What is our primary use case?
When I was working for at my previous organization, we wanted to bring stability to all our MySQL databases. As a DBA, at first, it was scary as I thought I would be out of a job, however, the RDS managed DB allowed me to focus more on optimization and less on administration. (both hardware and software).
When I was working at another organization we had a large amount of MySQL on-prem to manage. It required lots of time to set them up, monitoring, and maintain them. RDS really allowed us to remove all the painful administration parts.
How has it helped my organization?
Less time was spent maintaining MySQL. Having to configure each server and spinning up a new MySQL in RDS takes 10 to 15min. It's a huge time-saving in maintenance.
By using RDS, AWS takes care of the maintenance of the hardware and software updates. Being able to scale quickly or downsize with no impact is also great.
All of your databases are nicely organized under 1 interface; you have quick access to some monitors and Cloudwatch can be used to set up alerts based on thresholds and notify you.
Today, with Terraform, you can automate the full process of creating RDS servers, deprecating them, changing their size, adding a replica, etc.
What is most valuable?
Create Replicas. Being able to create a replica with just a few clicks is great. Setting replication before would require backup, restore, and synching replication.
Backups. The fact that you can take a snapshot of the database without impacting the server is great. In comparison, large backups could lock tables or take too long. Alternatively, you would have to use tools such as xtraDB backup. That requires lots of code and maintenance.
Change Size. Being able to change the size of an RDS MySQL instance is amazing. There's no need to provision new machines, setup replication, etc. It's all done for you.
What needs improvement?
The solution needs RDS Mysql support for both MySQL 8 and MariaDB.
The Performance Monitor they have is a little clanky, at least in regards to the UI.
I wish they had designed a better MySQL Monitoring solution. I personally like SolarWinds DPA.
The performance is not always as good as MySQL running on its own EC2 instance. I have done some benchmarks before between EC2 instances and RDS and EC2 were better.
Being unable to select Out-file is annoying. They do support select Out-files into S3 but only on Aurora. It would be nice if they had implemented that feature in RDS MySQL.
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For how long have I used the solution?
I've been using AWS RDS for more than 8 years.
What do I think about the stability of the solution?
MySQL RDS is very stable. I cannot say that running MySQL on-premise or on EC2 instances is less stable than RDS MySQL. However, when there are hardware issues, if you have RDS MySQL standby "on", you'll appreciate the fail-over solution.
What do I think about the scalability of the solution?
MySQL RDS can scale very well. I have been using it in critical Production services.
How are customer service and support?
AWS Customer Support is pretty good. Their response time is usually adequate. They offer different support options and provide different support media (for example, phone, web, and email).
Which solution did I use previously and why did I switch?
I was using MySQL on-prem. I decided to switch due to the amount of time required to maintain on-premises databases.
How was the initial setup?
The initial setup is fairly straightforward. There is some tuning that needs to be done with RDS. The default settings are not always adequate.
What about the implementation team?
We handled the implementation in-house.
What's my experience with pricing, setup cost, and licensing?
Make sure you provision your MySQL RDS properly. Don't over or under-provision.
Perform some benchmarks before migrating. Migrating to a new system is costly. You don't want to have your data migrated only to realize it performs much worse than before.
Which other solutions did I evaluate?
I did not evaluate other options. I did evaluate Aurora, however, for the project requirements, it was not needed.
What other advice do I have?
RDS MySQL (and Postgres) are great managed database services. AWS provides a large range of database instance sizes from micro to very large machines. RDS can scale, and creating Replicas is very easy to accomplish.
If you're unsure if you should start using RDS or not, I suggest you consult with a MySQL RDS DBA or Data Architect who has used RDS for several years before making a decision.
Which deployment model are you using for this solution?
Private Cloud
If public cloud, private cloud, or hybrid cloud, which cloud provider do you use?
Amazon Web Services (AWS)
Disclosure: My company does not have a business relationship with this vendor other than being a customer.