Method EstimateSize

src/dbwrapper.h:307–320

    template<typename K>
    size_t EstimateSize(const K& key_begin, const K& key_end) const
    {
        CDataStream ssKey1(SER_DISK, CLIENT_VERSION), ssKey2(SER_DISK, CLIENT_VERSION);
        ssKey1.reserve(DBWRAPPER_PREALLOC_KEY_SIZE);
        ssKey2.reserve(DBWRAPPER_PREALLOC_KEY_SIZE);
        ssKey1 << key_begin;
        ssKey2 << key_end;
        leveldb::Slice slKey1((const char*)ssKey1.data(), ssKey1.size());
        leveldb::Slice slKey2((const char*)ssKey2.data(), ssKey2.size());
        uint64_t size = 0;
        leveldb::Range range(slKey1, slKey2);
        pdb->GetApproximateSizes(&range, 1, &size);
        return size;
    }

    /**
     * Compact a certain range of keys in the database.