Functional and Operational Characteristics
2–51
Hitachi VSP User and Reference Guide
912 Dynamic
Tiering
Dynamic
Tiering for
Mainframe
When the mode is set to ON, HDT monitoring
information of a HDP pool containing a HDP VOL to
which the per-page policy setting is made is
discarded
One hour or more is required from the time when
the mode is set to on to the time when the
discarding processing is completed. In addition, the
per-page policy setting is prevented while the mode
is ON.
Mode 912 = ON:
HDT monitoring information of a HDP pool
containing a HDP VOL to which the per-page policy
setting is made is discarded.
The following restrictions are applied to the HDP
pool.
1. When execution mode is Auto, monitoring the
target HDP pool is disabled.
2. When execution mode is Manual, a request to
start monitoring the target HDP pool is not
accepted.
3. Monitoring information (weighted average
information) of the target HDP pool is
discarded.
Mode 912 = OFF (default):
HDT monitoring information of a HDP pool
containing a HDP VOL to which the per-page policy
setting is made is not discarded.
Notes:
1. The mode is applied when the micro-program is
downgraded from V04 or higher to earlier than
V04 while the per-page policy setting has been
made once. (including a case that the per-page
policy setting is once made and then released.)
2. After setting the mode to ON, wait for one hour
or more until the discarding processing is
completed.
Mode Category Description Default MCU/RCU
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