https://github.com/cloudacademy/dynamodb-globaltables

AWS DynamoDB Global Tables Demonstration
https://github.com/cloudacademy/dynamodb-globaltables

aws cloudacademy devops dynamodb global tables

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AWS DynamoDB Global Tables Demonstration

• Host: GitHub
• URL: https://github.com/cloudacademy/dynamodb-globaltables
• Owner: cloudacademy
• Created: 2020-03-09T04:59:56.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2022-03-08T08:22:07.000Z (over 2 years ago)
• Last Synced: 2024-04-14T07:42:42.112Z (7 months ago)
• Topics: aws, cloudacademy, devops, dynamodb, global, tables
• Size: 2.93 KB
• Stars: 12
• Watchers: 4
• Forks: 8
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# DynamoDB Global Tables Demostration

## Step 1

Create a new DynamoDB table named ```cloudacademy-courses```.

```

aws dynamodb create-table \

    --region us-west-2 \

    --table-name cloudacademy-courses \

    --key-schema AttributeName=courseid,KeyType=HASH \

    --attribute-definitions AttributeName=courseid,AttributeType=S \

    --billing-mode PAY_PER_REQUEST

```

## Step 2

Load course data into the ```cloudacademy-courses``` table.

```

aws dynamodb batch-write-item --region us-west-2 --request-items file://./batch.course.data1.json

```

## Step 3

Update the ```cloudacademy-courses``` table and make it a global table with a new replica in the ```ap-southeast-2``` (Sydney) region.

```

aws dynamodb update-table \

    --region us-west-2 \

    --table-name cloudacademy-courses --cli-input-json  \

'{

  "ReplicaUpdates":

  [

    {

      "Create": {

        "RegionName": "ap-southeast-2"

      }

    }

  ]

}'

```

## Step 4

Check to see if the ```cloudacademy-courses``` global table is ready in the ```ap-southeast-2``` region.

**Note**: Wait 1-2 minutes before running this command to give the previous command enough time to propagate the table updates across to the new region.

```

aws dynamodb describe-table \

    --region ap-southeast-2 \

    --table-name cloudacademy-courses

```

## Step 5

Setup 30 second watch on the ```cloudacademy-courses``` global table deployed in the ```ap-southeast-2``` region - and query the ```TableStatus``` attribute. Wait for it to reach ```Active``` status.

**Note**: This command leverages the [jq utility](https://stedolan.github.io/jq/) to query the json data response for the ```TableStatus``` attribute

```

watch -n 30 "aws dynamodb describe-table \

    --region ap-southeast-2 \

    --table-name cloudacademy-courses \

    | jq -r .Table.TableStatus"

```

## Step 6

Start up ```tmux``` and split the terminal. 

**Pane 1**: Run the following command to query for a new record which we will load in the second tmux pane.

```

watch -n1 "aws dynamodb get-item --region ap-southeast-2 --table-name cloudacademy-courses --key '{\"courseid\" : {\"S\" : \"6666666\"}}'"

```

**Pane 2**: Load the new data set into the ```cloudacademy-courses```. Observe how long it takes before the results show up in the other tmux pane.

```

aws dynamodb batch-write-item --region us-west-2 --request-items file://./batch.course.data2.json

```