Update Uber case studies link
patch by Diogenese Topper; reviewed by Mick Semb Wever for CASSANDRA-18901
diff --git a/site-content/source/modules/ROOT/pages/case-studies.adoc b/site-content/source/modules/ROOT/pages/case-studies.adoc
index 3c7b20d..1439615 100644
--- a/site-content/source/modules/ROOT/pages/case-studies.adoc
+++ b/site-content/source/modules/ROOT/pages/case-studies.adoc
@@ -1409,12 +1409,12 @@
[discrete]
=== Uber
-Uber’s solution is comprehensive. They built their own system that runs Cassandra on top of Mesos. It’s all explained in a good talk by Abhishek Verma, Software Engineer at Uber: Cassandra on Mesos Across Multiple Datacenters at Uber (slides).
+Uber has been running an open-source Apache Cassandra® database as a service that powers a variety of mission-critical OLTP workloads for more than six years now at Uber scale, with millions of queries per second and petabytes of data.
[openblock, card-btn text-center]
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-http://highscalability.com/blog/2016/9/28/how-uber-manages-a-million-writes-per-second-using-mesos-and.html[Read More,window=_blank]
+https://www.uber.com/blog/how-uber-optimized-cassandra-operations-at-scale/[Read More,window=_blank]
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