No snapshotting by default (#11814)

ethcore/src/snapshot/mod.rs

@@ -102,8 +102,8 @@ const MAX_SNAPSHOT_SUBPARTS: usize = 256;
 /// Configuration for the Snapshot service
 #[derive(Debug, Clone, PartialEq)]
 pub struct SnapshotConfiguration {
-    /// If `true`, no periodic snapshots will be created
-    pub no_periodic: bool,
+    /// Enable creation of periodic snapshots
+    pub enable: bool,
     /// Number of threads for creating snapshots
     pub processing_threads: usize,
 }
@@ -111,7 +111,7 @@ pub struct SnapshotConfiguration {
 impl Default for SnapshotConfiguration {
     fn default() -> Self {
         SnapshotConfiguration {
-            no_periodic: false,
+            enable: false,
             processing_threads: ::std::cmp::max(1, num_cpus::get_physical() / 2),
         }
     }