOUT NAV. RADAR HELI APPR. RADAR VESTA APECS-3 ESM / ECM OFF LINE R/S SIRIUS TDS (2x) POS SYSTEM SHIP S REF. IRC IFF LINK 11 VESTA SRBOC CATV BUS TDLPP VEX/ RCP BTS OSD BTS OSD ATM NETWORK VIDEO INTERFACE CABINET LARGE SCREEN DISPLAY 1 LARGE SCREEN DISPLAY 2 VCR 1/2 SPARE FL. DECK TV CAMERA COMBAT INFORMATION CENTER STAFF ROOM BRIDGE COMMS ROOM TV CAMERA DEPARTMENT OFF. / OFF. QUARTERS ETC. WORKSTATION 01 WORKSTATION M COTS & SIGMA TYPE PROCESSOR PIOD / PTSU PRINTERS TORPEDO WEAPON SYSTEM MK32 MOD-9 (MK46) GIC- 127 MIC- MK41 MIC- MK41 INTEGRATED MACHINERY CONTROL SYSTEM CCC1 CCC2 COMMS NETWORK ATAS SPHERION + XBT / XSV + SURF. TEMP. REC. HARPOON GUN 127 MM 30 MM GUNS OFF LINE MK41 SM2 LAUNCHER GOALKEEPER Data-traffic: Programs: Data flows: >4.000 publications per second over the system-data bus programs allocated over 150 processors urgent & non-urgent data (latency), important & less-important data (priority)
10 A MODEL FOR DDS-APPLICABILITY
11 SYSTEM SCOPES Platform-centric systems Net-centric systems 10 Mission Computer Vehicle Management REQUIREMENTS Net-centric systems-of-systems
12 Information Grids in Net-Centric Operations (NCO) 11 Engagement Grid: Weapons Direction Combat Execution (CE) Awareness Grid: Common Tactical Picture Command & Control (CC) Planning Grid: Common Operational Picture Command Support (CS) NCO: NCO: Autonomous processes, based based upon upon ubiquitous information at at required QoS QoS
13 A MODEL FOR DDS APPLICABILITY 12 Realtime Soft System-of-Systems Planning/support grid Firm Net(work)-centric Awareness grid Hard Platform-centric Execution grid Scale Small Large Ultra-Large
14 MAIN CHARACTERISTICS 13 Realtime Soft INTEROPERABLE- Planning/support grid Firm EFFICIENT- Awareness-grid Hard DETERMINISTIC- Execution-grid Scale Small Large Ultra-Large
15 EXAMPLES 14 Soft Realtime Planning Military: : Mission planning Civil: : Emergency Response Awareness Firm Military: : Track-Management Civil: : SCADA control systems Execution Hard Military: : AAW fire control Civil: : Process control Scale Small Large Ultra-Large
16 INFORMATION ARTEFACTS (Mil. Example) 15 Soft Realtime Planning Multimedia/Hypertext Documents Mission Objectives Firm Hard Engagement orders & Cues Execution Awareness Tracking information Timed orders Observations Repository Information Engagement status Mission Status Scale Small Large Ultra-Large
17 TECHNOLOGIES 16 Soft Realtime WEB COTS HW & SW Databases, GIS Classification/Encryption Firm Hard LAN WAN STATIC LAN WS & Embedded HW/OS TIMED-IO IO Hierarchical LAN s Enterprise SMP machines Ad-hoc networks Link/Radio Internet, satellite Scale Small Large Ultra-Large
18 SYSTEM REQUIREMENTS 17 Soft Realtime Planning Security COTS (DBMS/Web) integration Awareness COTS interoperability Firm Throughput performance Dependability & Availability Execution Tactical interoperability Hard End-to to-end Latency & Jitter Safety & Fault-tolerance tolerance Scale Small Large Ultra-Large
19 DDS-APPLICABILITY
20 DDS SUITABILITY: FUNCTIONALS (Specification) 19 Soft Realtime INTEROPERABILITY IDL/CORBA XML?? SQL?? Firm EFFICIENCY & AVAILABILITY LATENCY_BUDGET FT DURABILITY IDL XML/JSON?? Hard DETERMINISM RELIABILITY TRANSPORT_PRIORITY OWNERSHIP/LIFELINESS Partitions / Domains Scale Small Large Ultra-Large
21 DDS SUITABILITY: NON-FUNCTIONALS (Implementation) 20 Realtime INTEROPERABILITY Soft Web-services gateway?? DBMS gateway?? Firm EFFICIENCY & AVAILABILITY Latency budget based packing Distributed/fault-tolerant tolerant durability COTS interoperability Hard DETERMINISM Info priority based network scheduling Safety & Fault-tolerance tolerance Footprint & RTOS support Common Information Models Scale Small Large Ultra-Large
22 DDS SUITABILITY: Standardization Challenges 21 Realtime INTEROPERABILITY Soft XML based API/topics DBMS: topic/table mapping Firm EFFICIENCY/SCALABILITY Shared subscriber caches User-defined storage-keys DBMS/Web-service integration RT-DETERMINISM Corba/RTJava integration Hard Priority-banding Traffic shaping Scale Small Large Ultra-Large
23 Use Case: OpenSplice. one size fits all???
24 USE-CASE: OpenSplice, Addressing the challenges 23 Realtime PLUGGABLE (GATEWAY) SERVICES Soft XML: topic-definition & API DBMS: topic/table mapping Firm IN-MEMORY (O)DBMS BASED CORE DLRL data management Shared/read-only caches User-defined/Dynamic keys - Soap-service: Tuner - DBMS-service: 2-way Hard RT NETWORK_SCHEDULER RT Priority-banding Traffic shaping (size/burst) Info-priority pre-emption emption - (Any) Corba integration: compilable C++ API) - (RT) Java: Pluggable JAVA API on C-core Scale Small Large Ultra-Large
25 USE-CASE: Creating & Deploying DDS-based systems 24 Deployment Development Monitor & Control (Tuner) Logging & Replay Configuration High-level Services Views & Editors Modeling- Plug-ins UML Information Modeling Application Modeling DDS-DSL Deployment Modeling S E C U R I T Y DDS API s C/C++/Java COHABITATION Corba/Java/Dbms Minimum Ownership Content- Persistence Subscription DCPS Dynamic XML-based API DLRL Middleware- Integration OMG-DDS Profiles Roundtrip- Engineering Remote-connect soap Webservice gateway Network Scheduler Fault-tolerant Durability DBMS Gateway Pluggable- Services Foundation & Framework Eclipse Enterprise (Windows, Solaris, Linux, AIX) Embedded (vxworks, QNX, LynxOS) Supported Platforms
26 CONCLUSION: One concept fits all, we re not there yet.. 25 Security for DDS (node-to-node and end-to-end, encryption available but no standard yet) Logging & Replay (following C4I standardization) Dynamic Topics (requirements: DDS-PSIG) UML-profile for DDS (joint submission with SPARX systems) Monitor & Control (Tuner) Logging & Replay Configuration High-level Services Views & Editors Modeling- Plug-ins UML Information Modeling Application Modeling DDS-DSL Deployment Modeling S E C U R I T Y DDS API s C/C++/Java Minimum Ownership COHABITATION Corba/Java/Dbms Content- Subscription Persistence DCPS Dynamic XML-based API DLRL Middleware- Integration OMG-DDS Profiles Roundtrip- Engineering OpenSplice Tuner & Remote-connect Soap Webservice gateway Network Scheduler Fault-tolerant Durability DBMS Gateway Pluggable- Services Foundation & Framework Eclipse Enterprise (Windows, Solaris, Linux, AIX) Embedded (vxworks, QNX, LynxOS) Supported Platforms ( Potential ) DDS-related Standardization Webservice gateway (available and used by OpenSplice Tuner, but no standard yet) Pluggable Discovery (for ultra-large/wan systems, Several European/US studies) Dynamic DBMS gateway (available, but IDL/table mapping not standardized)
27 .QUESTIONS.????? THANK YOU!!
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