diff --git a/Choosing-a-Filer-Store.md b/Choosing-a-Filer-Store.md
new file mode 100644
index 0000000..c904f71
--- /dev/null
+++ b/Choosing-a-Filer-Store.md
@@ -0,0 +1,10 @@
+Here is a list of common questions about choosing a filer store.
+
+## Cassandra vs ScyllaDB vs others
+
+Cassandra and ScyllaDB are distributed, having native support for TTL.
+
+The data structure is the same for Cassandra and ScyllaDB. If a directory has too many updates, there would be corresponding number of tombstones if the SSTable compaction did not kick in. Too many tombstones would slow down the queries.
+
+This happened in one user where “/tmp” folder is used as a staging folder for all uploaded files, the read operations becomes slower and slower for this folder. Changing to redis with [[Path-Specific-Filer-Store]] for this folder resolved this performance issue.
+
diff --git a/_Sidebar.md b/_Sidebar.md
index 948aac9..dcd1337 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -25,6 +25,7 @@
   * [[Filer Redis Setup]]
   * [[Super Large Directories]]
   * [[Path-Specific Filer Store]]
+  * [[Choosing a Filer Store]]
 * Advanced Filer Configurations
   * [[Migrate to Filer Store]]
   * [[Add New Filer Store|Customize Filer Store]]