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DYNDB027: Scalability warning

FieldValue
CodeDYNDB027
SeverityWarning

Message​

Entity '{0}' design may not scale well: {1}

Description​

Entity design should follow DynamoDB best practices for scalability. This diagnostic identifies patterns that may lead to hot partitions, uneven data distribution, or other scalability issues as data volume grows.

Example​

The following code triggers this diagnostic:

[DynamoDbTable("Events")]
public partial class Event
{
    [PartitionKey]
    [DynamoDbAttribute("pk")]
    public string Pk { get; set; } = string.Empty;

    [SortKey]
    [DynamoDbAttribute("sk")]
    public string Sk { get; set; } = string.Empty;

    [DynamoDbAttribute("data")]
    public string Data { get; set; } = string.Empty;
}
// Using a single static partition key value for all events

Fix​

The corrected version:

[DynamoDbTable("Events")]
public partial class Event
{
    [PartitionKey(Prefix = "EVENT")]
    [DynamoDbAttribute("pk")]
    [Computed("Category", "DateBucket", Separator = "#")]
    public string Pk { get; set; } = string.Empty;

    [SortKey]
    [DynamoDbAttribute("sk")]
    public string Sk { get; set; } = string.Empty;

    [Extracted("Pk", 0)]
    public string Category { get; set; } = string.Empty;

    [Extracted("Pk", 1)]
    public string DateBucket { get; set; } = string.Empty;
}