1、vnpy提供的，mongodb和mysql，在存储bar、tick行情数据的时候，哪个效率更好呢？
2、大家有考虑过用时间序列数据库来存储吗，例如influxDB等

vnpy2.0.1，Anaconda3.7.4，报错如下怎么解决？

E:\ProgramData\Anaconda3\python.exe H:/InvestingData_python/vnpy-master-20200308/examples/vn_trader/run.py
Traceback (most recent call last):
File "H:/InvestingData_python/vnpy-master-20200308/examples/vn_trader/run.py", line 11, in <module>
from vnpy.gateway.ctp import CtpGateway
File "H:\InvestingData_python\vnpy-master-20200308\vnpy\gateway\ctp__init.py", line 1, in <module>
from .ctp_gateway import CtpGateway
File "H:\InvestingData_python\vnpy-master-20200308\vnpy\gateway\ctp\ctp_gateway.py", line 8, in <module>
from vnpy.api.ctp import (
File "H:\InvestingData_python\vnpy-master-20200308\vnpy\api\ctp\init__.py", line 1, in <module>
from .vnctpmd import MdApi
ImportError: DLL load failed: 找不到指定的模块。

Process finished with exit code 1