call db.SetSync when necessary

blockchain/store.go

@@ -172,6 +172,9 @@ func (bs *BlockStore) SaveBlock(block *types.Block, blockParts *types.PartSet, s
 
 	// Done!
 	bs.height = height
+
+	// Flush
+	bs.db.SetSync(nil, nil)
 }
 
 func (bs *BlockStore) saveBlockPart(height int, index int, part *types.Part) {
@@ -213,7 +216,7 @@ func (bsj BlockStoreStateJSON) Save(db dbm.DB) {
 	if err != nil {
 		PanicSanity(Fmt("Could not marshal state bytes: %v", err))
 	}
-	db.Set(blockStoreKey, bytes)
+	db.SetSync(blockStoreKey, bytes)
 }
 
 func LoadBlockStoreStateJSON(db dbm.DB) BlockStoreStateJSON {

state/state.go

@@ -80,7 +80,7 @@ func (s *State) Copy() *State {
 func (s *State) Save() {
 	s.mtx.Lock()
 	defer s.mtx.Unlock()
-	s.db.Set(stateKey, s.Bytes())
+	s.db.SetSync(stateKey, s.Bytes())
 }
 
 func (s *State) Equals(s2 *State) bool {