ZODB is a robust, multi-user, object-oriented database system capable of storing and managing arbitrarily complex Python objects with transaction support and concurrency control.
For example, if your application is oriented toward online transaction processing (OLTP), slow performance will quickly result in users wanting to abandon the system.
例如，如果你的程序是面向在线事务处理(OLTP)的，操作太慢很快就会导致用户产生放弃系统的念头。
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Users and system orientation: an OLTP system is customer-oriented and is used for transaction and query processing by clerks, clients, and information technology professionals.