What is the recommended way to delete a large number of items from DynamoDB?

Question

I\'m writing a simple logging service in DynamoDB.

I have a logs table that is keyed by a user_id hash and a timestamp (Unix epoch int) range.

When a user of

Answer 1

My approach to delete all rows from a table i DynamoDb is just to pull all rows out from the table, using DynamoDbs ScanAsync and then feed the result list to DynamoDbs AddDeleteItems. Below code in C# works fine for me.

        public async Task DeleteAllReadModelEntitiesInTable()
    {
        List readModels;

        var conditions = new List();
        readModels = await _context.ScanAsync(conditions).GetRemainingAsync();

        var batchWork = _context.CreateBatchWrite();
        batchWork.AddDeleteItems(readModels);
        await batchWork.ExecuteAsync();
    }

Note: Deleting the table and then recreating it again from the web console may cause problems if using YAML/CloudFormation to create the table.