It's not a requirement
这不是一个要求,这不是必须的
1.
For new VMs, it is generally a good idea to configure additional hardware prior to installing the VM's OS, but it's not a requirement.
对新建的虚拟机来说,通常最好应先配置新硬件,然后再安装操作系统,但这不是必须的。
2.
Although there is a traditional view for how these processes work, it's not a requirement of the architecture for map and reduce to behave this way.
虽然这里存在一个这些过程如何工作的传统视图,但是它不是 map 和 reduce 体系结构所需要的。