adjust filer conf

other/java/client/src/main/proto/filer.proto

@@ -350,9 +350,18 @@ message KvPutResponse {
 }
 
 // path-based configurations
-message FilerPathConfiguration {
-    string location = 1;
-    string collection = 2;
-    string replication = 3;
-    string ttl = 4;
+message FilerConf {
+    int32 version = 1;
+    message PathConf {
+        string location_prefix = 1;
+        string collection = 2;
+        string replication = 3;
+        string ttl = 4;
+        enum DiskType {
+            HDD = 0;
+            SSD = 1;
+        }
+        DiskType disk_type = 5;
+    }
+    repeated PathConf locations = 2;
 }