The VFS provides a switching layer between the SCI and the file systems supported by the kernel (see Figure 4).

vfs在sci和内核所支持的文件系统之间提供了一个交换层(请参看图4)。

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Business continuity guarantees that if a data center storage device fails, the failure of the two dual mode switching process is completely unaware of the business layer.

业务连续性保障如果一个数据中心存储设备出现故障，两种双活模式所进行的故障切换过程对业务层来说，是完全无感知的。

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This technology auto accomplished in physical layer, no need upper protocol layer support, has the strongpoint of fast switching and short application resume time.

该技术完全在物理层自动完成，无需上层协议的支持，具有快速切换和业务恢复时间短等优点。

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"Once vendors support more protocols, acceptance of Layer 3 switching should increase dramatically, " said Eric Pylko, global infrastructure coordinator at Eastman-Kodak Corp. in Rochester, N.

CNN: Networking trends emerge for '99

Software-defined networks will provide some of this flexibility by separating the control function from data forwarding, but there are additional capabilities emerging, he says, such as intelligent switching of wavelengths, the ability to mix dedicated bandwidth with best-efforts networks, and application layer network traffic optimization, e.g.

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