From 5654d0d60d2bfffcc428fd50461abc965a8a4400 Mon Sep 17 00:00:00 2001
From: joshuafc <joshuafc@foxmail.com>
Date: Thu, 9 Sep 2021 10:42:34 +0800
Subject: [PATCH] CompactionTableSizeMultiplier of leveldb use default value. 
 #2325

To improve performance of leveldb find key in condition of large directory(millions of files) which use uuid as filename.
---
 weed/filer/leveldb/leveldb_store.go   |  7 +++----
 weed/filer/leveldb2/leveldb2_store.go |  7 +++----
 weed/filer/leveldb3/leveldb3_store.go | 14 ++++++--------
 3 files changed, 12 insertions(+), 16 deletions(-)

diff --git a/weed/filer/leveldb/leveldb_store.go b/weed/filer/leveldb/leveldb_store.go
index 2b8456f25..9a7670d42 100644
--- a/weed/filer/leveldb/leveldb_store.go
+++ b/weed/filer/leveldb/leveldb_store.go
@@ -46,10 +46,9 @@ func (store *LevelDBStore) initialize(dir string) (err error) {
 	}
 
 	opts := &opt.Options{
-		BlockCacheCapacity:            32 * 1024 * 1024, // default value is 8MiB
-		WriteBuffer:                   16 * 1024 * 1024, // default value is 4MiB
-		CompactionTableSizeMultiplier: 10,
-		Filter:                        filter.NewBloomFilter(8), // false positive rate 0.02
+		BlockCacheCapacity: 32 * 1024 * 1024,         // default value is 8MiB
+		WriteBuffer:        16 * 1024 * 1024,         // default value is 4MiB
+		Filter:             filter.NewBloomFilter(8), // false positive rate 0.02
 	}
 
 	if store.db, err = leveldb.OpenFile(dir, opts); err != nil {
diff --git a/weed/filer/leveldb2/leveldb2_store.go b/weed/filer/leveldb2/leveldb2_store.go
index 4c4409c4d..966686ed9 100644
--- a/weed/filer/leveldb2/leveldb2_store.go
+++ b/weed/filer/leveldb2/leveldb2_store.go
@@ -46,10 +46,9 @@ func (store *LevelDB2Store) initialize(dir string, dbCount int) (err error) {
 	}
 
 	opts := &opt.Options{
-		BlockCacheCapacity:            32 * 1024 * 1024, // default value is 8MiB
-		WriteBuffer:                   16 * 1024 * 1024, // default value is 4MiB
-		CompactionTableSizeMultiplier: 4,
-		Filter:                        filter.NewBloomFilter(8), // false positive rate 0.02
+		BlockCacheCapacity: 32 * 1024 * 1024,         // default value is 8MiB
+		WriteBuffer:        16 * 1024 * 1024,         // default value is 4MiB
+		Filter:             filter.NewBloomFilter(8), // false positive rate 0.02
 	}
 
 	for d := 0; d < dbCount; d++ {
diff --git a/weed/filer/leveldb3/leveldb3_store.go b/weed/filer/leveldb3/leveldb3_store.go
index bc57a6605..86e2b584b 100644
--- a/weed/filer/leveldb3/leveldb3_store.go
+++ b/weed/filer/leveldb3/leveldb3_store.go
@@ -66,17 +66,15 @@ func (store *LevelDB3Store) initialize(dir string) (err error) {
 func (store *LevelDB3Store) loadDB(name string) (*leveldb.DB, error) {
 	bloom := filter.NewBloomFilter(8) // false positive rate 0.02
 	opts := &opt.Options{
-		BlockCacheCapacity:            32 * 1024 * 1024, // default value is 8MiB
-		WriteBuffer:                   16 * 1024 * 1024, // default value is 4MiB
-		CompactionTableSizeMultiplier: 4,
-		Filter:                        bloom,
+		BlockCacheCapacity: 32 * 1024 * 1024, // default value is 8MiB
+		WriteBuffer:        16 * 1024 * 1024, // default value is 4MiB
+		Filter:             bloom,
 	}
 	if name != DEFAULT {
 		opts = &opt.Options{
-			BlockCacheCapacity:            4 * 1024 * 1024, // default value is 8MiB
-			WriteBuffer:                   2 * 1024 * 1024, // default value is 4MiB
-			CompactionTableSizeMultiplier: 4,
-			Filter:                        bloom,
+			BlockCacheCapacity: 4 * 1024 * 1024, // default value is 8MiB
+			WriteBuffer:        2 * 1024 * 1024, // default value is 4MiB
+			Filter:             bloom,
 		}
 	}