NoWog (Not only Workload Generator)

NoWog is a workload generator able to generate and execute customizable MongoDB workload based on a specific input format defined in doc/EBNF_gammar.txt.

NoWog consist of three parts:

1. Parser: use pyparsing to parse the BNF input. Parser result consist of ID of each rule, distribution and operation information.

2. Mapping: map the parser result into MongoDB command.

   This part use distribution.py to draw sampled from specified distribution. And use values.py to generate all random values in each command. Each rule will be mapped as a session, which consist of its ID and a execution time table.

3. Execution: execute all sessions. This part are also able to display histogram of specific type or IDs of workload.

Usage without scenarios:

1. Read and edit all settings in config.ini:

2. Run main.py with or without arguments:

   Example:

   • If run without any arguments, program will exit after generate (or write) sessions file.

     $ python main.py

   • Display workload histogram for all operations of all sessions.

     $ python main.py --show

   • Only run one operation in each session once, in order to test the correctness and runnability of the generated command.

     $ python main.py --try

   • Run all operations in all sessions under prearranged distribution.

     $ python main.py --run

Usage with scenarios:

1. Read and edit all settings in scenario.ini:

2. Run scenario.py without any arguments

Dependencies

Python version: higher than 2.7

MongoDB version: 3.2.1

Require modules:

• pymongo
• pyparsing