btree benchmark

invodb/btree/btree_node.cpp

@@ -7,6 +7,9 @@
 std::map<int, NodeUUID*> NodeUUID::map;
 
 NodeUUID *NodeUUID::getNode(const int &address) {
+    if(address == 0) {
+        throw "fuck";
+    }
     if(map.count(address) == 0) {
         delete map[address];
         map[address] = new NodeUUID(address);
@@ -98,3 +101,6 @@ void NodeUUID::release() {
 NodeUUID *NodeUUID::release(const int &address) {
     return nullptr;
 }
+
+
+

invodb/btree/btree_uuid.cpp

@@ -19,7 +19,6 @@ int BTreeUUID::find(const std::string& uuid) {
 int BTreeUUID::findNode(const std::string& uuid) {
     NodeUUID* cur = NodeUUID::getNode(root);
     while(!cur->leaf) {
-        int parent = cur->address;
         for(int i=0; i<cur->size; i++) {
             if(uuid < cur->key[i]) {
                 cur = NodeUUID::getNode(cur->val[i]);
@@ -30,32 +29,28 @@ int BTreeUUID::findNode(const std::string& uuid) {
                 break;
             }
         }
-        //if(cur->parent != parent) cur->parent = parent;
-        //cur->save();
     }
     return cur->address;
 }
 
+void BTreeUUID::update(const std::string &uuid, int address) {
+    if(find(uuid) == -1) {
+        throw "key doesn't exists.";
+    }
+    NodeUUID* cur = NodeUUID::getNode(findNode(uuid));
+    cur->val[cur->findPos(uuid)] = address;
+    cur->save();
+}
 
 void BTreeUUID::insert(const std::string& uuid, int address) {
-
-    NodeUUID* cur = NodeUUID::getNode(root);
-    NodeUUID* parent = nullptr;
-
-    while(!cur->leaf) {
-        parent = cur;
-        for(int i=0; i<cur->size; i++) {
-            if(uuid < cur->key[i]) {
-                cur = NodeUUID::getNode(cur->val[i]);
-                break;
-            }
-            if(i == cur->size - 1) {
-                cur = NodeUUID::getNode(cur->val[i + 1]);
-                break;
-            }
-        }
+    if(find(uuid) != -1) {
+        throw "key already exists.";
     }
 
+    n_size++;
+
+    NodeUUID* cur = NodeUUID::getNode(findNode(uuid));
+
     // insert directly
     if(cur->size < cur->m - 1) {
         cur->val[cur->insert(uuid)] = address;
@@ -64,13 +59,11 @@ void BTreeUUID::insert(const std::string& uuid, int address) {
     }
 
     // split
-    if(parent == nullptr) split(uuid, address, 0, cur->address);
-    else split(uuid, address, parent->address, cur->address);
+    split(uuid, address, cur->parent, cur->address);
 }
 
 void BTreeUUID::split(const std::string& uuid, int address, int parentAddr, int curAddr) {
 
-    NodeUUID* parent = NodeUUID::getNode(parentAddr);
     NodeUUID* cur = NodeUUID::getNode(curAddr);
 
     cur->val[cur->insert(uuid)] = address;
@@ -116,7 +109,7 @@ void BTreeUUID::split(const std::string& uuid, int address, int parentAddr, int
     } else {
         lLeaf->save();
         rLeaf->save();
-        insertInternal(rLeaf->key[0], parent->address, lLeaf->address, rLeaf->address);
+        insertInternal(rLeaf->key[0], cur->parent, lLeaf->address, rLeaf->address);
     }
 }
 
@@ -203,7 +196,7 @@ void BTreeUUID::insertInternal(const std::string& uuid, int curAddr, int lLeafAd
     }
 }
 
-
+/*
 void BTreeUUID::print() {
     innerPrint(NodeUUID::getNode(root));
 }
@@ -235,10 +228,14 @@ void BTreeUUID::innerPrint(NodeUUID *cur) {
     }
 
 }
+ */
 
 void BTreeUUID::remove(const std::string &uuid) {
+    if(find(uuid) == -1) {
+        throw "key doesn't exists.";
+    }
+    n_size--;
     NodeUUID* cur = NodeUUID::getNode(findNode(uuid));
-    if(find(uuid) == -1) printf("ohFUCK\n");
     removeEntry(cur->address, uuid, find(uuid));
 }
 
@@ -428,14 +425,62 @@ void BTreeUUID::redistribute(int curAddr, int sibAddr) {
     parent->save();
 }
 
-int BTreeUUID::test() {
-    NodeUUID* cur = NodeUUID::getNode(findNode("\0"));
-    int sum = cur->size;
-    while(cur->right) {
-        cur = NodeUUID::getNode(cur->right);
-        sum += cur->size;
+int BTreeUUID::size() {
+    return n_size;
+}
+
+void BTreeUUID::testAndBenchmark(const int& n) {
+
+    clock_t start = clock();
+
+    std::map<std::string, int> map;
+
+    for(int i=0; i<n; i++) {
+        int opt = rand() % 4;
+        // insert
+        if(opt <= 1) {
+            std::string uuid = generateUUID();
+            int addr = rand();
+            insert(uuid, addr);
+            map[uuid] = addr;
+        }
+        // update
+        else if(opt == 2) {
+            if(map.size() == 0) continue;
+            auto it = map.begin();
+            std::advance(it, rand() % map.size());
+            std::string uuid = it->first;
+            int addr = rand();
+            map[uuid] = addr;
+            update(uuid, addr);
+        }
+        // remove
+        else {
+            if(map.size() == 0) continue;
+            auto it = map.begin();
+            std::advance(it, rand() % map.size());
+            std::string uuid = it->first;
+            map.erase(uuid);
+            remove(uuid);
+        }
     }
-    return sum;
+
+    if(map.size() != size()) {
+        printf("%d %d\n", map.size(), size());
+        printf("BTree has BUG!\n");
+        exit(0);
+    }
+
+    for(auto it=map.begin(); it != map.end(); it++) {
+        if(find(it->first) != it->second) {
+            printf("BTree has BUG!\n");
+            exit(0);
+        }
+    }
+
+    clock_t end   = clock();
+
+    printf("BTree pass the test with n=%d, time=%fs!\n", n, (double)(end - start) / CLOCKS_PER_SEC);
 }
 
 

invodb/btree/btree_uuid.h

@@ -12,10 +12,12 @@ class BTreeUUID {
 public:
     BTreeUUID(const int& address);
     void insert(const std::string& uuid, int address);
+    void update(const std::string& uuid, int address);
     void remove(const std::string& uuid);
     int find(const std::string& uuid);
     void print();
-    int test();
+    void testAndBenchmark(const int& n);
+    int size();
 private:
     void removeEntry(int curAddr, const std::string& uuid, const int& pointer);
     bool canCoalesce(int curAddr, int sibAddr);
@@ -27,7 +29,7 @@ private:
     void split(const std::string& uuid, int address, int parentAddr, int curAddr);
     void insertInternal(const std::string& uuid, int curAddr, int lLeafAddr, int rLeafAddr);
     int root;
-    int cnt;
+    int n_size;
 };
 
 

invodb/main.cpp

@@ -4,51 +4,10 @@
 
 #include "main.h"
 
-
-void benchmark() {
-    BTreeUUID *btree = new BTreeUUID(PageManager::Instance().allocate());
-    char uuid[33]; uuid[32] = '\0';
-
-    std::vector<std::pair<std::string, int>> v;
-
-    const int n = 100000;
-
-    for(int i=0; i<n; i++) {
-        generateUUID(uuid);
-        int addr = PageManager::Instance().allocate();
-        v.push_back(std::make_pair(uuid, addr));
-        btree->insert(uuid, addr);
-    }
-
-    for(int i=0; i<100000; i++) {
-        std::swap(v[rand()%v.size()], v[rand()%v.size()]);
-    }
-
-    for(int i=0; i<v.size(); i++) {
-        int addr = btree->find(v[i].first);
-        if(addr != v[i].second) {
-            printf("fuck\n");
-            exit(0);
-        }
-    }
-
-    for(int i=0; i<v.size(); i++) {
-        if(i < v.size() / 2) {
-            btree->remove(v[i].first);
-        } else {
-            int addr = btree->find(v[i].first);
-            if(addr != v[i].second) {
-                printf("fuck\n");
-                exit(0);
-            }
-        }
-    }
-}
-
 int main() {
     int t = time(0);
     //srand(1635418590);
-    srand(1635423140);
+    srand(t);
     printf("seed: %d\n", t);
 
     system("rm -rf test.invodb && touch test.invodb");
@@ -69,7 +28,8 @@ int main() {
     JSON json("{\"hello\": 1}");
     col->insert(json);
 
-    benchmark();
+    BTreeUUID *btree = new BTreeUUID(PageManager::Instance().allocate());
+    btree->testAndBenchmark(1000);
 
     return 0;
 }

invodb/models/collection.cpp

@@ -10,11 +10,9 @@ Collection::Collection(const std::string &name, const int &firstPage) {
 
 void Collection::insert(JSON &json) {
     if(!json.HasMember("__Invo_ID__")) {
-        char uuid[32];
-        generateUUID(uuid);
         Document::AllocatorType &allocator = json.GetAllocator();
         Value invoid (kStringType);
-        invoid.SetString(uuid, 32);
+        invoid.SetString(generateUUID().c_str(), 32);
         json.AddMember("__Invo_ID__", invoid, allocator);
     }
     Logger::info<std::string, std::string>("INSERT ", json.ToString());

invodb/utils/uuid.h

@@ -8,11 +8,13 @@
 #include <iostream>
 #include <string>
 
-inline void generateUUID(char *uuid) {
+inline std::string generateUUID() {
+    char uuid[33]; uuid[32] = '\0';
     for(int i=0; i<32; i++) {
         int randn = rand() % 36;
         uuid[i] = (randn < 26 ? ('a' + randn) : ('0' + (randn - 26)));
     }
+    return std::string(uuid, 32);
 }
 
 inline std::string appropriateString(const std::string& s, const int& offset) {