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A FHIR® Store with internal, fast CQL Evaluation Engine


The goal of this project is to provide a FHIR® Store with an internal CQL Evaluation Engine which is able to answer population wide aggregate queries in a timely manner to enable interactive, online queries.


A demo installation can be found here (user/password: demo).


Blaze is widely used in the Medical Informatics Initiative in Germany and in Biobanks across Europe. A 1.0 version is expected in the next months.

Latest release: v0.28.0

Quick Start

In order to run Blaze just execute the following:


docker volume create blaze-data
docker run -p 8080:8080 -v blaze-data:/app/data samply/blaze:latest

Blaze will create multiple directories inside the blaze-data volume on its first start and use the same directories on subsequent starts.

Please refer to Deployment for the full documentation.



Pull requests are welcome. Please consider the development documentation before creating one.

YourKit Profiler

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The developers of Blaze uses the YourKit profiler to optimize performance. YourKit supports open source projects with innovative and intelligent tools for monitoring and profiling Java and .NET applications. YourKit is the creator of YourKit Java Profiler, YourKit .NET Profiler and YourKit YouMonitor.


Copyright 2019 - 2024 The Samply Community

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.