[Website] Add Blog about Comet Donation

_posts/2024-02-27-comet-donation.md

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+---
+layout: post
+title: "Announcing Apache Arrow DataFusion Comet"
+date: "2024-02-27 00:00:00"
+author: pmc
+categories: [release]
+---
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+
+# Introduction
+The Apache Arrow PMC is pleased to announce the donation of the [Comet project],
+a native Spark SQL Accelerator built on [Apache Arrow DataFusion].
+
+Comet is an Apache Spark Accelerator that uses Apache Arrow DataFusion to
+accelerate Spark workloads. It is written in Rust and designed as a drop-in
+replacement for Spark's JVM based SQL execution engine and offers significant
+performance improvements for some workloads as shown below.
+
+```text
+   ┌─────────────────────────────────────────────────────────────────┐
+   │                                                                 │
+   │ ┌──────────┐ ┌────────────┐ ┌────────────┐       ┌────────────┐ │
+   │ │   SQL    │ │  Cluster   │ │  DAG/Task  │  ...  │  Executor  │ │
+   │ │ Planner  │ │  Manager   │ │ Scheduler  │       │            │ │
+   │ └──────────┘ └────────────┘ └────────────┘       └────────────┘ │
+   │                                                         │       │
+   └─────────────────────────────────────────────────────────────────┘
+     Spark (JVM Based)                                       │        
+                                  ┌ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─         
+
+                                  │                                   
+                                  ▼                                   
+                 ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓                   
+Comet Execution  ┃                                ┃                   
+Engine           ┃  ┌─────────────────────────┐   ┃                   
+(Native Code)    ┃  │ Apache Arrow DataFusion │   ┃                   
+                 ┃  └─────────────────────────┘   ┃                   
+                 ┃                                ┃                   
+                 ┃  ┌─────────────────────────┐   ┃                   
+                 ┃  │    Spark Compatible     │   ┃                   
+                 ┃  │  Expressions/Operators  │   ┃                   
+                 ┃  └─────────────────────────┘   ┃                   
+                 ┃                                ┃                   
+                 ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛                   
+```
+
+**Figure 1**: With Comet, users interact with the same Spark ecosystem, tools
+and APIs such as Spark SQL. Queries still run through Spark's mature and feature
+rich query optimizer and planner. However, the execution is delegated to Comet,
+which is significantly faster and more resource efficient than the  JVM based
+implementation.
+
+[Rust]: https://www.rust-lang.org/
+
+# Background
+
+Comet is one of a growing class of projects that aim to accelerate Spark using
+native columnar engines such as the proprietary [DataBricks Photon Engine] and
+the open source [Gluten project] and [Spark RAPIDS].
+
+Comet was originally implemented at Apple and the engineers who worked on the
+project are also significant contributors to Arrow and DataFusion. Bringing 
+Comet into the Apache Software Foundation will accelerate its development and 
+grow its community of contributors and users.
+
+[Comet project]: https://github.com/apache/arrow-datafusion-comet
+[Apache Arrow DataFusion]: https://arrow.apache.org/datafusion
+[DataBricks Photon Engine]: https://www.databricks.com/product/photon
+[Gluten project]: https://incubator.apache.org/projects/gluten.html
+[Spark RAPIDS]: https://github.com/NVIDIA/spark-rapids
+
+# Get Involved
+Comet is still in the early stages of development and we would love to have you
+join us and help shape the project. Here are some ways to get involved:
+
+* Learn more by visiting the [Comet project] page and reading the [mailing list
+  discussion] about the initial donation.
+
+* Help us plan out the [roadmap]
+
+* Try out the project and provide feedback, file issues, and contribute code.
+
+[mailing list discussion]: https://lists.apache.org/thread/0q1rb11jtpopc7vt1ffdzro0omblsh0s
+[roadmap]: https://github.com/apache/arrow-datafusion-comet/issues/19
+
+