PRIMECLUSTER Global File Services Configuration and Administration Guide 4.2 (Solaris(TM) Operating Environment)

6.1 Setting the Extent Attribute Information

The GFS Local File System has functions that allocate a data area beforehand to a file, extend a data area in a certain proportion, and guarantee data area continuity. The information that enables these functions is called extent attribute information. These functions enable a system offering higher performance, by ensuring data area allocation and data area continuity.

Use sfxsetext(1) to set the extent attribute information. However, you cannot use it to set this information in an existing file. To set the extent attribute information in an existing file, execute sfxsetext(1) with an alias, copy the data with sfxcp(1) and change the name of alias to the original with sfxmv(1).

An example for using sfxsetext(1) is given below:

# sfxsetext -a 100,25 -f contig /mnt/file

For details of the sfxsetext(1) command, see Appendix B.3.5 "sfxsetext(1)."