SERVER-25084 added test for initial sync with many databases

1 files changed, 52 insertions, 0 deletions

diff --git a/jstests/slow1/initial_sync_many_dbs.js b/jstests/slow1/initial_sync_many_dbs.js
new file mode 100644
index 00000000000..61bdce80bc8
--- /dev/null
+++ b/jstests/slow1/initial_sync_many_dbs.js
@@ -0,0 +1,52 @@
+/**
+ * Runs initial sync on a node with many databases.
+ */
+
+(function() {
+    var name = 'initial_sync_many_dbs';
+    var num_dbs = 64;
+    var num_colls = 16;
+    var num_docs = 4;
+    var replSet = new ReplSetTest({
+        name: name,
+        nodes: 1,
+    });
+    replSet.startSet();
+    replSet.initiate();
+
+    var primary = replSet.getPrimary();
+    jsTestLog('Seeding primary with ' + num_dbs + ' databases with ' + num_colls +
+              ' collections each. Each collection will contain ' + num_docs + ' documents');
+    for (var i = 0; i < num_dbs; i++) {
+        var dbname = name + '_db' + i;
+        for (var j = 0; j < num_colls; j++) {
+            var collname = name + '_coll' + j;
+            var coll = primary.getDB(dbname)[collname];
+            for (var k = 0; k < num_docs; k++) {
+                assert.writeOK(coll.insert({_id: k}));
+            }
+        }
+    }
+
+    // Add a secondary that will initial sync from the primary.
+    jsTestLog('Adding node to replica set to trigger initial sync process');
+    replSet.add();
+    replSet.reInitiate();
+
+    replSet.awaitSecondaryNodes(10 * 60 * 1000);
+    var secondary = replSet.getSecondary();
+    jsTestLog('New node has transitioned to secondary. Checking collection sizes');
+    for (var i = 0; i < num_dbs; i++) {
+        var dbname = name + '_db' + i;
+        for (var j = 0; j < num_colls; j++) {
+            var collname = name + '_coll' + j;
+            var coll = secondary.getDB(dbname)[collname];
+            assert.eq(num_docs,
+                      coll.find().itcount(),
+                      'collection size inconsistent with primary after initial sync: ' +
+                          coll.getFullName());
+        }
+    }
+
+    replSet.stopSet();
+})();