I would like to know what is the background database that AWS AppSync uses to store data on the cloud? I didn't find this info in documentation.
Thanks.
AppSync currently supports Amazon DynamoDB, Amazon Elasticsearch, and AWS Lambda. With AppSync, you attach existing AWS resources to your API as "data sources" and then use AppSync resolvers to connect your GraphQL API to the underlying data source. For ease of use, AppSync also provides a feature that helps you deploy a DynamoDB table with the same shape as a type in your schema and will automatically register the data source and wire it up with resolvers on your behalf.
One of the great features of GraphQL is that it provides a single, unified protocol through which you can talk to any number of backend systems and AppSync embraces that philosophy.
Hope this helps.
Related
AWS AppSync allows to query directly from DynamoDB. Is the same possible for ElastiCache (Redis)
If I have a requirement to fetch the data from ElastiCache as it is without any further business logic, For Clients (say Android Apps) Is reading via a REST Service (for Security reasons etc) the only way or can AWS App Sync be used.
Based on the reference AWS Blog (dated 2019) , AWS App Sync can't read from Elasti Cache directly. https://aws.amazon.com/blogs/mobile/integrating-aws-appsync-neptune-elasticache/ . Would like to confirm if this has changed in recent times.
I have a couchbase installation onpremise and the same data at real time needs to be replicated to AWS Document DB, what are the possible approaches?
Can Synch Gateway help?
You can use Couchbase's Kafka connector for that (https://github.com/couchbase/kafka-connect-couchbase). Basically, it allows you to listen to all document changes in CB and push it to third party systems.
I work in a company that's using Serverless to build cloud-native applications and services. Today we use DynamoDB and SQL Databases with AWS Aurora.
We want to go with DocumentDB for our next application, but we could not find anything about Serverless and AWS DocumentDB. Does Serverless support AWS DocumentDB? If not, is there any plans to support it in the future?
Serverless supports any AWS resources that you can define using CloudFormation. As per the Serverless docs here:
Define your AWS resources in a property titled resources. What goes in
this property is raw CloudFormation template syntax, in YAML...
The YAML for creating a DocumentDB cluster is, going to look something like:
resources:
Resources:
DBCluster:
Type: "AWS::DocDB::DBCluster"
DeletionPolicy: Delete
Properties:
DBClusterIdentifier: "MyCluster"
MasterUsername: "MasterUser"
MasterUserPassword: "Password1234!"
DBInstance:
Type: "AWS::DocDB::DBInstance"
Properties:
DBClusterIdentifier: "MyCluster"
DBInstanceIdentifier: "MyInstance"
DBInstanceClass: "db.r4.large"
DependsOn: DBCluster
You can find the other CloudFormation resources that you can define in the resources parameter of your Serverless.yaml here.
DocumentDB is not a serverless service. You need to manage the backend server to use it.
Please refer to this blog: https://blogs.itemis.com/en/serverless-services-on-aws, you can see it is not in the list of "SERVERLESS SERVICES ON AWS".
No, this won't support serverless, if you really want this you can go with DynamoDB. Also, can see differences if you want.
DocumentDB
MongoDB is supported in this database, which provide ease to learn
Stored procedures are needed in this, where data retrieval and data accumulation is done with help
Document size is limited to 16MB and storage is maximized up to 64TB of data.
Daily backups are managed by the database itself, and can be recovered whenever required
This is costly as we require paying around $200/month even if the user uses only some instances of database or only used few hours.
AWS is not involved in the user credentials stored area as that will be stored in DB directly
Available in specific regions
Can be easily migrated out of AWS into any MongoDB
In case of primary node failure, service promotes read-replica to primary. Multi A-Z has to be configured by users. Backup can be copied across regions
DynamoDB
MongoDB is not directly supported i this and even not easy to migrate from MongoDB to DynamoDB
Stored procedures are not needed in this, which makes the process easier for users
There is no limit in the document size as it can be scaled up to the size of user requirements
Daily backups are not available which makes the user too backup the data which triggered explicitly by users, and can be recovered whenever needed
There is initial cost associated with this, but overall cost is less. Also, on-demand pricing is available where user manage with the lesser amount of $1/month. 25GB data is provided for free in first stage.
AWS controls the user access to the database through identity and access management where authentication and authorization is needed for low level as well
Available in all regions
Can not be easily migrated out of AWS into any MongoDB, you need to write a code to transform
Support global tables, which protect users against regional failure. Data is automatically replicated across multiple AZs in a single region.
Actually I am not very familiar with Dynamodb and I would like to launch a NoSQL database with local Dynamodb (downloadable version) but not hosted on amazon AWS. I would appreciate it if someone could let me know is it possible to make such a clustered or does downloadable version of Dynamodb support to be cluster locally ?
You can very easily run DynamoDB locally, but it only supports running a single instance—not a cluster. It's intended to be used for local testing/debugging.
DynamoDB is provided as a hosted service. Does not exist a DynamoDB code that you can download and install to use as a host or service provider.
As part of SDK for a lot of languages, AWS Team developed some wrappers that permits you to execute local versions of DynamoDB to test your particular code. These wrappers respect the DynamoDB API contract. In that case you can code to the DynamoDB interface and get the responses like it were hosted in AWS environment. But you can't host any database or even serve data as a service using this solutions.
I have read that you can replicate a Cloud SQL database to MySQL. Instead, I want to replicate from a MySQL database (that the business uses to keep inventory) to Cloud SQL so it can have up-to-date inventory levels for use on a web site.
Is it possible to replicate MySQL to Cloud SQL. If so, how do I configure that?
This is something that is not yet possible in CloudSQL.
I'm using DBSync to do it, and working fine.
http://dbconvert.com/mysql.php
The Sync version do the service that you want.
It work well with App Engine and Cloud SQL. You must authorize external conections first.
This is a rather old question, but it might be worth noting that this seems now possible by Configuring External Masters.
The high level steps are:
Create a dump of the data from the master and upload the file to a storage bucket
Create a master instance in CloudSQL
Setup a replica of that instance, using the external master IP, username and password. Also provide the dump file location
Setup additional replicas if needed
Voilà!