Python and DAX
Follow this procedure to run the Python sample application on your Amazon EC2 instance.
To run the Python sample for DAX
-
Install the DAX Python client using the
pip
utility.pip install amazon-dax-client
-
Download the sample program source code (
.zip
file).wget http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/samples/TryDax.zip
When the download is complete, extract the source files.
unzip TryDax.zip
-
Run the following Python programs. The first program creates an Amazon DynamoDB table named
TryDaxTable
. The second program writes data to the table.python 01-create-table.py python 02-write-data.py
-
Run the following Python programs.
python 03-getitem-test.py python 04-query-test.py python 05-scan-test.py
Take note of the timing information—the number of milliseconds required for the
GetItem
,Query
, andScan
tests. -
In the previous step, you ran the programs against the DynamoDB endpoint. Now run the programs again, but this time, the
GetItem
,Query
, andScan
operations are processed by your DAX cluster.To determine the endpoint for your DAX cluster, choose one of the following:
-
Using the DynamoDB console — Choose your DAX cluster. The cluster endpoint is shown on the console, as in the following example.
dax://my-cluster.l6fzcv.dax-clusters.us-east-1.amazonaws.com
-
Using the Amazon CLI — Enter the following command.
aws dax describe-clusters --query "Clusters[*].ClusterDiscoveryEndpoint"
The cluster endpoint is shown in the output, as in this example.
{ "Address": "my-cluster.l6fzcv.dax-clusters.us-east-1.amazonaws.com", "Port": 8111, "URL": "dax://my-cluster.l6fzcv.dax-clusters.us-east-1.amazonaws.com" }
Run the programs again, but this time, specify the cluster endpoint as a command line parameter.
python 03-getitem-test.py dax://my-cluster.l6fzcv.dax-clusters.us-east-1.amazonaws.com python 04-query-test.py dax://my-cluster.l6fzcv.dax-clusters.us-east-1.amazonaws.com python 05-scan-test.py dax://my-cluster.l6fzcv.dax-clusters.us-east-1.amazonaws.com
Look at the rest of the output, and take note of the timing information. The elapsed times for
GetItem
,Query
, andScan
should be significantly lower with DAX than with DynamoDB. -
-
Run the following Python program to delete
TryDaxTable
.python 06-delete-table.py
For more information about these programs, see the following sections: