volume: optimzation for leveldb

weed/storage/volume_loading.go

@@ -88,6 +88,7 @@ func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool, needleMapKind
 			opts := &opt.Options{
 				BlockCacheCapacity:            2 * 1024 * 1024, // default value is 8MiB
 				WriteBuffer:                   1 * 1024 * 1024, // default value is 4MiB
+				CompactionTableSizeMultiplier: 10,              // default value is 1
 			}
 			if v.nm, e = NewLevelDbNeedleMap(fileName+".ldb", indexFile, opts); e != nil {
 				glog.V(0).Infof("loading leveldb %s error: %v", fileName+".ldb", e)
@@ -97,6 +98,7 @@ func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool, needleMapKind
 			opts := &opt.Options{
 				BlockCacheCapacity:            4 * 1024 * 1024, // default value is 8MiB
 				WriteBuffer:                   2 * 1024 * 1024, // default value is 4MiB
+				CompactionTableSizeMultiplier: 10,              // default value is 1
 			}
 			if v.nm, e = NewLevelDbNeedleMap(fileName+".ldb", indexFile, opts); e != nil {
 				glog.V(0).Infof("loading leveldb %s error: %v", fileName+".ldb", e)
@@ -106,6 +108,7 @@ func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool, needleMapKind
 			opts := &opt.Options{
 				BlockCacheCapacity:            8 * 1024 * 1024, // default value is 8MiB
 				WriteBuffer:                   4 * 1024 * 1024, // default value is 4MiB
+				CompactionTableSizeMultiplier: 10,              // default value is 1
 			}
 			if v.nm, e = NewLevelDbNeedleMap(fileName+".ldb", indexFile, opts); e != nil {
 				glog.V(0).Infof("loading leveldb %s error: %v", fileName+".ldb", e)