Hitachi Command Suite 8 User Guide

							5.Add secondary storage system resources, such as  Parity Groups, LDEV
IDs , Storage Ports  and Host Group Numbers  to the virtual storage
machine by clicking the respective tabs.Note:  The primary storage system resources already belong to the
virtual storage machine.
6. When you are finished adding resources from the secondary storage
system, enter an optional task description, select whether you want to
view the progress of the task, and then click  Submit.
Result The storage system resources are configured for the virtual storage machine.
Related concepts •
About global-active device  on page 276
•
About global-active device setup  on page 282
Related tasks
•
Creating virtual storage machines  on page 269
•
Editing virtual storage machines  on page 271
Monitoring and managing global-active device pairs This module describes the required tasks to allocate, monitor, and unallocate
global-active device pairs for hosts.
Allocating global-active device pairs Allocate new global-active device pairs to hosts (application servers). When
you allocate global-active device pairs, an initial copy is performed for the
primary and secondary volumes.
Procedure 1. On the  Resources  tab, General Tasks , select Allocate Volumes .
Tip: 
If you do not see  Allocate Volumes  listed, click more... to see all
menu items.
2. In the  Allocate Volumes  dialog box, select the hosts for the global-
active device pair.
Note:  File-servers are not supported for global-active device pair
allocations.
3. For Allocation Type  select global-active device .
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							4.Specify the number and capacity of the volumes.
5. On the  Primary  tab, configure the following options:
a. Select the primary  Storage system, Virtual Storage Machine , and
Volume type  (HDP or HDT).
Only valid storage systems and virtual storage machine information is
displayed. If you specify HDP as the volume type, select the  Volume
location . If you specify HDT as the volume, the  Volume Selection
options are available. You cannot allocate Basic volumes.
b. Click  Advanced Options  for further configuration.
c. In  LUN Path Options :
Edit LUN paths from primary storage ports to hosts.
d. Click  Host Group and LUN settings  for further configuration.
e. In  Pair management Server Settings :
Select an available host as the pair management server. For Instance
ID, click  Existing  to use a current configuration definition file and
related instance ID number on the pair management server, or click New  to create a new configuration definition file, and enter a new
instance ID number which will be validated as an available instance
ID. You can also specify a  UDP Port number for the instance.
6. On the  Secondary  tab, configure the following options:
a. Select the secondary  Storage system, Virtual Storage Machine ,
and  Volume type  (HDP or HDT):
Virtual storage machine information defaults to the primary tab value.
b. In  Advanced options :
Unlike the Primary tab dialog, this dialog on the Secondary tab allows you to select secondary storage system DP pools (Pools for S-VOL )
that correspond to primary storage system DP pools configured on the primary tab (Pools for P-VOL). For example, automatic selection of DP
volumes will display primary DP pools, and eligible secondary DP pools for volume allocation. You can examine primary tab DP pool and
volume details with links. You can accept the DP pools selected for secondary volumes, or make a manual selection by clicking  Select
Pool  to list and select eligible DP pools, and selecting eligible volumes
from the DP pools.
c. In  LUN Path Options :
Edit LUN paths from secondary storage ports to hosts. Under  LUN
Path Setting Information on Primary Site , you will see the
primary storage system, and No. of LUN Paths per volume. Clicking
the link will display primary storage system mapping information.
d. Click  Host Group and LUN settings  for further configuration.
e. In  Pair management Server Settings :
Select an available host as the pair management server. For Instance
ID, click  Existing  to use a current configuration definition file and
related instance ID number on the pair management server, or click292Replicating volumes for continuous accessHitachi Command Suite User Guide 
						

							New to create a new configuration definition file, and enter a new
instance ID number which will be validated as an available instance
ID. You can also specify a  UDP Port number for the instance.
7. Click  Virtual ID Settings  for further configuration.
These settings are displayed only in a configuration where options other
than the default virtual storage machine are used on the primary side.
8. In Pair Settings :
Select the  Quorum Disk , select new or existing in the  Copy Group for
management purposes, and then manually enter a name (Prefix and
Start Sequence No.) or select Automatic for  Pair Name and a name will
be created.
9. Click  Show Plan  and confirm that the information in the plan summary
is correct. If changes are required, click  Back.
10. (Optional) Update the task name and provide a description.
11. (Optional) Expand  Schedule to specify the task schedule.
You can schedule the task to run immediately or later. The default setting
is  Now .
12. Click Submit.
If the task is scheduled to run immediately, the process begins.
13. (Optional) Check the progress and result of the task on the  Tasks &
Alerts  tab. Click the task name to view details of the task.
14. Confirm the global-active device pair is allocated.
Result
The global-active device pair is allocated to the target host, and initial copy
performed. Reclaiming zero pages is also automatically performed.
Related tasks
•
Allocating global-active device pairs using existing volumes  on page 293
•
Adding redundancy to open-allocated volumes  on page 295
•
Editing LUN paths  on page 224
Related references
•
Allocate Volumes dialog box  on page 200
Allocating global-active device pairs using existing volumes Select an existing allocated global-active device volume, and allocate a
global-active device pair using the characteristics of the selected primary or secondary volume.
Procedure 1. On the  Resources  tab, select a global-active device volume from the
Open-Allocated  volume list, or for a specific host using global-active
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							device paired volumes, select an already allocated volume to use in a
new global-active device pair, and click  Allocate Like Volumes.Tip: Regardless of whether the primary volume (P-VOL) or the secondary
volume (S-VOL) is selected as the existing volume, the settings for the
existing P-VOL are used for the newly allocated primary volume and the
settings for the existing S-VOL are used for the newly allocated
secondary volume.
However, if characteristics such as drive type and drive speed of the
existing volumes do not match between the primary and secondary
storage systems, a secondary volume whose characteristics match those
of the primary volume is recommended.
2. In the  Allocate Like Volumes  dialog box, verify the information for the
selected volume and make any necessary changes.
3. On the  Primary  tab, configure the following options:
a. Select the primary  Storage system, Virtual Storage Machine , and
Volume type  (HDP or HDT).
Only valid storage and virtual storage machine information is
displayed. If volume type is HDP, select the  Volume location. If
volume type is HDT, the  Volume Selection options are displayed. You
cannot allocate Basic volumes.
b. Click  Advanced Options  for further configuration.
c. In  LUN Path Options :
Edit LUN paths from primary storage ports to hosts.
d. Click  Host Group and LUN settings  for further configuration.
e. In  Pair Management Server Settings :
Select an available host as the pair management server. For Instance
ID, click  Existing  to use a current configuration definition file and
related instance ID number on the pair management server, or click New  to create a new configuration definition file, and enter a new
instance ID number which will be validated as an available instance
ID. You can also specify a  UDP Port number for the instance.
4. On the  Secondary  tab, configure the following options:
a. Select the secondary  Storage system, Virtual Storage Machine ,
and  Volume type  (HDP or HDT):
Virtual storage machine information defaults to the primary tab value.
b. In  Advanced Options :
Unlike the Primary tab, select DP pools for the secondary storage system (Pools for S-VOL) that correspond to the DP pools configuredon the primary tab (Pools for P-VOL). For example, automatic selection
of DP volumes will display primary DP pools, and eligible secondary DP pools for volume allocation. You can examine primary tab DP pool and
volume details with links. You can accept the DP pools selected for
secondary volumes, or make a manual selection by clicking  Select
294Replicating volumes for continuous accessHitachi Command Suite User Guide 
						

							Pool to list and select eligible DP pools, and selecting eligible volumes
from the DP pools.
c. In  LUN Path options :
Edit LUN paths from secondary storage ports to hosts.  LUN Path
Setting Information on Primary Site  lists the primary storage
system, and No. of LUN Paths per volume. Click the link to display primary storage system mapping information.
d. Click  Host Group and LUN settings  for further configuration.
e. Click  Pair Management Server Settings  for further configuration.
5. Click  Virtual ID Settings  for further configuration.
These settings display only when options other than the default virtual storage machine are used on the primary storage.
6. In Pair Settings :
Select the  Quorum Disk , select new or existing in the  Copy Group for
management purposes, and then manually enter a name (Prefix and Start Sequence No.) or select Automatic for  Pair Name and a name will
be created.
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 .
10. Click Submit.
If the task is scheduled to run immediately, the process begins.
11. (Optional) Check the progress and result of the task on the  Tasks &
Alerts  tab. Click the task name to view details of the task.
12. Confirm the global-active device paired volumes are allocated.
Result
The global-active device pair is allocated to the target host, and initial copy
performed. Reclaiming zero pages is also automatically performed.
Related tasks
•
Allocating global-active device pairs  on page 291
•
Adding redundancy to open-allocated volumes  on page 295
•
Editing LUN paths  on page 224
Related references
•
Allocate Volumes dialog box  on page 200
Adding redundancy to open-allocated volumes Existing open-allocated volumes in the same storage system belonging to thesame host group (with the same LUN paths) can be converted to P-VOLs, and
the P-VOL data migrated to S-VOLs to create a global-active device pair.
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							Procedure1. On the  Resources  tab, or by searching, locate allocated volumes to
convert into global-active device pairs.
2. Select the volume, and click  Change to Global-Active Device
Volumes .
The  Change to Global-Active Device Volumes  window is displayed.
3. On the  Primary  tab, configure the following options:
a. Verify the displayed hosts, storage systems virtual storage machines
for the selected volumes.
b. Selected Volumes  are allocated volumes eligible to become a P-VOL
in a global-active device pair. Details such as WWN, host group, and
volume characteristics are displayed.
c. In  Pair Management Server Settings :
Select an available host as the pair management server. For Instance
ID, select  Existing to use a current configuration definition file and
related instance ID number on the pair management server, or select New  to create a new configuration definition file, and enter a new
instance ID number which will be validated as an available instance
ID. You can also specify a  UDP Port number for the instance.
4. On the  Secondary  tab, configure the following options:
a. Verify the displayed host(s) for the selected volumes, and click  Select
other Hosts  to specify more hosts that can access global-active
device pairs.
b. Select the secondary storage system where the S-VOLs will be
created.
c. Verify the displayed virtual storage machine.
d. Click  Advanced Options  for further configuration.
e. Click  LUN Path Options  for further configuration.
The previously allocated primary path is displayed.
f. Click  Host Group and LUN settings  for futher configuration.
g. In  Pair Management Server Settings :
Select an available host as the pair management server. For Instance
ID, select  Existing to use a current configuration definition file and
related instance ID number on the pair management server, or select
New  to create a new configuration definition file, and enter a new
instance ID number which will be validated as an available instance
ID. You can also specify a  UDP Port number for the instance.
5. In Pair Settings :
Select the  Quorum Disk , whether pairs should belong to a new or
existing  Copy Group  for management purposes, and enter a  Pair Name
manually (Prefix and Start Sequence No.), or select Automatic and a
name will be created.
6. Click  Show Plan  and confirm that the information in the plan summary
is correct. If changes are required, click  Back.296Replicating volumes for continuous accessHitachi Command Suite User Guide 
						

							7.(Optional) Update the task name and provide a description.
8. (Optional) Expand  Schedule to specify the task schedule.
You can schedule the task to run immediately or later. The default setting
is  Now .
9. Click  Submit.
If the task is scheduled to run immediately, the process begins.
10. (Optional) Check the progress and result of the task on the  Tasks &
Alerts  tab. Click the task name to view details of the task.
11. Confirm the global-active device paired volumes are created by checking
volume status information.
Result
The global-active device pair has been created from open-allocated volumes, and initial copy performed. Reclaiming zero pages is also automatically performed.
Related tasks •
Allocating global-active device pairs  on page 291
•
Allocating global-active device pairs using existing volumes  on page 293
•
Editing LUN paths  on page 224
Related references
•
Allocate Volumes dialog box  on page 200
Checking global-active device pair status You can review information (including status) of global-active device pairs or
reserved volumes from the volume list and volume details windows in HCS.
Note:  You can also use Replication Manager to check global-active device
pair status. Open Tools > Replication Manager and locate copy groups or pairs to view pair status. For more information about pair status, conditionsunder which certain copy pair statuses can be changed, and about how tochange the status of a copy pair by using the Change Pair Status wizard see
the Replication Manager help.
Procedure
1. Review global-active device status using one or more of the following
options:
• On the  Resources  tab, select  Storage Systems , select a Virtual
Storage Platform G1000, select  Volumes, and then list  Open-
Allocated  volumes to view global-active device information, as
follows:
- Volume Attribute
- Copy Info (P-VOL)
- Copy Info (S-VOL)
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							- GAD StatusTip: You might need to configure column settings to see global-active
device information.
Click volume links to view detailed information for global-active device
pairs, Quorum disks, and command devices.
• On the  Resources  tab, select  Hosts, select an operating system,
then select a host using global-active device pairs, and review volume status.
• Search for hosts or volumes to locate global-active device volumes, and review volume status.
Result
The status of global-active device pairs is displayed.
Related tasks
•
Monitoring global-active device pair performance  on page 299
•
Protecting global-active device pairs  on page 298
Protecting global-active device pairs Using Replication Manager, configure in-system replication to furthersafeguard the data on global-active device pairs in use by hosts on primaryand secondary storage systems.
Prerequisites
• The copy type is ShadowImage or Thin Image.
• The authentication mode is valid for the command device allocated to the pair management server.
• If the primary and secondary storage systems are managed by one pair management server, you cannot use the virtual IDs of the virtual storage
machine used by the global-active device pair. To use virtual IDs, a
dedicated pair management server is required for each storage system.
Procedure 1. On the global task bar, from the  Tools menu, select  Replication
Manager .
2. Select a global-active device volume and click  Pair Management.
The Pair Configuration Wizard opens.
3. In the  Copy Topology  window, select the P-VOL, click  Add Group, and
in the  Add Pair Group  dialog box, select  SI as the copy type. Click OK.
The  Copy Topology  window graphically reflects the addition of the SI
pair group to the P-VOL.
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							Note: When you add a copy group to an existing copy pair, it is known as
a  multi-target  configuration when created on the primary side and a
cascade  on the secondary side. For more information, see the  Hitachi
Command Suite Replication Manager User Guide .
4.In the  Copy Topology  window, select the S-VOL, click  Add Group, in
the  Add Pair Group  dialog box, select  SI as the copy type, and then
click  OK.
The  Copy Topology  window graphically reflects the addition of the SI
pair group to the S-VOL.
Tip:  On the  My Copy Groups  tab, you can perform pair operations by
clicking the icon for SI (which displays SI pair information), and clicking
Change Pair Status .
5.Select the  Finish page in the Pair Configuration Wizard to complete the
task.
Result
The global-active device pair is further protected with in-system SI replication.
Related tasks •
Checking global-active device pair status  on page 297
Monitoring global-active device pair performance Hitachi Tuning Manager will collect and display performance information for
global-active device pairs. If an administrator suspects a performance problem, or receives an alert indicating a performance problem, the
administrator can investigate and resolve the issue.
Because global-active device pairs are kept synchronized, I/O issues on
either the primary or secondary storage system can impact host
performance. Status information and I/O metrics related to P-VOL and S-VOL
performance can be examined to identify the problem, and resolve host I/O issues.
Prerequisites
• Hitachi Tuning Manager must be installed, licensed and configured. • When selecting one member of a global-active device pair, a single Device Manager managing the pair is required for analyzing the performance of
the P-VOL and S-VOL simultaneously.
Procedure 1. On the  Analytics  tab, open the  Hosts tree, select a host OS, and then
select the target host as follows:
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							a.Select the radio button next to the target host name, and then click
Identify Performance Problems .
b. Click  Host Name  to select target host volumes, and then click
Identify Performance Problems .Tip: When you select volumes from a host volume list or from within the
Identify Performance Problems  wizard, if you select a global-active
device volume in a single Device Manager environment, the P-VOL and
S-VOL will both be targets for analysis. To identify global-active device
volumes, use  Column Settings  to include Copy Info (P-VOL) , Copy
Info (S-VOL) , GAD Pair Status , and Virtual LDEV ID  in the host
volume list or the Identify Performance Problems wizard.
The  Identify Performance Problems  wizard is displayed (starting on
the Introduction page). Review displayed messages.
2. Click  Next.
3. On the  Target Selection  page:
a. If prompted, select the  Storage system type/volume type
(location) , for example VSP G1000 and DP volumes.
b. Click  List of added volumes  to view analysis targets, including
global-active device volumes.
Note:  When the global-active device pair (P-VOL and S-VOL) of a
selected global-active device volume are not found in HCS, the volume
cannot be set to a target for analysis. These volumes are listed
separately.
c. In  Select volumes to analyze , Select all  selects all listed volumes
for analysis. Click  Select manually to individually select volumes or
global-active device pairs (P-VOL and S-VOL) for analysis, and then
click  Add to update the  Selected Volumes  list.
d. For  Select time period to analyze within 30 days before the
current time , configure the time period to analyze.
e. Click  Next.
4. On the  Overview  page:
a. Check the analysis results and cautions. If there is a resource that
exceeds a threshold value, there might be a performance issue related
to the storage system.
b. Click  Next.
5. On the  Volume  page:
a. Review the  Response Time  and IOPS  graphs displaying both P-VOL
and S-VOL performance metrics.
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