I have my Old postgres database which is not a cloud based. And I want to migrate the data from the old database to new database which is in aws.
So can this be done via dblink or what is the other best practises to do this.
You can migrate DBs to AWS via AWS Database Migration Service. It's fully managed tool to help you move your data from on premises to AWS. You can read more about it here: https://aws.amazon.com/dms/?nc=sn&loc=1.
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We have a production postgresql db available only in glue catalog. What's the best practices to ETL some tables in this database and load the data into another postgresql instance in the same aws account?
This production database is our transactional db and we don't need most of it's tables. We already have some glue ETL's creating tables in S3 (so accessible via Athena) but the goal here is to load into another postgresql instance.
Thanks
I have deployed the Neo4j server on the AWS EC2 Ubuntu server instance. I have a certain amount of data on the AWS RDS Postgresql database which I would like to replicate on the graph DB used by the Neo4j application. My question is "Is there any way that U can replicate the data from my AWS Postgresql database onto my graph database?". Any help would be appreciated on this topic.
Check out Neo4j-ETL tool, it helps you to map your data-model from PostgreSQL DB to neo4j
https://neo4j.com/developer/neo4j-etl/
It seems migrating Postgres database using data directory is viable:
How To Move a PostgreSQL Data Directory to a New Location on Ubuntu 16.04
But in case of RDS because SSHing to the RDS is not possible I am here to ask if there is any way to speed up my Postgres database migration.
You could use the AWS Database Migration Service:
AWS Database Migration Service (AWS DMS) is a cloud service that makes it easy to migrate relational databases, data warehouses, NoSQL databases, and other types of data stores. You can use AWS DMS to migrate your data into the AWS Cloud, between on-premises instances (through an AWS Cloud setup), or between combinations of cloud and on-premises setups.
I want to understand AWS Relational Database Service (RDS) and discover benefits from using it.
Why RDS is better than manually installed PostgreSQL database in EC2 instance?
Is it possible to connent existing database in EC2 instance with Amazon RDS?
How it really works?
How I should automation RDS?
When I want create new database in existing EC2 instance I can use Ansible in simply way. How I should connect my application with database which uses RDS ?
Thanks in advance!
I want to understand AWS Relational Database Service (RDS) and discover benefits from using it.
As already commented, read the docs and whitepapers.
Why RDS is better than manually installed PostgreSQL database in EC2 instance?
you can be sure it is well setup, you will get point in time recovery, backups and high availability. As well you can set it up yourself, however using RDS you have it all already configured.
Ifs it possible to connent existing database in EC2 instance with Amazon RDS? How it really works?
you don't have access to any underlying configuration, so nope, you cannot really connect ec2 database w/ rds (e. g. wal for wal streaming).
you still can use database migration tools to migrate all databases and updates to or from rds
How I should automation RDS? When I want create new database in existing EC2 instance I can use Ansible in simply way.
you can use a cloudformation template or cli commands
How I should connect my application with database which uses RDS ?
when you create a rds instance, you will define an admin user and receive a connection url
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_VPC.Scenarios.html#USER_VPC.Scenario1
can I migrate from AWS RDS to standalone Postgres instance using AWS DMS?
I RTFM, but It does not state anywhere clearly If I can or not. In theory migration should be the same - create supporting scheme in RDS and move on. But have anyone done it?
Well, from AWS DMS manual:
AWS Database Migration Service (AWS DMS) can migrate your data to and from most widely used commercial and open-source databases such as Oracle, PostgreSQL, Microsoft SQL Server, Amazon Redshift, Amazon Aurora, MariaDB, and MySQL. The service supports homogeneous migrations such as Oracle to Oracle, and also heterogeneous migrations between different database platforms, such as Oracle to MySQL or MySQL to Amazon Aurora. The source or target database must be on an AWS service.
In your case the source is on an AWS service, and if by "standalone" you mean a PostgreSQL instance on EC2 machine, then your target is as well. So, based on that, then answer should be "yes".
Yes, that is possible. We have moved data from RDS Postgres to Postgres Installed on EC2 Instance using DMS and works great so far. Make sure to create endpoints for the source/target and create a replication instance and you are good to go