Hitachi Command Suite 8 User Guide

Tip: To display the most recent SplitTime in Device Manager after
performing operations on a Copy-on-Write Snapshot or Thin Image copy pair, you need to refresh the storage system information.
Related concepts
•
About replicating volumes (pair management)  on page 307
Deleting command devices If you decommission the pair management server, delete the command
device. When you delete command devices, the communication channel between hosts and storage for replication commands is deleted.
Procedure 1. From...

312Replicating volumes for continuous accessHitachi Command Suite User Guide 

8
Optimizing storage performance
This module describes how to improve your storage.
□
About optimizing storage
□
About optimizing HBA configurations
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About high temperature mode
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Managing cache logical partitions
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Data mobility
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Data migration
Optimizing storage performance313Hitachi Command Suite User Guide 

About optimizing storageHitachi Command Suite allows you to manage storage by allocating volumes,
expanding tiers and DP pools, and performing migration, based on
information acquired from checking summaries, alerts, performance
statistics, and the operating status of storage resources. Storage utilization can also be improved with effective management of HBA and cache (CLPRs)resources.
Using HDT pools, you can manage performance and capacity to optimize storage by creating parity groups in the following...

operations decrease without relocating effectively. You can disable the
relocation of HDT volumes for which the current data location presents no problems, to reduce relocation load.
• When using HDT pools, important data is allocated to the lower hardware tier because it has fewer I/O accesses. To prevent unwanted relocations,
set a specific hardware tier for the HDT pool by configuring tiering (Tier 1,
Tier 2, and Tier 3).
• When using HDT pools, use the flexibility of tiering to spread the data in a...

Over time, heavily used servers might exhibit the need for improved high-
availability, and/or improved I/O and throughput performance. HCS provides
for the optimization and maintenance of server HBA configurations, as
follows:
• For optimizing a server HBA configuration, you can add one or more HBAs to a server, and simultaneously identify one or more HBAs (WWNs) in the
host group for the purpose of inheriting existing LUN path information for the newly added HBAs. This provides a fast and easy way to...

• To edit a WWN nickname from the list of WWN Pairs, click Edit
WWN Nicknames .
7.Click  Show Plan  and confirm that the information in the plan summary
is correct. If changes are required, click  Back.
8. (Optional) Update the task name and provide a description.
9. (Optional) Expand  Schedule to specify the task schedule.
You can schedule the task to run immediately or later. The default setting
is  Now . If the task is scheduled to run immediately, you can select  View
task status  to monitor the task...

Related references
•
Enabling high temperature mode for VSP G1000 storage systems  on page
318
Enabling high temperature mode for VSP G1000 storage systems For Virtual Storage Platform G1000 storage systems, you can enable high
temperature mode.
Prerequisites
• You must install a valid license for this feature.
Caution:  Before you enable high temperature mode, see the  Hitachi Virtual
Storage Platform G1000 Hardware Guide  for important information.
Procedure
1. On the  Resources  tab, click Storage...

system or during a maintenance window. Before creating a CLPR, read
Cautions and restrictions for Virtual Partition Manager .
If no CLPRs have been created, the entire cache is displayed as CLPR0. When
the first CLPR is created, CLPR1 is added. Up to CLPR31 can be created.
The default cache capacity is 8 GB. CLPRs can be created by assigning the necessary capacity from CLPR0. If you use Cache Residency, the remaining cache capacity after subtracting the Cache Residency capacity from the cache
capacity of...

8.Click  Add. The created CLPR is added to the  Selected CLPRs table.
To delete a CLPR from the  Selected CLPRs table, select the CLPR and
click  Remove . To change the settings of an existing CLPR, select the
CLPR and  Change Settings  to open the Change Settings  window.
9. Click  Finish .
10. Check the settings in the  Confirm window, enter the task name in  Task
Name , and click  Apply.
Result
The CLPR is created. A newly created CLPR has no resources (parity groups).
To migrate resources to the new...