HP 3PAR StoreServ 7400 2-node HP 3PAR Management Console 4.3.0 Software User&a - Page 363

Tuning 3.1.1 Systems, Chunklet Allocation Imbalance Threshold

Page 363 highlights

5. Select the Analyze only checkbox if you want to view an analysis instead of running the tuning task. 6. When you are ready to run the task (or see the analysis), click OK. The results will appear in the Task Details pane of the Task tab under Tasks & Schedules. For details about the Task tab, see "Tasks Tab" (page 331). Tuning 3.1.1 Systems When Tune system is selected, you have the option of specifying the following: • Volume Allocation Imbalance Threshold - The percentage above the average space allocated across nodes at which a volume is considered out of balance. • Chunklet Allocation Imbalance Threshold - The percentage above the average (for physical disks of one device type on a single node) at which the number of chunklets allocated to a physical disk is considered out of balance. • Physical Disk Tuning Limit - The number of physical disks (of one device type on one node) that have reached or exceeded the Chunklet Allocation Imbalance Threshold. The system looks for over-allocated space or chunklets to trigger the tune. • Maximum Simultaneous Tasks - The maximum number of individual tuning tasks allowed to run at the same time. The value must be in the range of 1 to 8. Additionally, the Tune System wizard gives you the following option: Analyze only - By selecting this checkbox, you have the option of viewing an analysis of the tuning tasks that would be performed according to your specified values, without running the tuning task. This analysis is displayed in the Tasks management window. Tune System 363

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5.
Select the
Analyze only
checkbox if you want to view an analysis instead of running the tuning
task.
6.
When you are ready to run the task (or see the analysis), click
OK
.
The results will appear in the Task Details pane of the Task tab under
Tasks & Schedules
. For details
about the Task tab, see
“Tasks Tab” (page 331)
.
Tuning 3.1.1 Systems
When
Tune system
is selected, you have the option of specifying the following:
Volume Allocation Imbalance Threshold
– The percentage above the average space allocated
across nodes at which a volume is considered out of balance.
Chunklet Allocation Imbalance Threshold
– The percentage above the average (for physical
disks of one device type on a single node) at which the number of chunklets allocated to a
physical disk is considered out of balance.
Physical Disk Tuning Limit
– The number of physical disks (of one device type on one node)
that have reached or exceeded the Chunklet Allocation Imbalance Threshold.
The system looks for over-allocated space or chunklets to trigger the tune.
Maximum Simultaneous Tasks
– The maximum number of individual tuning tasks allowed to
run at the same time. The value must be in the range of 1 to 8.
Additionally, the
Tune System
wizard gives you the following option:
Analyze only
– By selecting this checkbox, you have the option of viewing an analysis of the tuning
tasks that would be performed according to your specified values, without running the tuning task.
This analysis is displayed in the Tasks management window.
Tune System
363