Path names in an integrated file system user-defined file system

 

A block special file (*BLKSF) represents a user-defined file system (UDFS) when the entire UDFS and all of the objects within it need to be manipulated. If your UDFS resides on the system or on a basic user ASP, block special file names must be of the form

/dev/QASPXX/udfs_name.udfs

where XX is the ASP number where you store the UDFS, and udfs_name is the unique name of the UDFS within that ASP. Note that the UDFS name must end with the .udfs extension. If your UDFS resides on an independent ASP, block special file names must be of the form

/dev/asp_name/udfs_name.udfs

where asp_name is the name of independent ASP where you store the UDFS and udfs_name is the unique name of the UDFS within that independent ASP. Note that the UDFS name must end with the .udfs extension.

Path names for objects within a UDFS are relative to the directory over which you mount a UDFS. For example, if you mount the UDFS /dev/qasp01/wysocki.udfs over /home/dennis, then the path names for all objects within the UDFS will begin with /home/dennis.

Additional path name rules:

• Each component of the path name can be up to 255 characters long. The full path name can be up to 16 MB long.

• There is no limit to the depth of the directory hierarchy other than program and server space limits.

• The characters in names are converted to UCS2 Level 1 form (for *TYPE1 directories) and UTF-16 (for *TYPE2 directories) when the names are stored.

 

Parent topic:

User-defined file systems (UDFSs)

 

Related concepts

Name continuity
*TYPE2 directories
Path name