Chapter 4. Logical configuration performance considerations 125
In this case, only used capacity is allocated in the pool and Easy Tier does not move unused
extents around or move hot extents on a large scale up from the Nearline tier to the
Enterprise tier and to the SSD tier. However, thin-provisioned volumes are not fully supported
with all DS8000 Copy Services or advanced functions yet, so it might not be a valid approach
for all environments at this time. For more information about the initial volume allocation in
hybrid extent pools, see “Extent allocation in hybrid and managed extent pools” on page 69.
Staged Implementation approach for multi-tier extent pools
In a new three-tier environment, volumes are first created on the Enterprise ...