Help Center > > User Guide> DDS DB Instance Management (Development Tool)> Database Management> Collection Management> Creating a Collection

Creating a Collection

Updated at: Jun 09, 2021 GMT+08:00


You have logged in to a DDS DB instance and created a database.


  1. On the top menu bar, choose Database Management.

    Figure 1 Database list

  2. On the Collections tab page, click New Collection.

    Figure 2 Database management

  3. On the displayed page, enter the collection name. Select Capped collection, Auto index, and No padding as required.

    Figure 3 Creating a collection
    • Capped collection: Set the maximum number of bytes and the maximum number of documents. If the specified value is reached, an error is reported. The value specified must be greater than 0.
    • Auto index: Automatically create an index on the _id field.
    • No padding: A storage policy that does not reserve storage space for the growth of a record when inserting it.

  4. Enter the validation rule, and set Validation Level and Validation Action.

    Figure 4 Creating a collection-2
    • Options for Validation Level include:
      • strict: a strict validation level.
      • moderate: a moderate validation level.
      • off: no validation level.
    • Options for Validation Action include:
      • error
      • warn

  5. Ensure that all the settings are correct and click OK. The collection you create appears in the collection list, and you can perform operations on it.

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