Session proposal: zero-downtime Gerrit upgrades

sessions/zero-downtime-upgrade.md

diff --git a/sessions/zero-downtime-upgrade.md b/sessions/zero-downtime-upgrade.md
new file mode 100644
index 0000000..979fac6
--- /dev/null
+++ b/sessions/zero-downtime-upgrade.md
@@ -0,0 +1,16 @@
+# Zero-downtime Gerrit upgrades
+
+How to upgrade a Gerrit production instance without pulling the plug.
+Even without having a fully redundant multi-master setup like Google
+it is possible to perform a full Gerrit upgrade without having to
+interrupt incoming traffic.
+
+Learn how GerritHub.io managed to:
+- upgrade its DB
+- migrate data-center from Europe to America
+- update Gerrit binaries and plugins
+- performed full reindex
+
+... and keeping its 100% availability at the same time.
+
+*Luca Milanesio,GerritForge*