现在，读取事务可以访问当前提交的、连贯的行映像(写入事务以不兼容方式锁定)，而不会受到阻塞。

Now, a read transaction can access the currently committed and consistent image of rows that are incompatibly locked by write transactions without being blocked.

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映像以这种方式传递可以使成本和运行复杂软件栈的配置、安装以及维护最小化。

Delivery of an image in this manner minimizes the cost and complexity of the installation, configuration, and maintenance of running complex stacks of software.

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检查外部快照中的空闲空间量的另一种方式是，挂载映像并使用df命令。

Another way to check the amount of free space in an external snapshot is to mount the image and use the df command.

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