1. CUTS UNITE DSML for Dataflow Modeling By Pooja Varshneya

2. Component Workload Emulator (Coworker) Utilization Test Suite (CUTS)  CUTS is a framework comprising of various system execution modeling (SEM) and system trace analysis tools.  Enable system developers and tester to conduct system integration testing during the early stages of the software lifecycle.  Assists in locating and rectifying quality-of-service problems during development phase of DRE systems.  Facilitates continuous system integration testing throughout the software lifecycle.

3. CUTS

4. UNITE  UNITE is a system execution trace analysis tool.  Uses a dataflow model that is used to extract metrics of interest based for QoS evaluation.  Log messages are used to capture metrics of interests, such as time an event was sent or values of elements in an event.  Metrics of interest within the log messages are identified using message constructs.  QoS evaluation equation to applied to a dataflow model to evaluate QoS attributes, such as end-to-end response time, latency, and scalability.

5. EXAMPLE 1activating Login Component... 2Login Component receive request6 at 9567349456 3Validating username and password for request6 4Username and password is valid 5granting access at 9567349459 to request6 6... 7Deactivating the Login Component SQLite DB LF1: {STRING owner} receive request{INT reqid} at {INT recvtime} LF2: granting access at {INT replytime} to request{INT reqid} LF2.replytime – LF1.recvtime Evaluation Function Log Format LF1.reqid = LF2.reqid Relation

6. Need for DSML  As dataflow models increase in size in terms of number of log formats and relations amongst them, it becomes difficult for DRE developers to manage the complexity.  DSML provides an easy to use visual interface for creating dataflows.  Preserves the semantics of the language.  Enforces creation of valid relations between log formats by constraint checking.  Prevents duplication of dataflows.

7. CUTS UNITE DSML Unit TestsDatagraphs

8. CUTS UNITE DSML CUTS UNITE DSML Datagraphs can be defined as DM = (LF, CR, f)  A set LF of log formats that have variables V identifying what data to extract from log messages.  A set CR of causal relations that specify the order of occurrence for each log format such that C R i,j means LF i → LF j, or LF i occurs before LF j  A user-defined evaluation function f based on the variables in LF.

9. CUTS UNITE DSML CUTS UNITE DSML Unit Test can be defined as UT = (f a, f e, G, S)  f a is an aggregation function used to convert a data set to a single value.  Examples : AVERAGE, MIN, MAX, and SUM.  f e is an evaluation function used to evaluate log-format attributes.  For a given aggregation function f a, grouping G is used to identify data sets that should be treated independent of each other.  A Service S defines any external utility that can process the results generated by UNITE.  Examples : gnuplot

10. CUTS DSML Meta-Model

11. CUTS DSML Constraints View Connection.src (“Type”) == Connection.dst(“Type”)

12. DaDatagraph Example Log Format Relation Key

13. CUTS UNITE Interpreter  UDM based interpreter  Validates the models against XML schema definition.  Parses the datagraphs and unit tests to generate XML based configuration files .datagraph .unite  Uses Xerces DOM parser to create XML Document.

14. Interpreter Output UnitTest_Login.uniteDatagraph_Login.datagraph

15. Project Website http://www.dre.vanderbilt.edu/CUTS/

16. DEMO