DOCS-309 adding a stable link

Sam Kleinman · Sam Kleinman · commit f98c0ef19520 · 2012-09-04T19:32:26.000-04:00
diff --git a/source/administration/sharding-architectures.txt b/source/administration/sharding-architectures.txt
@@ -111,6 +111,8 @@ created subsequently, may reside on any shard in the cluster.
    databases and sharding, has nothing to do with the term
    :term:`primary` in the context of :term:`replica sets <replica set>`.
 
+.. _sharding-high-availability:
+
 High Availability and MongoDB
 -----------------------------
 
