conditionally fresh the shard locations

weed/storage/store_ec.go

@@ -210,7 +210,13 @@ func forgetShardId(ecVolume *erasure_coding.EcVolume, shardId erasure_coding.Sha
 
 func (s *Store) cachedLookupEcShardLocations(ctx context.Context, ecVolume *erasure_coding.EcVolume) (err error) {
 
-	if ecVolume.ShardLocationsRefreshTime.Add(10 * time.Minute).After(time.Now()) {
+	shardCount := len(ecVolume.ShardLocations)
+	if shardCount < erasure_coding.DataShardsCount &&
+		ecVolume.ShardLocationsRefreshTime.Add(11 * time.Second).After(time.Now()) ||
+		shardCount == erasure_coding.TotalShardsCount &&
+			ecVolume.ShardLocationsRefreshTime.Add(37 * time.Minute).After(time.Now()) ||
+		shardCount >= erasure_coding.DataShardsCount &&
+			ecVolume.ShardLocationsRefreshTime.Add(7 * time.Minute).After(time.Now()) {
 		// still fresh
 		return nil
 	}