I am new to AWS. I have a confusion which I want to figure out. My question is: Can we create multiple databases on a single Amazon RDS Aurora DB Instance? by simply connecting to the database engine using root credentials and querying "CREATE TABLE IF NOT EXISTS" command?
Hope I am much clear about my question. Further, Please guide if there is any other option to achive defined functionality.
TIA.
Based on the comments.
You create extra databases using SQL. Once you connect to your Aurora RDS, either MySQL or PostgreSQL, using mysql or psql clients (or other client), you can use SQL to create new databases:
MySQL: CREATE DATABASE Statement
PostgreSQL: CREATE DATABASE
Related
Earlier I was using Redis DB and in that, I have 8 databases set in the Redis conf file and I have a total of 8 databases named db0, db1, db2 ....db7.
recently I have created a new instance of memoryDB in AWS and in that redis config file i have set the database's value to 16 but I'm getting only db0 database rest are missing.
Can someone help how I can create the rest of the databases like db1 db2 to the same memory DB instance?
Thank you in advance.
Amazon MemoryDB for Redis (and Amazon ElastiCache for Redis in cluster-mode-enabled configurations) support DB0 only.
Am trying to create a proxy for my hana db which will be called from a lamda function to write to hana db.
I see MySQL and Postgres. is this only 2 supported.
Am new to Aws so could someone tell me how can this be achieved ?
No, AWS RDS proxy only currently supports MySQL and PostgreSQL database engines. There is no way around this.
We need to replicate data from an Amazon RDS (MySQL) databaes to an Aurora PostgreSQL database. Each database is on a different AWS account and region.
The data must be replicated in the PostgreSQL instance every 6 hours, so we need the guarantee that the data doesn't duplicate even if a field updated for a record.
Which method, tool, or design is better to do that? (Could be different to AWS.)
You could facilitate one of the following services provided by AWS:
Database Migration Service
Glue
The AWS Database Migration Service supports:
Using an Amazon-Managed MySQL-Compatible Database as a Source for AWS DMS
Using a PostgreSQL Database as a Target for AWS Database Migration Service
I created the RDS instance in AWS console, and I created the table and load the SQL script. Am I able to see the table and data for this RDS instance in AWS console?
No, you cannot see the RDS data (tables, rows, etc.) in the AWS Management Console.
To see the data, you'll need the appropriate client depending on the RDS engine type. Some examples:
MySQL: MySQL Workbench
SQL Server: SQL Server Management Studio
PostgreSQL: pgAdmin
Oracle: Oracle SQL Developer
It's possible to achieve, you can use AWS Glue - https://aws.amazon.com/blogs/big-data/how-to-access-and-analyze-on-premises-data-stores-using-aws-glue/
You can actually achieve this using the RDS query editor.
Type this command:
select * from information_schema.tables;
You will have to visually search for your tables here. Look through the "table_name" column until you can identify them. Every time I've used this command, the database tables I created were either listed first or very last. It's not a perfect way to do it, but it will usually suffice, and you don't need any extra services or software to achieve it.
You can use the QueryEditor to list the tables you've created using this SQL:
select * from information_schema.tables where TABLE_SCHEMA = 'name of your database goes here';
We are developing a Java/j2ee application which uses RDS.
We want to create a separate database per customer on a single RDS instance.
We want to create a template SQL schema with tables and some metadata.
When the new customer is created we want to clone the template schema and create a separate db for that customer.
Can you let me know if this is possible using AWS SDK APIs? Or if there is any other way?
Regard,
Dattatray.
The general design for handling individual databases for multi-tenant applications would be like
Have a separate DB for identification / allocation of specific database to a particular client [ Meta Data Database ]
During a launch / on-boarding of a new client, you need to fire the SQL snippet -> with a unique Client's DB name and have this information updated in the Meta Data Database
You can think of dynamically updating the SQL snippet DB NAME and then firing the Schema for the new client or use ORM like Hibernate to create the specified Database elements.
Amazon RDS doesn't impose any restrictions on number of Databases you can created in a single instance, so you need to worry about the upper limit. You do not need to use any of the AWS SDKs or APIs you just need to concentrate on the App and Connection Strings.
Extract from AWS FAQs for RDS :
Q: How many databases or schemas can I run within a DB Instance?
RDS for MySQL: No limit imposed by software
RDS for Oracle: 1 database per instance; no limit on number of schemas per database imposed by
software
RDS for SQL Server: 30 databases per instance
RDS for PostgreSQL: No limit imposed by software
You wouldn't need to use any SDK for RDS, as you are not really modifying the instance in any way. The instance will always be running, and you just want to create new database schemas on that instance. This would be done using the SQL connector library you are using in your Java code (or could be scripted in another language such as Perl or Python for example).