Method and apparatus for simulating a computer network system through collected data from the network

• US 5,761,486 A
• Filed: 04/29/1996
• Issued: 06/02/1998
• Est. Priority Date: 08/21/1995
• Status: Expired due to Term

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Nakagawa, Takashi, Watanabe, Yutaka, Muraki, Yasuaki
• Primary Examiner(s): Teska, Kevin J.
• Assistant Examiner(s): Fiul, Dan
• Application Number:
  US08/638,771
• Time in Patent Office: 764 Days
• Field of Search: 395/500, 395/200.01, 370/252, 455/33.1, 379/14, 379/59, 364/578, 364/512
• US Class Current: 703/21
• CPC Class Codes: G06F 11/3457 Performance evaluation by simulation
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks

Abstract

A simulator apparatus collects communication information on a transmission line by a line information collecting module, extracts the communication information between a server and clients from the collected communication information by an information extracting module, and further discriminates the communication information necessary for a simulation on a protocol unit basis from the communication information and converts to a simulating procedure by a procedure converting module. A simulation processing module performs a simulating operation of the client for the server in accordance with a simulation definition file of the simulating procedure and operating conditions and stores an operating situation to a performance log file.

Claims

1. An apparatus for simulating a computer network system to which a plurality of units are connected through a transmission line and which performs a communicating process between an arbitrary transmitting source unit and a reception destination unit in accordance with a predetermined communication protocol, comprising:

a line information collecting module collecting communication information on said transmission line and storing said communication information into a first communication recording file;

a communication information extracting module extracting communication information matching a predetermined transmitting source, a reception destination, and a protocol identifier indicative of transaction contents from the communication information collected by said line information collecting module and stored in said first communication recording file, and storing said extracted communication information into a second communication recording file;

a procedure converting module determining the communication information necessary for a simulation which is matched with designated conditions from the communication information extracted by said communication information extracting module and converting to a simulating procedure, said procedure converting module;

a. forming an initialization processing module of the simulating procedure and writing said initialization processing module into a simulating procedure file, reading said communication information from said second communication recording file, and determining whether a header exists in said communication information,

b. determining a time difference between the communication information from any prior communication information which was previously read out and the communication information which has been read out in step (a) if said header exists, and if the time difference exists, writing a time wait command into said simulating procedure file,

c. obtaining a simulation command by decoding said header and writing said simulation command into said simulating procedure file, wherein said simulation command comprises at least one of a communication start, a transmission, a reception, and a communication end,

d. adding said data to said simulating procedure file if no header exists in the communication information and only data exists in said step (c), and

e. repeating the processes in said steps (a to d) until no further communication information exists, then, when a final communication information is found, forming an end processing module of the simulating procedure and writing the end processing module into said simulating procedure file, thereby forming a series of simulating procedures; and

a simulation processing module executing a communicating process in accordance with the simulating procedure converted by said procedure converting module.

2. An apparatus according to claim 1, wherein said procedure converting module forms said simulating procedure on a protocol unit basis.

3. An apparatus according to claim 1, wherein said procedure converting module has an edition processing module for correcting contents of the information when the extracted communication information is converted to simulating procedure information.

4. An apparatus according to claim 3, wherein said edition processing module forms a simulating procedure for a plurality of transmitting source units, as targets, for a specific reception destination unit on the basis of the converted simulating procedure.

5. An apparatus according to claim 3, wherein said edition processing module converts a file format of said simulating procedure to a file format which can be recognized by the user and, after that, corrects said file format and converts to the original file format after the correction.

6. An apparatus according to claim 3, wherein said edition processing module corrects intervals of one of a transmission time and a reception time in the simulating procedure before the correction and forms a simulating procedure for allowing a plurality of transmitting source units to simultaneously execute the simulating operations.

7. An apparatus according to claim 1, wherein the simulating procedure formed by said procedure converting module has a file structure of a simulation initialization processing module, a simulation communicating module, and a simulation end processing module, and said simulation communicating module arranges a simulation command and simulation command data based on the communication information collected from said transmission line between simulation control information at the start and end of the communication.

8. An apparatus according to claim 1, wherein said simulation processing module has a simulation defining module for defining simulator operating conditions and executes a communicating process with the reception destination unit on the basis of the simulator operating conditions defined by said simulation defining module and the simulating procedure converted by said procedure converting module.

9. An apparatus according to claim 8, wherein said simulation defining module changes the simulator operating conditions as necessary.

10. An apparatus according to claim 9, wherein said simulation defining module defines at least the number of transmitting source units which are simulated by the simulation, a unit name of the reception destination unit by the simulation, and a unit name of a simulator machine as simulator operating conditions.

11. An apparatus according to claim 10, wherein said simulation defining module defines a unit name of the unit itself as a unit name of the simulator machine.

12. An apparatus according to claim 11, wherein said simulation defining module further defines a unit name of another simulator machine provided for an external module as a unit name of the simulator machine.

13. An apparatus according to claim 10, wherein, said simulation defining module further defines a log file name, a simulator variable value, and an automatic execution command as simulator operating conditions.

14. An apparatus according to claim 13, wherein said automatic execution command defined by said simulator defining module is generated at a predetermined timing and provides a previously defined simulation operating situation to the simulator apparatus and to another unit connected through the lines, and controls an execution.

15. An apparatus according to claim 14, wherein as said automatic command, at least a simulation start command, a communication start command, a communication end command, and a simulation end execution command are defined.

16. An apparatus according to claim 1, wherein said simulator processing module comprises a simulator control module forming one or a plurality of group control modules on a transaction unit basis and activates said group control module, said group control module comprises a terminal control module and forms one or a plurality of transmitting source units simulating as simulators by an activation of said terminal control module, and said terminal control module provides said simulating procedure to said transmitting source unit, thereby allowing the simulating operation to be executed.

17. An apparatus according to claim 16, wherein in the case where a plurality of simulating procedures are obtained on a protocol unit basis, said simulator control module forms said group control module every simulating procedure and simultaneously executes the simulations of a plurality of transactions.

18. An apparatus according to claim 16, wherein in the case where the simulating procedures of a plurality of transactions are obtained by a conversion of a specific protocol, said simulator control module forms said group control module every simulating procedure and simultaneously executes the simulations of a plurality of transactions.

19. An apparatus according to claim 16, wherein when a plurality of names of the transmitting source units which operate as simulators are defined in addition to an own unit by said simulation defining module, said simulator control module forms said group control module to a plurality of units including the own unit and activates said group control module.

20. An apparatus according to claim 19, wherein said simulator control module sets the self module to a master, sets the group control module formed in the transmitting source unit in the outside to a slave, and activates them through said transmission line.

21. An apparatus according to claim 16, wherein the transmitting source unit module provided for said group control module records an operating situation each time a command of said simulating procedure is executed.

22. An apparatus according to claim 1, wherein said simulation processing module has a monitor control module for displaying a simulator operating situation in a real-time manner.

23. An apparatus according to claim 1, wherein said simulation processing module has a log control module for recording the simulator operation and forming log information.

24. An apparatus according to claim 23, wherein said simulation processing module has a performance collecting module for collecting and analyzing a system performance on the basis of the log information formed by said log control module and providing.

25. An apparatus according to claim 1, wherein said transmitting source unit is a client machine and said reception destination unit is a server machine.

26. An apparatus according to claim 1, wherein said transmitting source unit is a terminal machine and said reception destination unit is a host machine.

27. A method simulating a computer network system to which a plurality of units are connected via a transmission line and which performs a communicating process between an arbitrary transmitting source unit and a reception destination unit in accordance with a predetermined communication protocol, comprising:

a line information collecting step of collecting communication information on said transmission line and storing said communication information into a first communication recording file;

a communication information extracting step of extracting communication information matching a predetermined transmitting source, a reception destination, and a protocol identifier indicative of a transaction contents from the communication information collected by said line information collecting module and stored in said first communication recording file, and storing said extracted communication information into a second communication recording file;

a procedure converting step of determining the communication information necessary for a simulation which is matched with designated conditions from the communication information extracted by said communication information extracting step and converting to a simulating procedure; and

a simulation processing step of executing a communicating process in accordance with the simulating procedure converted by said procedure converting steps,

wherein in said procedure converting step comprises the steps of;

a. forming an initialization processing module of the simulating procedure and writing said initialization processing module into a simulating procedure file, reading said communication information from said second communication recording file, and determining whether a header exists in said communication information,

b. determining a time difference between the communication information from any prior communication information which was previously read out and the communication information which has been read out in step (a) if said header is determined to exist, and if the time difference exists, writing a time wait command into said simulating procedure file,

c. obtaining a simulation command by decoding said header and writing said simulation command into said simulating procedure file, wherein said simulation command comprises at least one of a communication start, a transmission, a reception, and a communication end,

d. adding said data to said simulating procedure file if no header exists in the communication information and only data exists in said step (c), and

e. repeating the processes in said steps (a to d) until no further communication information exists, then, when a final communication information is found, forming an end processing module of the simulating procedure and writing the end processing module into said simulating procedure file, thereby forming a series of simulating procedures.

28. A method according to claim 27, wherein in said procedure converting step, said simulating procedure is formed on a protocol unit basis.

29. A method according to claim 27, wherein said procedure converting step has an edition processing step of correcting contents of the information when the extracted communication information is converted to simulating procedure information.

30. A method according to claim 29, wherein in said edition processing step, a simulating procedure for a plurality of transmitting source units, as targets, for a specific reception destination unit is formed on the basis of the converted simulating procedure.

31. A method according to claim 29, wherein in said edition processing step, after a file format of said simulating procedure was converted to a file format which can be recognized by the user, said file format is converted to the original file format after the correction.

32. A method according to claim 29, wherein in said edition processing step, intervals of one of a transmission time and a reception time in the simulating procedure before the correction are corrected and a simulating procedure for allowing a plurality of transmitting source units to simultaneously execute the simulating operations.

33. A method according to claim 27, wherein the simulating procedure formed by said procedure converting step has a file structure of a simulation initialization process, a simulation communicating process, and a simulation end process, and in said simulation communicating process, a simulation command and simulation command data based on the communication information collected from said transmission line are arranged between simulation control information at the start and end of the communication.

34. A method according to claim 27, wherein said simulation processing step has a simulation defining step of defining simulator operating conditions, and a communicating process with the reception destination unit is executed on the basis of simulator operating conditions defined by said simulation defining step and the simulating procedure converted by said procedure converting step.

35. A method according to claim 34, wherein in said simulation defining step, the simulator operating conditions are changed as necessary.

36. A method according to claim 35, wherein in said simulation defining step, at least the number of transmitting source units which are simulated by the simulation, a unit name of a reception destination by the simulation, and a unit name of a simulator machine are defined as simulator operating conditions.

37. A method according to claim 36, wherein in said simulation defining step, a unit name of the unit itself is defined as a unit name of the simulator machine.

38. A method according to claim 37, wherein in said simulation defining step, a unit name of another simulator machine provided in the outside is further defined as a unit name of the simulator machine.

39. A method according to claim 36, wherein in said simulation defining step, a log file name, a simulator variable value, and an automatic execution command are further defined as simulator operating conditions.

40. A method according to claim 39, wherein said automatic execution command defined by the simulator defining step is a command which is generated at a predetermined timing and provides a previously defined simulation operating situation to a simulator apparatus itself and another unit connected through the line and controls execution.

41. A method according to claim 40, wherein in said simulator defining step, at least a simulation start command, a communication start command, a communication end command, and a simulation end command are defined as said automatic execution command.

42. A method according to claim 27, wherein said simulator processing step comprises a simulator control step, one or a plurality of group control steps are formed on a transaction unit basis and are activated in said simulator control step, said group control step comprises a terminal control step, and one or a plurality of transmitting source units for simulating as a simulator are formed by an activation of said terminal control step, and in said terminal control step, said simulating procedure is provided to said transmitting source unit, thereby allowing the simulating operation to be executed.

43. A method according to claim 42, wherein in said simulator control step, in the case where a plurality of simulating procedures are obtained on a protocol unit basis, said group control step is formed every simulating procedure and the simulations of a plurality of transactions are simultaneously executed.

44. A method according to claim 42, wherein in said simulator control step, in the case where the simulating procedures of a plurality of transactions are obtained by a conversion of a specific protocol, said group control step is formed every simulating procedure and the simulations of a plurality of transactions are simultaneously executed.

45. A method according to claim 42, wherein in said simulator control step when a plurality of names of the transmitting source units which operate as simulators are defined in addition to an own unit by said simulation defining step, said group control step is formed in a plurality of units including the own unit and said group protocol step is activated.

46. A method according to claim 45, wherein in said simulator control step, the self step is set to a master, the group control step formed in the transmitting source unit in the outside is set to a slave and is activated through said transmission line.

47. A method according to claim 42, wherein the transmitting source unit provided for said group control step records the operating situation each time a command of said simulating procedure is executed.

48. A method according to claim 43, wherein in said simulation processing step, the simulator operating situation is displayed in a real-time manner.

49. A method according to claim 43, wherein in said simulation processing step, the simulator operation is recorded and log information is formed.

50. A method according to claim 49, wherein in said simulation processing step, a system performance is collected and analyzed on the basis of said log information and is provided.