Inode number layer Provide machine-oriented names for files. ↑ File layer Organize blocks into files. machine-oriented names Block layer Identify disk blocks. ↓ In the rest of this section we work our way up from the bottom layer of Table 2.2 to the top layer, proceeding from the lowest...
__kernel_sa_family_t sin_family;/*Address family*/---填入AF_INET。__be16 sin_port;/*Port number*/---端口号。structin_addr sin_addr;/*Internet address*/---IPv4的地址。/*Pad to size of `struct sockaddr'.*/unsignedchar__pad[__SOCK_SIZE__ -sizeof(shortint) -sizeof(unsignedshorti...
未使用的 block 和 inode 的数量，一个 block 和 inode 的大小，最近一次挂载的时间，最近一次写入数据...
UNIX treats all files as steams of data with no boundaries or structure. In UNIX, each file in the file system is described by an inode. This differs from a file name, as it refers to the following information about the file: Permissions Owner Type Date and time of creation and of las...
Each option offers trade-offs that are best explored though a cost-benefit analysis, which is discussed later in this chapter. Application Structure The next step toward the goal of migrating an application from UNIX to Windows is to gain a high-level view of the application to determine the ...
See Figure 1 on page 2 for a view of this structure. This information unit describes these two interfaces and discusses the things you need to know to write a VFS server or a PFS, or to port one to the z/OS UNIX environment. In order to do this, you should be a system programmer...
? ? ? Group descriptors Bitmaps identify used inodes/blocks All block have the same number of data blocks Advantages of this structure: – Replication simplifies recovery – Proximity of inode tables and data blocks (reduces seek time) 22 Superblocks ? Size of the file system, block size and ...
A file in the file system is basically a link to an inode. ‘inode’ is a ‘data-structure’, which is used for file identification on Linux. Each file on an Unix System has a separate ‘inode’ and an ‘Unique’ inode Number. ...
UNIX treats all files as steams of data with no boundaries or structure. In UNIX, each file in the file system is described by an inode. This differs from a file name, as it refers to the following information about the file: Permissions Owner Type Date and time of creation and of las...
In powers of 1000, 1 KB = 1000 bytes and 1 MB = 1000 Kilobytes, and so on while in powers of 1024 1 KB = 1024 bytes and 1 MB = 1024 Kilobytes.Displaying Inode InformationThe index nodes or inodes are a data structure that stores metadata of files or directories. Each file system ...