零拷贝不仅大大地提高了应用程序的性能，而且还减少了内核与用户模式间的上下文切换。
Zero copy greatly improves application performance and reduces the number of context switches between kernel and user mode.
然后可以生成迁移，并把导出的模式拷贝进迁移。
You can then generate a migration and copy the schema you dumped into a migration.
与租户相关的定制(例如CSS文件和表模式)添加到与租户相关的应用程序和表拷贝中。
Tenant specific customizations (e.g. CSS files and table schemas) are added to the tenant specific copy of the application and table.
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