The metadata indicates the filemapping of the DataNode.
元数据说明DataNode的文件映射。
2
Instead, it creates a filemapping that causes the driver code and data to be fetched by paging I/O.
而是,创建一个文件映射,这个映射导致I/O内存分页读取驱动代码和数据。
3
Rather than the host operating system needing to worry about block-to-filemapping, the storage device itself provides this mapping, allowing the host to operate at the file level.