Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

<DESTINATION Flags="any">
<CLASS> ssdtier </CLASS>
</DESTINATION>
</ON>
</CREATE>
<RELOCATE>
<COMMENT>
Move the files out of SSD if their last 3 hour
write IOTEMP is more than 1.5 times the last
24 hour average write IOTEMP. The PERIOD is
purposely shorter than the other RELOCATEs
because we want to move it out as soon as
write activity starts peaking. This criteria
could be used to reduce SSD wear outs.
</COMMENT>
<FROM>
<SOURCE>
<CLASS> ssdtier </CLASS>
</SOURCE>
</FROM>
<TO>
<DESTINATION>
<CLASS> nonssd_tier </CLASS>
</DESTINATION>
</TO>
<WHEN>
<IOTEMP Type="nwbytes" Average="*">
<MIN Flags="gt"> 1.5 </MIN>
<PERIOD Units="hours"> 3 </PERIOD>
</IOTEMP>
</WHEN>
</RELOCATE>
<RELOCATE>
<COMMENT>
OR move the files out of SSD if their last 6 hour
read IOTEMP is less than half the last 24 hour
average read IOTEMP. The PERIOD is longer,
we may want to observe longer periods
having brought the file in. This avoids quickly
sending the file out of SSDs once in.
</COMMENT>
383Administering SmartTier
Using SmartTier with solid state disks