diff --git a/delete-chunks.sh b/delete-chunks.sh
index 67ec349..e9ba0fc 100755
--- a/delete-chunks.sh
+++ b/delete-chunks.sh
@@ -1,12 +1,6 @@
 #!/bin/bash
 
 declare -a CHUNK_SERVERS=(
-  "lattice-10"
-  "lattice-11"
-  "lattice-12"
-  "lattice-14"
-  "lattice-16"
-  "boston" # clear the /tmp/menukaw dir of client
   "nashville"
   "denver"
   "boise"
@@ -26,13 +20,8 @@ declare -a CHUNK_SERVERS=(
   "cairo"
   "lima"
   "london"
-#  "salt-lake-city"
-#  "cheyenne"
-#  "helena"
-#  "lincoln"
-#  "nashville"
-#  "phoenix"
-#  "providence"
+  "loveland"
+  "steamboat"
 )
 
 for CHUNK_SERVER in "${CHUNK_SERVERS[@]}"
diff --git a/src/main/java/cs555/hw1/util/Constants.java b/src/main/java/cs555/hw1/util/Constants.java
index fddeb22..df6873e 100644
--- a/src/main/java/cs555/hw1/util/Constants.java
+++ b/src/main/java/cs555/hw1/util/Constants.java
@@ -22,9 +22,9 @@ public static class Client {
     public static class ChunkServer {
         public static final String CMD_LIST_CHUNKS = "list-chunks";
         public static final String CMD_GET_HOST = "get-host";
-        public static final int MAX_NODES = 20;
+        public static final int MAX_NODES = 30;
         public static final String EXT_DATA_CHUNK = "_chunk";
-        public static final int MAJOR_HEARTBEAT_INTERVAL = 60 * 1000;  // 1 minute
+        public static final int MAJOR_HEARTBEAT_INTERVAL = 5 * 60 * 1000;  // 5 minute
         public static final int MINOR_HEARTBEAT_INTERVAL = 30 * 1000; // 30 seconds
         public static final int LIVENESS_HEARTBEAT_INTERVAL = 10 * 1000; // 10 seconds
     }
diff --git a/start-chunk-servers.sh b/start-chunk-servers.sh
index 82652fe..7e45182 100755
--- a/start-chunk-servers.sh
+++ b/start-chunk-servers.sh
@@ -21,6 +21,9 @@ declare -a CHUNK_SERVERS=(
   "berlin"
   "cairo"
   "lima"
+  "london"
+  "loveland"
+  "steamboat"
 )
 
 for CHUNK_SERVER in "${CHUNK_SERVERS[@]}"