添加mergeTree (#6)

MergeTree：  #7

Reviewed-on: #6

README.md

@@ -18,3 +18,16 @@ ninja
 
 [性能变慢的因素](./bad/README.md)
 
+
+# 基础知识
+
+- [执行引擎](./engine/README.md)
+  - [Merge Tree](./engine/mergeTree.md)
+  - [Log](./engine/log.md)
+
+
+# 源码解析
+
+- [源码解析](./source/README.md)
+
+

engine/README.md

@@ -1,14 +1,11 @@
 
 表引擎详解
 
-# MergeTree
-
-## ReplacingMergeTree
+# [MergeTree](./mergeTree.md)
 
 
-## SummingMergeTree
 
-# TinyLog
+# [Log](./log.md)
 
 
 # Memory

engine/log.md

@@ -0,0 +1,9 @@
+
+# TinyLog 
+
+
+# StripeLog
+
+
+# Log
+

engine/mergeTree.md

@@ -0,0 +1,23 @@
+
+# MergeTree 
+
+
+# ReplacingMergeTree
+
+
+# SummingMergeTree
+
+
+# AggregatingMergeTree 
+
+
+# CollapsingMergeTree
+
+
+# VersionedCollapsingMergeTree
+
+
+# GraphiteMergeTree
+
+
+

source/README.md

@@ -0,0 +1,4 @@
+
+# 源码解析
+
+