add datafusion
diff --git a/_posts/2021-04-12-ballista-donation.md b/_posts/2021-04-12-ballista-donation.md
index d07246b..43cc45c 100644
--- a/_posts/2021-04-12-ballista-donation.md
+++ b/_posts/2021-04-12-ballista-donation.md
@@ -35,6 +35,8 @@
The foundational technologies in Ballista are:
- [Apache Arrow](https://arrow.apache.org/) memory model and compute kernels for efficient processing of data.
+- [Apache Arrow DataFusion](https://github.com/apache/arrow/tree/master/rust/datafusion) query planning and
+ execution framework, extended by Ballista to provide distributed planning and execution.
- [Apache Arrow Flight Protocol](https://arrow.apache.org/blog/2019/10/13/introducing-arrow-flight/) for efficient
data transfer between processes.
- [Google Protocol Buffers](https://developers.google.com/protocol-buffers) for serializing query plans.
