diff --git a/README.md b/README.md
index 007b0aa..86c21da 100644
--- a/README.md
+++ b/README.md
@@ -282,7 +282,7 @@ For instance, take into account the snaptshot above. If you already know how to
               * Streams
                 * [Redis Streams](https://www.youtube.com/watch?v=qXEyuUxQXZM) 📼 🆓
               * Sentinel
-                * [](https://www.youtube.com/watch?v=85HzpIk7Mq8)
+                * [Redis Sentinel in Nutshell](https://www.youtube.com/watch?v=85HzpIk7Mq8)
               * Cluster
                 * [Building for high availability and extreme performance with Redis cluster, AWS - Madelyn Olson](https://www.youtube.com/watch?v=LLxWu27qQTI) ⭐️ 📼 🆓
             * Monitoring
@@ -293,6 +293,9 @@ For instance, take into account the snaptshot above. If you already know how to
             * Hosted
               * ElastiCache
                 * [AWS re:Invent 2020: Design for success with Amazon ElastiCache best practices](https://www.youtube.com/watch?v=_4SkEy6r-C4) 📼 🆓
+                * [AWS re:Invent 2021 - Deep dive on Amazon ElastiCache for Redis - Groupon - DataTiering](https://www.youtube.com/watch?v=QEKDpToureQ)  📼 🆓
+                * Global Datastore - Cross-region replication (DR)
+                  * [Redis Global Datastore](https://aws.amazon.com/blogs/aws/now-available-amazon-elasticache-global-datastore-for-redis/) 📰 🆓
           * Cassandra
             * [Cassandra: Introduction by DATASAX](https://www.youtube.com/watch?v=B_HTdrTgGNs) 📼 🆓
             * [Cassandra at Instagram 2016](https://www.slideshare.net/DataStax/cassandra-at-instagram-2016) 📰 🆓
diff --git a/resources/topic-graph.mmd b/resources/topic-graph.mmd
index 3c69319..68955f2 100644
--- a/resources/topic-graph.mmd
+++ b/resources/topic-graph.mmd
@@ -62,6 +62,7 @@ graph TD
             Rd --> RdCls[Cluster]
             Rd --> RdSh[Sharding]
             Rd --> RdEC[ElastiCache]
+              RdEC --> RdECG[Global Datastore]
         NoSQL --> DoS[DocumentStore]
           DoS --> Mng[Mongo]
           DoS --> ES[ElasticSearch]
diff --git a/resources/topic-graph.png b/resources/topic-graph.png
index 10d455b..2bb8584 100644
Binary files a/resources/topic-graph.png and b/resources/topic-graph.png differ