You can specify a value for the Prefer attribute for the <IOTEMP> and <ACCESSTEMP> criteria, which gives preference to relocating files. The Prefer attribute can take two values:
high. If you specify
low, Veritas File System (VxFS) relocates the files with the lower I/O temperature before relocating the files with the higher I/O temperature. If you specify
high, VxFS relocates the files with the higher I/O temperature before relocating the files with the lower I/O temperature. Symantec recommends that you specify a Prefer attribute value only if you are using solid state disks (SSDs).
See Prefer mechanism.
<RELOCATE> ... <WHEN> <IOTEMP Type="nrbytes" Prefer="high"> <MIN Flags="gteq"> 3.4 </MIN> <PERIOD Units="hours"> 6 </PERIOD> </IOTEMP> </WHEN> </RELOCATE>
If there are a number of files whose I/O temperature is greater than the given minimum value, the files with the higher temperature are first subject to the RELOCATE operation before the files with the lower temperature.