Persistence

    • never trust an uploaded file
    • verify that the filename is alphanumeric
    • the file could be a malicious executable
    • save the file in a cloud storage eg. S3
    • AWS S3
    • document DB
    • key-value DB
    • NoSQL databases support concurrency to scale performance

    Document DB

    • great fit for Node and JS
    • MongoDB is the leading document DB
    MongoDB DBaaS
    MongoDB npm packages
    • mongodb - low-level driver for MongoDB
    • mongoose - Object Document Mapper (ODM)
    • session-mongoose - to manage session storage

    Key-value DB

    Redis npm packages
    • connect-redis