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In this scenario there are three streams Person, Auction and Bid and stored information (Category). At every time, new users can register themself in the system and create new auctions. Each user can also generate bids for auction. The Schema can be found in the picture above.
As default: Each time a client connects new (to one of the four streams) a new simulation is started (with reproducable data). To get consisten data, connections to the other three streams, will use the same simulation. So e.g., if you connect to a person stream and have no other connections to the server, the simulation start from the beginning. If you connect to another stream, e.g., bid, and you are still connected to the person stream, the bid stream fits to the person stream. If you connect to the bid stream after you disconnected from the person stream, a new simulation will be started. This behavior can be changed with an start up optoin.
We adapted this scenario for Odysseus and allow to configure the scenario.
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java -Xms40m -Xmx512m -XX:+HeapDumpOnOutOfMemoryError -XX:+UseConcMarkSweepGC -XstartOnFirstThread -jar plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar --launcher.library plugins/org.eclipse.equinox.launcher.cocoa.macosx.x86_64_1.1.101.v20120109-1504 -console -clean -debug -nl en -data @noDefault -noExit -gcf /config/NEXMarkGeneratorConfiguration.properties -useNIO true -pr 65440 -Dosgi.requiredJavaVersion=1.5 -Dorg.eclipse.swt.internal.carbon.smallFonts |
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pr:This is the starting port of the first server (Auction). The next servers (PERSON, BID, CATEGORY) will get the next 3 ports.gcf:This parameter references a file that describes the behaviour of the nexmark server, e.g. how long is the delay between different elements in the stream. We deliver two standard configurations that can be found in the pluginde.uniol.inf.is.odysseus.nexmark:/config/NEXMarkGeneratorConfiguration_SLOW.properties: Here elements are delivered with a rather slow rate. This should be used when creating queries./config/NEXMarkGeneratorConfiguration.properties: Here elements are created with a higher rate. This can be used to test, if the application scales.
useGlobalGenerator: If this flag is set Nexmark will start the simulation with the first access from any client and resumes the simulation until the program is stopped explicity.
Nexmark Configuration File
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