HP XP7 Storage - Manual (Page 91)

Example of deleting a tier
If a tier no longer has any pool-VOLs when you delete them, the tier is deleted from the pool. The
following figure illustrates deleting a tier.
For more information about tiering policy and groups, see “Tiering policy levels” (page 91) .
Tiering policy levels
Note 3 tier pool 2 tier pool 1 tier pool Tiering policy
Default Tiering Policy All 3 tiers Both tiers Single Tier All(0)
Data is located to the Top Tier. Any overflow moves
to the next lower tier. Tier 1 Tier 1 Same as
All(0) Level1(1)
Data is located to the Top Tier after Level1(1)
assignments are processed. Any overflow moves to
the next lower tier. Tier 1 and
Tier 2
See note
Same as
All(0) Same as
All(0) Level2(2)
Data is located to the Middle Tier. Any overflow moves
to the top tier. Tier 2
See note
Same as
All(0) Same as
All(0) Level3(3)
Data is located to the Middle Tier after Level3(3)
assignments are processed. Any overflow moves to
the next lower tier. Tier 2 and
Tier 3
See note
Same as
All(0) Same as
All(0) Level4(4)
Data is located to the bottom tier. Any overflow moves
to the next higher tier. Tier 3
See note
Tier 2 Same as
All(0) Level5(5)
Depends
on user
setting Depends
on user
setting Same as
All(0) From Level6(6) to
Level31(31)
For example:
If additional capacity is added to the pool and the capacity defines a new Tier 1 or new Tier 2, then the THP VOLs
with a Level 5(5) assignment will not physically move but Level 5(5) will be associated with Tier 3.
If additional capacity is added to the pool and the capacity defines a new Tier 3, the THP VOLs with a Level 5(5)
assignment will physically move to the new Tier 3 and Level 5(5) will be associated with Tier 3.
Viewing the tiering policy in the performance graph
You can view the frequency distribution graph of the pool by selecting either the level of the tiering
policy or the entire pool on the performance graph in the View Tier Properties window.
Smart Tiers Z 91