32 and 64-bit Systems

• R used to come in 32 and 64-bit versions
  • The last version to do both is 4.1.3
• 32-bit systems are limited to 4GB of RAM
  • This in turn limits R to ~3GB of RAM
• Some database connections require 32-bit R :(
  • It is possible to pretend 32 and 64-bit R gets along
    • You can use a system call to 32-bit R to run just the bits you need to be in 32-bit
    • Pass data between 32 and 64-bit by writing to data files of your choosing
    • This is not ideal