We're working hard every day to make Keboola Connection faster and minimize the time you spend waiting for your results. This effort includes a wide variety of components of the platform architecture. Some of the changes are straightforward and transparent to the end users, but others are unexpectedly complicated.
This is the case of transformations. We rolled out an update earlier this year and were forced to immediately rollback to the previous version as it broke the data flow in a few projects. This time, we're more prepared. We have identified the source of the incompatibility, and we'll be rolling out the update silently, only for those projects that will not be adversely affected. The projects that would be affected will not be updated. Instead, they will be notified to take steps to fix the incompatibilities. Then they'll become eligible for the update as well.
Parallel output processing
In the original system, when all transformations in a phase are executed, the output processing starts. It takes all the transformations sequentially and processes the outputs one by one. The order of the executions is not defined, but it is predictable and, most importantly, it doesn't change between runs. Some projects rely on a specific order of output processing to achieve certain goals.
To speed up the output, we have decided to queue all outputs at once and let Storage handle all jobs as fast as possible. But, as you already may have noticed, this mean the transformations can run in any order or even in parallel. This may affect the result of the output if you relied on a particular order.
Updating the project
The project overview and all affected transformations will notify you about multiple outputs being written to the same table in Storage. You will be easily navigated to the places that need to be fixed. Please contact our support if you need any help doing that.
Once you have fixed all instances where multiple outputs are written to the same table in your project, you can immediately contact us using the support button. We will turn on the update in your project. Or, wait until we update your project automatically (we're watching all projects regularly).
