Hitachi Command Suite 8 User Guide

							Related tasks
•
Monitoring Universal Replicator performance  on page 425
•
Configuring network bandwidth for analysis  on page 427
Related references
•
Prerequisites for analyzing Universal Replicator performance  on page 425
Analyzing Universal Replicator performance in wizard mode In wizard mode, the GUI guides you through the process of examining
resource metrics and suggests possible solutions.
Prerequisites
You must satisfy the following requirements before using the UR Performance Analysis window:
• Ensure that your site configuration meets all the configuration requirements for Universal Replicator performance analysis described inthe  Hitachi Command Suite Administrator Guide .
• Ensure that Hitachi Tuning Manager and Replication Manager are installed and linked to HCS.
• Ensure that users have the necessary permissions (roles and resource access) for the UR Performance Analysis window of the Replication tab.
Note:  The performance analysis function supports copy groups consisting of
open volumes. Copy groups that are defined by device group, use multiple
journal groups in a Universal Replicator MxN configuration, or use virtual
command devices, are not supported.
Procedure
1. Open the  Replication  tab.
2. On the  Copy Groups  tab, select a copy group and click  Analyze UR
Performance (Wizard Mode) .
3. Read the  Introduction  and click Next.
4. Using the slider below the graph, choose a  Time Period as instructed
and then click  Next.
Note:  If you see cache or processor resources listed that are not
associated with the copy group you are analyzing, execute  Refresh
Storage System  on the Administration  tab and then, select  Refresh
Performance Data  on the Replication  tab with the  Also refresh copy
group configuration  check box selected.
• By default, Replication Manager polls information sources for copy pair
status every 5 minutes. Depending on the data interval you set, this
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							can affect how the display is refreshed in the UR Performance Analysis
window.
• By default, new performance data is collected through Hitachi Tuning Manager every four hours. A gray zone in the graph indicates
uncollected data. If you click  Refresh Performance Data  at this
point, the wizard closes and you restart this procedure when the task
is complete.
5. On the displayed pages, examine each metric and use the checkbox to
mark any resources that exceed the threshold. (You can select  Mark
resources that exceed pre-set threshold  to select them all.)
Click  Next to proceed.
6. The  Results Report  page includes the detected issues and the possible
causes and solutions based on your selections. Click the  Show Detail
link to display the resources and the graphed data.
Result
The solutions include instructions to check each resource to confirm the
problem and apply the suggested solution.
Related concepts
•
About analyzing Universal Replicator performance  on page 424
•
About refreshing UR Performance Analysis data  on page 436
Related tasks
•
Analyzing Universal Replicator performance in advanced mode  on page
432
•
Exporting Universal Replicator performance reports  on page 434
Related references
•
Prerequisites for analyzing Universal Replicator performance  on page 425
•
Metrics for Universal Replicator performance analysis  on page 429
Analyzing Universal Replicator performance in advanced mode In advanced mode, UR Performance Analysis creates graphs that are basedon a selection of metrics to highlight possible performance problems.
Prerequisites
You must satisfy the following requirements before using the UR Performance
Analysis window:
• Ensure that your site configuration meets all the configuration requirements for Universal Replicator performance analysis described in
the  Hitachi Command Suite Administrator Guide .
• Ensure that Hitachi Tuning Manager and Replication Manager are installed and linked to HCS.
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							• Ensure that users have the necessary permissions (roles and resourceaccess) for the UR Performance Analysis window of the Replication tab.Note:  The performance analysis function supports copy groups consisting of
open volumes. Copy groups that are defined by device group, use multiple
journal groups in a Universal Replicator MxN configuration, or use virtual
command devices, are not supported.Note:  If you see cache or processor resources listed that are not associated
with the copy group you are analyzing, execute Refresh Storage System on
the Administration tab and then, select Refresh Performance Data on the Replication tab with the Also refresh copy group configuration check box selected.
Procedure
1. Open the  Replication  tab.
2. On the  Copy Groups  tab, select a copy group and click  Analyze UR
Performance (Advanced Mode) .
Result The default dashboard includes four panes that plot metrics for  S-VOL, M-
JNL , R-JNL , and Network . Each panel has a Report list to choose metrics to
plot in a graph. Use the maximize control to view a single pane.
Tip:  The M-JNL pane includes reports featuring the  P-VOL Write Transfer
Rate , a metric that displays the amount of data transmitted from host or host
group per P-VOL.
You can customize the display in several ways:
• Time Settings adjusts the time period for all panes. • View Settings selects the panes to display in the dashboard.
• Each report includes a list for selecting the metric, and Configure Chart customizes the display:
○ You can select an existing entry from the Charts list to modify (or
remove). Clicking Add creates a chart.
○ Chart Settings sets the title, chooses metrics for the left and right axes,
and the chart position.
• When a pane is maximized, Vertical Comparison adds a second graph.
• When the  Network pane is maximized, Volumes Sharing Path Group
displays a list of primary volumes in the same path group as the copy
group that is being analyzed. Use this list to identify other volumes and copy groups that may be affecting the performance of the target copygroup.
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							Tip: The list of volumes also includes any TrueCopy Synchronous copy
groups that use the same remote path as the target.
• You can also annotate a graph with  memos, text windows that allow you to
take notes.
○ Click Add Memo to start a new note. You can also add a note by double-
clicking within a graph.
○ As with any window, you can move, minimize, or delete it using the
controls in the title bar.
• Configure Thresholds for M-JNL Analysis changes the threshold value (horizontal red line) in the chart.
Tip:  By default, Replication Manager polls information sources for copy pair
status every 5 minutes. Depending on the data interval you set, this can
affect how the display is refreshed in the UR Performance Analysis window.
Related concepts
•
About analyzing Universal Replicator performance  on page 424
•
About the P-VOL Write Transfer Rate metric  on page 435
•
About refreshing UR Performance Analysis data  on page 436
Related tasks
•
Analyzing Universal Replicator performance in wizard mode  on page 431
•
Exporting Universal Replicator performance reports  on page 434
Related references
•
Metrics for Universal Replicator performance analysis  on page 429
•
Prerequisites for analyzing Universal Replicator performance  on page 425
•
Metrics for Universal Replicator performance analysis  on page 429
Exporting Universal Replicator performance reports You can export Universal Replicator performance data to a PDF file forreporting purposes.
Tip:  You can also obtain UR performance data (in CSV form) using the
following command line tools:
• GetCopyGroup
• RefreshReplicationPerformanceData
• GetReplicationPerformanceData
For more information, see the  Hitachi Command Suite CLI Reference Guide .
The UR Performance Analysis window includes an export function to save
output to a PDF file on the following panes:
• Analyze UR Performance (main screen)
• Results Report (wizard mode)
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							• Analysis Target (advanced mode)
Procedure 1. If you are exporting data from the Analyze Universal Replicator
performance main screen, first select a copy group from the  Copy
Groups  tab.
2. Click  Export .
If you are exporting data from the main screen, you are prompted to
select a Time Period.
3. For graphs in the advanced mode pane, any memos you created are
included by default. To exclude your memos from the report, de-select
Display the memos on the graphs .
4. Click  Submit .
5. Select the export location for the report.
The PDF file is saved in the specified location.Tip:  It is useful to save a C/T delta baseline so that you can later detect
any gradual worsening of C/T delta performance over time. An accurate
baseline requires stable host I/O. Wait for the completion of any settings
and status changes that affect C/T delta (such as initial copies of newly
added copy groups, or a copy group that shares a remote path). For best
results, when using the  Export function on the main screen, select a
Time Period of one day (1d).
Related tasks
•
Analyzing Universal Replicator performance in wizard mode  on page 431
•
Analyzing Universal Replicator performance in advanced mode  on page
432
Related references
•
Prerequisites for analyzing Universal Replicator performance  on page 425
About the P-VOL Write Transfer Rate metric The P-VOL Write Transfer Rate metric is used to calculate the amount of datawritten (in MB/sec) for each of the P-VOLs that comprise a copy group.
Normally, the total of P-VOL Write Transfer Rate values in a copy group
approximates the value of the Host Write Transfer Rate to M-JNL. The P-VOL Write Transfer Rate metric is available in the M-JNL pane of the advanced
mode window.
The P-VOL Write Transfer Rate can be used to narrow down possible causes
after identifying the copy group where C/T delta degradation has been
observed. There are two basic scenarios:
• P-VOL traffic may be dominating network bandwidth.
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							For best results, first observe the Array Port Transfer Rate (amount of data
output from a port) or the M-JNL Async Transfer Rate to RCU (amount of
data output for each M-JNL). Once you have identified the specific copy
group, you can use the PVOL Write Transfer Rate to determine which application/host uses the constituent P-VOLs, or which host group has
written the largest amount of data.
• P-VOL traffic may be overloading storage resources.
If you observe the Host Write Transfer Rate to M-JNL increase during or
before a C/T Delta increase, storage resources (such as processor, cache,
or parity group) may be overtaxed. In this case, analyze the P-Vol Write
Transfer Rate to identify the responsible host/application. You can then
choose to tune the application or add resources.Tip:  When you select a report that includes the P-VOL Write Transfer Rate,
the graph includes a filter that permits you to narrow down the number of P-
VOLs to be plotted.
About refreshing UR Performance Analysis data
By default, Replication Manager polls information sources for copy pair statusevery 5 minutes. (This setting is part of the Replication Manager GUI, not the
UR Performance Analysis window.) If you have increased this polling setting
(refresh value) to be longer than the data interval in the UR Performance
Analysis window, the plot in the graph is updated less often (regardless of the
data interval setting). For example, a refresh value of 30 minutes updates
the graph every half hour, even if the data interval is set to 10 minutes.
Setting the refresh value to less than 10 minutes helps ensure the plot is
updated every 10 minutes (assuming data interval of 10 minutes). However,
you might also need to consider the load balance if you reduce the refresh
value because (in some cases) refreshing the copy pair status will actually take longer than the setting indicates.
Managing alerts This module describes how to view, confirm, and manage alerts.
About alerts Hitachi Command Suite regularly monitors storage system and file server
(Hitachi NAS Platform v12.0 or later only) status.
Alerts are reported on the Dashboard, in the Storage System Alerts report. You can select the severity levels of alerts to be collected in this report by
clicking the tool icon application pane.
Alert details can be confirmed on the Tasks & Alerts tab. • Resolved alerts can be deleted manually from the list.
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							• The upper limit of the alerts that are managed by HCS is 500,000. Whenthe number of alerts exceeds the upper limit, older alerts are deleted.
Alerts can also be delivered in email when SNMP traps are received from storage systems or file servers (Hitachi NAS Platform v12.0 or later, Hitachi
NAS Platform F, and Hitachi Data Ingestor only). To configure the required
settings, see the  Hitachi Command Suite Administrator Guide .
Related tasks
•
Confirming an alert  on page 437
Confirming an alert You can list, review, and delete alerts.
Procedure 1. On the  Tasks & Alerts  tab, click All Alerts.
2. Click on an alert to review the alert details and take appropriate action.
Result
The alert is resolved.
Tip:  When the number of alerts for a storage system or file server node
exceeds 10,000 alerts, memory might become insufficient. We recommend
that you manually delete alerts that are no longer necessary. However, for
HNAS, if the number of alerts for a single cluster exceeds 10,000, the alerts
for that cluster are automatically deleted starting from the oldest alert.
As alerts are confirmed as resolved, select the resolved alerts, and click
Delete Alerts.
Related concepts
•
About alerts  on page 436
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							A
Managing storage resources that havevirtual IDs
This module describes specific functionality available for virtualized volume
resources for which virtual IDs are assigned.
□
About managing storage resources that have virtual IDs
□
Displaying virtual ID information
□
Allocating volumes to hosts with virtual IDs
Managing storage resources that have virtual IDs439Hitachi Command Suite User Guide 
						

							About managing storage resources that have virtual IDsWhen replacing an old storage system with a Virtual Storage Platform or HUSVM, you can use virtual IDs to migrate host resources (volumes) without
stopping the host. Virtual IDs provide information about the old storage
system, and are configured on the migration-destination resource. By using
Device Manager, you can check virtual IDs after data migration and perform operations on a resource that has been assigned virtual IDs. Even if you can
view the virtual ID of a resource, until data migration to the target resource is complete, you cannot perform operations on the resource.
During the three stages of data migration, accessing the resource datachanges from using the physical ID to the virtual ID, as the following graphic
shows:
• Before data migration (using physical IDs)
Before data migration, a host uses physical IDs to perform operations on the migration-source resource. Operations can be performed on the
resource by using Device Manager.
• During data migration
The path from the host to the storage system is changed from themigration source to the migration destination. Configure virtual IDs on the
migration-destination resource, and then migrate the data from the
migration-source resource. On the migration-destination storage system,
440Managing storage resources that have virtual IDsHitachi Command Suite User Guide