rename GC to CollectGarbage, ignore badger.ErrNoRewrite

blockstore/badger/blockstore.go

@@ -131,13 +131,19 @@ func (b *Blockstore) Close() error {
 	return b.DB.Close()
 }
 
-// GC runs garbage collection on the value log
-func (b *Blockstore) GC() error {
+// CollectGarbage runs garbage collection on the value log
+func (b *Blockstore) CollectGarbage() error {
 	if atomic.LoadInt64(&b.state) != stateOpen {
 		return ErrBlockstoreClosed
 	}
 
-	return b.DB.RunValueLogGC(0.125)
+	err := b.DB.RunValueLogGC(0.125)
+	if err == badger.ErrNoRewrite {
+		// not really an error in this case
+		return nil
+	}
+
+	return err
 }
 
 // View implements blockstore.Viewer, which leverages zero-copy read-only

blockstore/splitstore/splitstore.go

@@ -1016,14 +1016,14 @@ func (s *SplitStore) compactFull(curTs *types.TipSet) error {
 		return xerrors.Errorf("error syncing tracker: %w", err)
 	}
 
-	if gc, ok := s.hot.(interface{ GC() error }); ok {
+	if gc, ok := s.hot.(interface{ CollectGarbage() error }); ok {
 		log.Infof("garbage collecting hotstore")
 		startGC := time.Now()
-		err = gc.GC()
+		err = gc.CollectGarbage()
 		if err != nil {
 			log.Warnf("error garbage collecting hotstore: %s", err)
 		} else {
-			log.Infow("garbage collecting done", "took", time.Since(startGC))
+			log.Infow("garbage collection done", "took", time.Since(startGC))
 		}
 	}