Hitachi Command Suite 8 User Guide

							About the Storage Systems treeHitachi Command Suite lists registered storage systems and providesinformation summaries in the Storage Systems tree on the Resources tab.
The Storage Systems tree lists:• Storage systems• DP Pools
• Parity groups
• Volumes ○Open-Allocated
○ Open-Unallocated
○ Open-Reserved
○ Mainframe-Unspecified
• External Storage
The Storage Systems tree is the starting point for changing the configuration
of these resources.
Related tasks
•
Viewing current storage system information  on page 401
Viewing current storage system information Configuration information for all managed resources is available on theResources tab.
Procedure 1. On the  Resources  tab, select  Storage Systems .
2. Select the parent group from the  Storage Systems tree to view a
volume summary and additional detailed information in the application pane.
3. Click on the link for a storage system to access additional details.
4. Continue to view more details by clicking the links on subsequent views.
Related concepts
•
About the Storage Systems tree  on page 401
Viewing MP Blade information You can view and edit the MP Blade information.
Procedure 1. On the  Resources  tab, expand the  Storage Systems  tree, and select a
target storage system.
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							2.Choose one of the following options:
• For Virtual Storage Platform G1000 storage systems: Select  Components .
• For other available storage systems: From the  Actions list in the application pane, select  Element
Manager , and then from the  Storage Systems tree, select
Components .
3. On the  Components  window, click  Chassis ID.
Result The MP Blade information is displayed.
Tip:  For details about editing MP Blade information, click Help.
About the Hosts tree
Hitachi Command Suite lists registered hosts by operating system in the
Hosts tree on the Resources tab.
You can register both physical hosts and virtualization servers. You can also
group the WWNs or iSCSI names used by specific storage systems and set up that group as a host. You select a host from the Hosts tree to allocate orunallocate volumes. Note that you can reference all registered hosts, but for
the list of volumes that are allocated to each host, you can only reference volumes that fall within your resource group assignments.
Related tasks
•
Viewing current host information  on page 402
Viewing current host information Information for all managed hosts is available on the Resources tab.
Procedure 1. On the  Resources  tab, select  Hosts to expand the tree.
2. Select an operating system to see an information summary and a list of
hosts on the application pane.
3. Click the link for a host to access additional details.
4. Continue to view more details by clicking the links on subsequent views.
Related concepts
•
About the Hosts tree  on page 402
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							About the file server viewYou view information about the volumes and file systems of managed file
servers through the file server view.
Information acquired by the Device Manager can be hierarchically displayed
by registering a file server as a Device Manager resource. Users can select a
file server from the file server view to allocate or unallocate.
You can execute setting operations such as allocation and unallocation by cluster or by file server (node).
Related tasks
•
Monitoring file servers  on page 403
Monitoring file servers You can check on the status of your file servers and review volume and file
system information.
Procedure 1. On the  Resources  tab, select  File Servers .
2. Expand the tree and select the resource whose information you want to
browse.
3. In the application area, select the resource you want to reference.
4. Browse the information such as volumes and file systems.
Related concepts
•
About the file server view  on page 403
Analyzing storage system performance This module describes procedures for analyzing storage system performance
to determine if a storage system is the source of application performance problems.
About analyzing storage system performance The Analytics tab provides information for analyzing storage system
performance issues, and assists storage administrators in monitoring short term and long term trends.
Note:  A Tuning Manager license is required to use the Analytics tab. For
details on Tuning Manager, see the  Hitachi Command Suite Tuning Manager
User Guide .
Use the Analytics tab to check storage system performance by:
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							• Identifying performance problems for storage systems:○If there is an application performance issue, obtain the information
needed to identify a logical group. For example, this could be the host where the problem occurred, the label of the volume, or the mount
point. Based on the acquired information, specify the period (up to thepast 30 days) for analyzing the performance and the logical group or
the host that corresponds to the application in order to analyze the
performance issue. Check that no resources exceed the threshold values
and determine whether the cause of the performance issue is in the storage system.
• Analyzing and load balancing MP Blades or MP Units: ○For Virtual Storage Platform G1000, Virtual Storage Platform, and HUS
VM storage systems, you can identify MP Blade/Unit busy rates that
exceed threshold values, and view resources placing a heavy load on the MP Blade/Unit. If possible, reduce the processing load or change theexecution time of the processing using the resources. If you want to
allocate resources to a different MP Blade/Unit, you can create a plan
and simulate the effect of assigning resources to another MP Blade/Unit
with a lower busy rate. To implement the plan, generate a raidcom
command script based on the plan, and run the script using CCI to re-
assign the resources.Note:  The term MP Blade is used for Virtual Storage Platform G1000 and
Virtual Storage Platform. The term MP Unit is used for HUS VM.
• Performing periodic performance analysis of storage systems:
○Analyze the performance of storage systems to periodically check that
resources are being used appropriately.
○ The target storage system can be automatically analyzed at a specific
interval; for example, weekly or monthly. For multiple storage systems,
analysis schedules can be set to execute in a batch process to reduce
the workload of storage system management. In addition, you can
specify settings for performance analysis to send notifications by email of any errors that occur during analysis, as well as attach this
information in the form of PDF-format analysis results reports to an email message.
○ By using these analysis results reports, you can check whether a
resource exists that exceeds or nearly exceeds the threshold value. If
there is a problem in the resource, check the detailed performance
information from the report that corresponds to each resource metric.
Based on performance information such as the number of I/O
operations (IOPS) and data traffic displayed in the report, discuss what
measures to take and perform any volume allocation or data migration
tasks. Resolving performance problems can prevent errors.
○ By referring to past analysis results, problems can be specified and
actions can be determined more easily. The analysis report can be
404Monitoring managed resources and resolving alertsHitachi Command Suite User Guide 
						

							output to a PDF or CSV file. If output to a PDF file, the contents and a
summary are created so that the report can be submitted as is. If output to a CSV file, the report is useful as a general-purpose file, and it
can be effectively used to create materials by editing the format.
For more detailed performance information, by starting Performance Reporter, you can perform an analysis in minute units or analysis of long-
term trends. If you import a report definition to Performance Reporter in
Tuning Manager in advance, you can display a report with items that
correspond to the items in the Identify Performance Problems wizard or a
Health Check report.
An appropriate default value is set for the threshold values to judge if there are problems with storage system performance. You can change the
threshold values for their environment if necessary. In accordance with the
specified threshold values, the background of the displayed analysis result
chart is colored for each threshold range. The Caution threshold range is
displayed in yellow. The Warning threshold range is displayed in pink.
Related tasks
•
Identifying storage system performance problems  on page 405
•
Creating periodic health check reports for storage systems performance
analysis  on page 412
•
Analyzing and load balancing MP Blades or MP Units  on page 407
Identifying storage system performance problems With Tuning Manager installed, you can identify storage system performanceproblems from the Analytics tab.
Prerequisites
• Install Tuning Manager and link it to HCS.
• Register the Tuning Manager license.• Import the report definition file in Tuning Manager before analyzing performance with the Analytics tab (ensure that you delete the report
definition file for the previous version before importing the latest report
definition file).
• Identify the date and time of the performance problem. • Identify application information such as host or logical group name.
For information about linking with Tuning Manager and importing the report definition file in Tuning Manager, see the  Hitachi Command Suite
Administrator Guide .
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							Procedure1. From the tree in the  Analytics tab, select the target logical group and
click  Identify Performance Problems . You can also select a host or
specific volumes in the target logical group.
2. Read the  Introduction  and click Next.
3. Based on the application information acquired from the host
administrator, set the storage system type, volumes, and period to analyze, and then click  Next.
4. In Overview , check for resources with performance threshold cautions:
• For an MP Blade/Unit with threshold cautions, click  Analyze MP
Blades  or Analyze MP Units  to analyze MP Blade/Unit busy rate
metrics and create a plan for reassigning resources to a less busy MP
Blade or MP Unit to load balance host I/O requests.
• For other resources that exceed a threshold value, there might be a problem with the storage system. If this is the case, click  Next.Tip: If there is no resource that exceeds a threshold value, it is likely
that the problem does not originate from the storage system. If this is
the case, close the Wizard.
5. Check the information for each metric displayed for each type of storage
system type, and then click  Next. Check the analysis report. The
analysis result chart displays the Warning threshold range in pink.
If you analyze enterprise-class storage (such as Virtual Storage Platform G1000, Virtual Storage Platform, Universal Storage Platform V/VM,
Universal Storage Platform, or HUS VM), and when all volumes that
belong to a parity group are included in the following list of volumes, the
chart displaying Read Hit rate is not displayed:
• ShadowImage S-VOLs
• TrueCopy S-VOLs • Universal Replicator S-VOLs• Copy-on-Write Snapshot V-VOLs • Copy-on-Write Snapshot Pool volume
• Thin Image V-VOLs
• Thin Image Pool volume • DP pool volume
Tip:  To view detailed performance information, start Performance
Reporter. From Performance Reporter, display the report by selecting Identify Performance Problems  under Identify Performance
Problems and Health Check . You can analyze on a per-minute basis or
on a long-term trend basis by setting the appropriate display conditions.
For details on using Performance Reporter, see the  Hitachi Command
Suite Tuning Manager User Guide .
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							Related concepts
•
About analyzing storage system performance  on page 403
Related tasks
•
Creating periodic health check reports for storage systems performance
analysis  on page 412
•
Analyzing and load balancing MP Blades or MP Units  on page 407
Related references •
Configuring the Performance Reporter display  on page 420
Analyzing and load balancing MP Blades or MP Units On the Analytics tab you can identify MP Blades and MP Units with a busy
rate exceeding caution thresholds, and assign resources to an MP Blade or MP
Unit with a lower busy rate to improve host application performance or
balance I/O requests for disks with varying performance levels (HDD, SSD,
FMD).
Prerequisites
• Install Tuning Manager and link it to HCS.
• Register the Tuning Manager license.• Import the report definition file from Tuning Manager before analyzing performance with the Analytics tab (ensure that you delete the report
definition file for the previous version before importing the latest report
definition file).
• To analyze MP Blade or MP Unit busy rates, the storage system must be a Virtual Storage Platform G1000, Virtual Storage Platform, or HUS VM. Formore information, see the  Hitachi Command Suite Administrator Guide .
• The storage administrator must have permission to log in to the server where CCI is installed, and permission to use  raidcom commands to
modify the target storage system so that MP Blade or MP Unit resource
assignments can be completed.
Tip:  For simplification, the term MP Blade will be used in the steps below
except for specific GUI elements. For HUS VM storage systems, the displayed
term will be MP Unit.
Procedure
1. On the  Analytics  tab, choose an MP blade to analyze by doing one of the
following:
• Select a target host or logical group and click  Identify Performance
Problems . From the Overview page (if MP blade cautions appear) or
from MP Blade page, click  Analyze MP Blades.
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							• Expand the storage system tree, select a storage system from theapplication pane, and then click  Analyze MP Blades/Units. The
Analyze MP Blades  window opens.
2. On the  Analyze MP Blades  window, verify that the  Analysis Target
information is correct.
3. In MP Blades Busy Rate , examine the busy rate graph and determine
which MP Blade is a candidate (based on exceeding thresholds, or having
the highest busy rate) for reassigning resources to a less busy MP Blade.
If a target MP Blade is not already selected, select the target MP Blade
and click  Choose as Target MP Blade .
4. In Selected MP Blades , identify the resources causing the high busy
rate.
5. After identifying busy resources for the target MP Blade, return to  MP
Blades Busy Rate  and select the destination MP Blade to which you
want to assign resources, and then click  Choose as Destination MP
Blade .
6. Select resources and click  Move to assign resources to the destination
MP Blade and create the assignment plan.Tip:  For target MP Blade resources that should be excluded from the
assignment plan, select the resource and click the  Lock button. For
example, system disks or disks that cannot afford a temporary deterioration in response time due to cache operations incurred when
reassigning the resource to another MP Blade.
7. Verify that the created plan is acceptable, and then click  Generate
Script Commands  to create the raidcom command script.
8. Log in to the server where CCI is installed.
9. Execute the  raidcom command script from CCI to physically reassign
resources.
10. Run Performance Reporter to check that the busy rate for the target MP
Blade and destination MP Blade are acceptable.
Tip:  To view detailed performance information, start Tuning Manager
from the Tools menu. By displaying Performance Reporter reports from
Tuning Manager, you can analyze information on a per-minute basis or
based on long-term trends. For details on how to use Performance
Reporter, see the  Hitachi Command Suite Tuning Manager User Guide .
Result
The busy rate for the target and destination MP Blades is adjusted by the reassignment of resources.
Related concepts
•
About analyzing storage system performance  on page 403
408Monitoring managed resources and resolving alertsHitachi Command Suite User Guide 
						

							Related tasks
•
Identifying storage system performance problems  on page 405
•
Changing peformance threshold settings to correctly analyze storage
system performance  on page 419
Related references
•
Configuring the Performance Reporter display  on page 420
Metrics of volumes of Virtual Storage Platform G1000, Virtual
Storage Platform, and HUS VM (Identify Performance Problems
wizard) Volume metrics for enterprise storage systems, as shown in the performanceproblem wizard, can help identify performance issues.
For each item used to analyze performance displayed in the IdentifyPerformance Problems wizard, there are guideline values for evaluation if Hitachi Virtual Storage Platform G1000, Hitachi Virtual Storage Platform or Hitachi Unified Storage VM volumes (basic volumes, DP volumes, external
volumes) are used.
When analyzing DP volumes, all caches, MP Blades (Virtual Storage Platform G1000, Virtual Storage Platform) and MP Units (Unified Storage VM) that arerelated to DP volumes are targeted. The target parity groups are those to which DP pool volumes that compose a DP pool belong. When analyzingexternal volumes, both the internal storage system and the external storage system are targeted.
In the Identify Performance Problems wizard, the status is judged as Caution
when items exceed the following thresholds.
Table 12-1  Volume metrics for Virtual Storage Platform G1000, Virtual
Storage Platform and Unified Storage VM (Identify Performance Problems wizard)
ItemMetricThresholdNotesPortBusy RateCaution: ≧
100%• With the default threshold value settings, the port status will not become [Caution].CacheWrite
Pending
RateCaution: >
30%• Up to 30% is considered normal.
• Frequent or sustained episodes of 40% deserve attention.
• Frequent or sustained episodes to 50% require prompt remediation.
• At 70%, inflow control is enabled which is disruptive.
• High write pending is a sign of back end congestion.Side File
Usage
RateCaution:  ≧
10%• This is only applicable for TrueCopy Asynchronous.
• Little, if any, should be reported under normal conditions. High side file usage is a sign of
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							ItemMetricThresholdNotesWrite
Pending
Rate +
Side File
Usage
RateCaution:  ≧
70%• It is very important to look at both CWP and SF together since they share the same cache pool and
cannot exceed 70%.
• The closer CWP or SF, or CWP+SF is to 70%, the closer the storage system is to major performance
problems.
• When the write pending reaches 70%, the storage system starts to destage write data until the write
pending usage reaches 30%, which will degrade
performance.MP Blade
(Virtual
Storage
Platform
G1000, Virtual
Storage
Platform)
MP Unit (HUS
VM)Busy RateCaution:  ≧
40%• -Parity GroupBusy RateCaution:  ≧
50%• Parity Group utilization should be less than 50%.Read HitCaution:  ≦
25%• -Tip:  If you want to view detailed performance information, start Performance
Reporter. By doing so, you can perform an analysis per minute or a long-
term trend analysis for more performance evaluation items.
Related concepts
•
About analyzing storage system performance  on page 403
Metrics of volumes of Universal Storage Platform V/VM and Hitachi
USP (Identify Performance Problems wizard) For each item used to analyze performance displayed in the Identify
Performance Problems wizard, there are guideline values for evaluation if Universal Storage Platform V/VM or Hitachi USP volumes (basic volumes, DPvolumes, external volumes) are used.
When analyzing DP volumes, all caches and CHPs (Channel Processors) that are related to DP pool volumes are targeted. The target parity groups andDKPs (Disk Processors) are those that are related to DP pool volumes that
compose the DP pool. When analyzing external volumes, both the internal
storage system and the external storage system are targeted.
In the Identify Performance Problems wizard, the status is judged as Cautionwhen items exceed the following thresholds.
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