Tale 1: Analyzing and Solving a 504 Gateway Timeout problem on AWS
A change in the way users used the system resulted in a downtimes of services caused by `504 Gateway Timeout` on the ELBs.
• What does that mean?
• What is causing it?
• And how to fix it?
This touches all layers of a project from DevOps and Infrastructure via understanding HTTP and TCP/IP networking and POSIX operating systems to proper resource handling in source code (in this case, Java).
The problem: 504 Gateway Timeouts
The analysis: From structure to tools how we found the culprit with system knowledge and systematic search
The solution - once more: Clean Code!
Tale 2: Migrating 190M records from DynamoDB and S3 to MongoDB
In one of our projects we had to migrate 190M records from DynamoDB and S3 to MongoDB.
In a live system.
This is the story of how we achieved that: how we did that, what went wrong along the way, and what we did about those things. This is about both, the migration script as well as the service reprogramming.
We welcome you to be a part of this exciting Meetup.
We will taking a break between the talks .
Coffee and snacks will be at Equal Experts!!
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