如何为每个本地 GAE 应用程序实例设置单独的数据存储？答案

【问题标题】：How to set individual data store per local GAE app instance?如何为每个本地 GAE 应用程序实例设置单独的数据存储？
【发布时间】：2014-11-22 18:46:41
【问题描述】：

出于测试目的，我想在本地启动两个 GAE 应用程序实例。但是，第二个实例将无法启动，因为第一个实例已对本地数据库施加了锁。

INFO     2014-09-28 05:14:22,751 admin_server.py:117] Starting admin server at: http://localhost:8081
OperationalError('database is locked',)
Traceback (most recent call last):
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 1302, in communicate
    req.respond()
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 831, in respond
    self.server.gateway(self).respond()
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 2115, in respond
    response = self.req.server.wsgi_app(self.env, self.start_response)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/devappserver2/wsgi_server.py", line 266, in __call__
    return app(environ, start_response)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/devappserver2/module.py", line 1431, in __call__
    return self._handle_request(environ, start_response)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/devappserver2/module.py", line 641, in _handle_request
    module=self._module_configuration.module_name)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/apiproxy_stub.py", line 165, in WrappedMethod
    return method(self, *args, **kwargs)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/logservice/logservice_stub.py", line 172, in start_request
    host, start_time, method, resource, http_version, module))
OperationalError: database is locked

有什么方法可以在我的应用的第二个实例中指定替代数据存储位置？

【问题讨论】：

标签： python google-app-engine python-2.7

【解决方案1】：

取决于您如何启动应用程序。

如果使用 Java，不妨看看this answer。

但请记住，您的两个应用不会与相同的数据存储区通信，因此如果您需要在实例之间保留数据，这将不起作用。

【讨论】：

感谢您的回答，但不幸的是我正在使用python