e4cfc5af8a
## What changed? Change to send raw history blobs from history service to frontend service. History service returns a new proto message that has a repeated bytes history field. This response is wire compatible with the original response which has temporal.api.history.v1.History type for this field. This allows history service to not deserialize events from this data blob. This considerably reduces CPU usage. History service still needs event_id and version decoded from history events. For this we use a new proto message StrippedHistoryEvent which has these two fields only. It takes considerably less CPU to decode events to this struct. ## Why? We have seen incidents of high history CPU usage when large number of GetWorkflowExecutionHistory calls are made to workflows which has large history. With this change we can reduce the CPU burden on history service during this API call. ## How did you test it? Existing unit tests and manual test to run workflows. ## Potential risks ## Documentation ## Is hotfix candidate? No
Temporal
Temporal is a durable execution platform that enables developers to build scalable applications without sacrificing productivity or reliability. The Temporal server executes units of application logic called Workflows in a resilient manner that automatically handles intermittent failures, and retries failed operations.
Temporal is a mature technology that originated as a fork of Uber's Cadence. It is developed by Temporal Technologies, a startup by the creators of Cadence.
Learn more:
Getting Started
Download and Start Temporal Server Locally
Execute the following commands to start a pre-built image along with all the dependencies.
brew install temporal
temporal server start-dev
Refer to Temporal CLI documentation for more installation options.
Run the Samples
Clone or download samples for Go or Java and run them with the local Temporal server. We have a number of HelloWorld type scenarios available, as well as more advanced ones. Note that the sets of samples are currently different between Go and Java.
Use CLI
Use Temporal CLI to interact with the running Temporal server.
temporal operator namespace list
temporal workflow list
Use Temporal Web UI
Try Temporal Web UI by opening http://localhost:8233 for viewing your sample workflows executing on Temporal.
Repository
This repository contains the source code of the Temporal server. To implement Workflows, Activities and Workers, use one of the supported languages.
Contributing
We'd love your help in making Temporal great. Please review the internal architecture docs.
See CONTRIBUTING.md for how to build and run the server locally, run tests, etc.
If you'd like to work on or propose a new feature, first peruse feature requests and our proposals repo to discover existing active and accepted proposals.
Feel free to join the Temporal community forum or Slack to start a discussion or check if a feature has already been discussed. Once you're sure the proposal is not covered elsewhere, please follow our proposal instructions or submit a feature request.