## Amazon DynamoDB Construct Library
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Here is a minimal deployable DynamoDB table definition:
```python
# Example may have issues. See https://github.com/aws/jsii/issues/826
import aws_cdk.aws_dynamodb as dynamodb
table = dynamodb.Table(self, "Table",
partition_key=Attribute(name="id", type=dynamodb.AttributeType.STRING)
)
```
### Keys
When a table is defined, you must define it's schema using the `partitionKey`
(required) and `sortKey` (optional) properties.
### Billing Mode
DynamoDB supports two billing modes:
* PROVISIONED - the default mode where the table and global secondary indexes have configured read and write capacity.
* PAY_PER_REQUEST - on-demand pricing and scaling. You only pay for what you use and there is no read and write capacity for the table or its global secondary indexes.
```python
# Example may have issues. See https://github.com/aws/jsii/issues/826
import aws_cdk.aws_dynamodb as dynamodb
table = dynamodb.Table(self, "Table",
partition_key=Attribute(name="id", type=dynamodb.AttributeType.STRING),
billing_mode=dynamodb.BillingMode.PAY_PER_REQUEST
)
```
Further reading:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.ReadWriteCapacityMode.
### Configure AutoScaling for your table
You can have DynamoDB automatically raise and lower the read and write capacities
of your table by setting up autoscaling. You can use this to either keep your
tables at a desired utilization level, or by scaling up and down at preconfigured
times of the day:
Auto-scaling is only relevant for tables with the billing mode, PROVISIONED.
```ts lit=test/integ.autoscaling.lit.ts
const readScaling = table.autoScaleReadCapacity({ minCapacity: 1, maxCapacity: 50 });
readScaling.scaleOnUtilization({
targetUtilizationPercent: 50
});
readScaling.scaleOnSchedule('ScaleUpInTheMorning', {
schedule: appscaling.Schedule.cron({ hour: '8', minute: '0' }),
minCapacity: 20,
});
readScaling.scaleOnSchedule('ScaleDownAtNight', {
schedule: appscaling.Schedule.cron({ hour: '20', minute: '0' }),
maxCapacity: 20
});
```
Further reading:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/AutoScaling.html
https://aws.amazon.com/blogs/database/how-to-use-aws-cloudformation-to-configure-auto-scaling-for-amazon-dynamodb-tables-and-indexes/
### Amazon DynamoDB Global Tables
Please see the `@aws-cdk/aws-dynamodb-global` package.
aws-cdk.aws-dynamodb-1.17.0.tar.gz （15个子文件） 
aws-cdk.aws-dynamodb-1.17.0 
setup.cfg 38B README.md 2KB PKG-INFO 4KB src aws_cdk.aws_dynamodb.egg-info 
dependency_links.txt 1B PKG-INFO 4KB SOURCES.txt 458B top_level.txt 8B requires.txt 141B aws_cdk aws_dynamodb _jsii aws-dynamodb@1.17.0.jsii.tgz 81KB __init__.py 265B __init__.py 97KB py.typed 1B MANIFEST.in 23B pyproject.toml 110B setup.py 1KB资源评论
