Apple Xsan 1.1 - Manual (Page 115)

Appendix B Using the Command Line 115
Creating and Pre-Allocating a File (cvmkfile)
You can use the cvmkfile command to allocate space for a file on an Xsan volume.
$ cvmkfile [-k affinity] [-p] [-s] [-w] [-z] size(k|m|g) filename
Example
Allocate 2 GB of space for the file
data1
on the storage pool
datasets
:
$ cvmkfile -k datasets 2g data1
Parameter Description
-k affinity Allocate space for the file on the storage pool with the specified
affinity key.
affinity – the affinity key (in Xsan, the affinity key is the same as
the name of the storage pool)
You can use the cvadmin show long command to see a storage
pool’s affinity key.
-p Force future extensions of the file to be aligned on block
boundaries.
-s Force the file allocation to align with block boundaries.
-w Set file size as indicated by size .
-z Set the contents of the file to zeros.
size(k|m|g) A number specifying the amount of space to allocate to the file.
size – a number
k – kilobytes
m – megabytes
g – gigabytes
filename The name of the file to allocate.