在部署修改后的对象时，会保存新的源代码并备份原来的源代码。

When you deploy the changed object, the new source is saved with a backup of the old source.

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在开始迁移之前，应该停止Director Server并备份数据。

Before starting with the migration, the director server should be stopped and the data backed up.

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行业最佳实践建议经常进行备份，并备份到位于多个地理位置的多种介质上。

The industry's best practices recommend backing up often, onto multiple media, and to separate geographic locations.

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