PRIMECLUSTER Global File Services Configuration and Administration Guide 4.5

2.1.3 Meta-data area

This section describes the area of meta-data management. The meta-data area is an area for storing meta-data, which exists only in a representative partition.

2.1.3.1 Area management data

Area management data includes the allocation information of i-node, V-data and file data.

File data allocation information is managed in extent-base while combining a part to include extent information with a list managed with a degree of continuity.

When a file system is created with sfcmkfs(8), an area of the fixed size is allocated for management information, i-nodes and V-data.

2.1.3.2 i-node area

The i-node area is a data structure containing file data. The pointer to extent information including the file data and the file type, length, owner, group IDs, and access right are stored in each i-node. There is one i-node for each file.

2.1.3.3 V-data area

The V-data area includes a directory block, a symbolic link path name, and indirect extent management information. An area is obtained from this area if necessary. The V-data area is managed in units of 1,024 bytes for efficient use of directory blocks.