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SimpleDB

SimpleDB is a multi-user transactional database server written in Java. Its architecture is explained in detail in the book Database Design and Implementation. This project aims to implement SimpleDB using C++20.

Implementation Plan

  • File Manager
  • Log Manager
  • Buffer Manager
  • Recovery Manager
  • Concurrency Manager
  • Transaction Manager
  • Schema, Layout
  • Record Page, Table Scans
  • Metadata Manager
  • Select Scans, Project Scans, Product Scans
  • Query Parser
  • Query Planner
  • JDBC Interfaces
  • Static Hash Indexes
  • Btree Indexes
  • Materialization and Sorting
  • MultiBuffer Sorting/Product
  • Query Optimization

Backlog:

  • Unit tests:
    • Query planner (need JDBC)
    • index - need JDBC (IndexRetrieval, IndexUpdate)
    • index/query (IndexJoin, IndexSelect)
  • Bugs:
    • bugs in GetIndexInfo of IndexManager

Optimization Plan

  • Log Manager:
    • Log Manager and Log Iterator currently allocate their own memory page, change the implementation to use buffers from the buffer pool instead
  • Buffer Manager:
    • Keep a mapping from each block to the buffer holding that block (instead of a sequential scan)
    • Use a more clever buffer replacement strategy
  • Recovery Manager:
    • The recovery algorithm does not look at the current state of the database, making substantial number of unnecessary disk writes if the database is large

Build

Run the following commands to build the system:

$ mkdir build
$ cd build
$ cmake ..
$ cmake --build .

If you want to compile the system in debug mode, pass in the following flag to CMake:

$ cmake -DCMAKE_BUILD_TYPE=Debug ..
$ cmake --build .

If you want to compile the system in release mode, pass in the following flag to CMake:

$ cmake -DCMAKE_BUILD_TYPE=Release ..
$ cmake --build .