Method createSnapshot

src/server.h:1380–1385

public:
    const redisDbPersistentDataSnapshot *createSnapshot(uint64_t mvccCheckpoint, bool fOptional) {
        auto psnapshot = redisDbPersistentData::createSnapshot(mvccCheckpoint, fOptional);
        if (psnapshot != nullptr)
            mvccLastSnapshot = psnapshot->mvccCheckpoint();
        return psnapshot;
    }

    unsigned long expires_cursor = 0;
    dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP)*/