commitChanges async api

src/IStorage.h

@@ -7,6 +7,13 @@
 #define METADATA_DB_IDENTIFIER "c299fde0-6d42-4ec4-b939-34f680ffe39f"
 
 struct StorageToken {
+    enum class TokenType {
+        SingleRead,
+        SingleWrite,
+        Delete,
+        BatchWrite,
+    };
+    TokenType type;
     std::unordered_set<struct client *> setc;
     struct redisDbPersistentData *db;
     virtual ~StorageToken() {}
@@ -46,6 +53,9 @@ class IStorage
     virtual StorageToken *begin_retrieve(struct aeEventLoop *, aePostFunctionTokenProc, sds *, size_t) {return nullptr;};
     virtual void complete_retrieve(StorageToken * /*tok*/, callbackSingle /*fn*/) {};
 
+    virtual StorageToken* begin_endWriteBatch(struct aeEventLoop *, aePostFunctionTokenProc*) {} // NOP
+    virtual void complete_endWriteBatch(StorageToken * /*tok*/) {};
+
     virtual void bulkInsert(char **rgkeys, size_t *rgcbkeys, char **rgvals, size_t *rgcbvals, size_t celem) {
         beginWriteBatch();
         for (size_t ielem = 0; ielem < celem; ++ielem) {

src/StorageCache.cpp

@@ -233,4 +233,5 @@ void StorageCache::emergencyFreeCache() {
             dictRelease(d);
         });
     }
-}
+}
+

src/StorageCache.h

@@ -45,6 +45,8 @@ class StorageCache
     void retrieve(sds key, IStorage::callbackSingle fn) const;
     StorageToken *begin_retrieve(struct aeEventLoop *el, aePostFunctionTokenProc proc, sds *rgkey, size_t ckey);
     void complete_retrieve(StorageToken *tok, IStorage::callbackSingle fn);
+    StorageToken* begin_endWriteBatch(struct aeEventLoop *el, aePostFunctionTokenProc* proc) {return m_spstorage->begin_endWriteBatch(el,proc);} // NOP
+    void complete_endWriteBatch(StorageToken *tok) {m_spstorage->complete_endWriteBatch(tok);};
     bool erase(sds key);
     void emergencyFreeCache();
     bool keycacheIsEnabled() const { return m_pdict != nullptr; }

src/db.cpp

@@ -3087,7 +3087,14 @@ void redisDbPersistentData::commitChanges(const redisDbPersistentDataSnapshot **
         m_pdbSnapshotStorageFlush = nullptr;
     }
     if (m_spstorage != nullptr)
-        m_spstorage->endWriteBatch();
+    {
+        auto *tok = m_spstorage->begin_endWriteBatch(serverTL->el, storageLoadCallback);
+        if (tok != nullptr)
+        {
+            tok->db = this;
+            tok->type = StorageToken::TokenType::BatchWrite;
+        }
+    }
 }
 
 redisDbPersistentData::~redisDbPersistentData()
@@ -3420,7 +3427,13 @@ void redisDbPersistentData::prefetchKeysFlash(std::unordered_set<client*> &setc)
 
 void redisDbPersistentData::processStorageToken(StorageToken *tok) {
     auto setc = std::move(tok->setc);
-    tok->db->m_spstorage->complete_retrieve(tok, [&](const char *szKey, size_t cbKey, const void *data, size_t cb) {
+    switch (tok->type)
+    {
+
+    case StorageToken::TokenType::SingleRead:
+    {
+        tok->db->m_spstorage->complete_retrieve(tok, [&](const char *szKey, size_t cbKey, const void *data, size_t cb)
+                                                {
         auto *db = tok->db;
         size_t offset = 0;
         sds key = sdsnewlen(szKey, -((ssize_t)cbKey));
@@ -3451,11 +3464,23 @@ void redisDbPersistentData::processStorageToken(StorageToken *tok) {
                 serverAssert(db->m_setexpire->find(key) != db->m_setexpire->end());
             }
             serverAssert(o->FExpires() == (db->m_setexpire->find(key) != db->m_setexpire->end()));
-        }
-    });
-    tok = nullptr;  // Invalid past this point
+        } });
+        break;
+    }
+    case StorageToken::TokenType::BatchWrite:
+    {
+        tok->db->m_spstorage->complete_endWriteBatch(tok);
+        break;
+    }
+    default:
+        serverAssert((tok->type == StorageToken::TokenType::SingleRead) || (tok->type == StorageToken::TokenType::BatchWrite));
+        break;
+    } //switch end
 
-    for (client *c : setc) {
+    tok = nullptr; // Invalid past this point
+
+    for (client *c : setc)
+    {
         std::unique_lock<fastlock> ul(c->lock);
         if (c->flags & CLIENT_BLOCKED)
             unblockClient(c);

src/storage/rocksdb.cpp

@@ -255,6 +255,31 @@ void RocksDBStorageProvider::endWriteBatch()
     m_lock.unlock();
 }
 
+struct BatchStorageToken : public StorageToken {
+    std::shared_ptr<rocksdb::DB> tspdb;    // Note: This must be first so it is deleted last
+    std::unique_ptr<rocksdb::WriteBatchWithIndex> tspbatch;
+};
+
+StorageToken* RocksDBStorageProvider::begin_endWriteBatch(struct aeEventLoop *el, aePostFunctionTokenProc* callback){
+    BatchStorageToken *tok = new BatchStorageToken();
+    tok->tspbatch = std::move(m_spbatch);
+    tok->tspdb = m_spdb;
+    m_spbatch = nullptr;
+    m_lock.unlock();
+    (*m_pfactory->m_wqueue)->AddWorkFunction([this, el,callback,tok]{
+        tok->tspdb->Write(WriteOptions(),tok->tspbatch.get()->GetWriteBatch());
+        aePostFunction(el,callback,tok);
+    });
+
+    return tok;
+}
+
+void RocksDBStorageProvider::complete_endWriteBatch(StorageToken* tok){
+    delete tok;
+    tok = nullptr;
+}
+
+
 void RocksDBStorageProvider::batch_lock()
 {
     m_lock.lock();
@@ -330,4 +355,4 @@ void RocksDBStorageProvider::complete_retrieve(StorageToken *tok, callbackSingle
         }
     }
     delete rtok;
-}
+}

src/storage/rocksdb.h

@@ -42,6 +42,8 @@ class RocksDBStorageProvider : public IStorage
 
     virtual void beginWriteBatch() override;
     virtual void endWriteBatch() override;
+    virtual StorageToken* begin_endWriteBatch(struct aeEventLoop *el, aePostFunctionTokenProc* proc);
+    virtual void complete_endWriteBatch(StorageToken *tok);
 
     virtual void bulkInsert(char **rgkeys, size_t *rgcbkeys, char **rgvals, size_t *rgcbvals, size_t celem) override;