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Managing Host Autonomic Groups, Creating Host Sets, Adding Hosts to Host Sets, Modifying Host Sets,

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Managing Host Autonomic Groups Hosts can be combined into autonomic groups. Autonomic groups are sets of objects that can be managed as one object. If you have a group of hosts in a cluster and all the hosts require the same administrative procedures, it is easier to group those hosts into a set and manage them together. Individual hosts can be members of multiple host sets. Hosts added to a set inherit the rights of that set. For example, if a virtual volume is exported to a group of hosts and a new host is added to the host set, the new host can see the virtual volume as soon as it is added to the host set. The opposite is also true. If a host is removed from a set, all the rights of that host set are revoked for the removed host. A host in a host set cannot be removed from the system until it has been removed from the host set, or until the host set is removed from the system. Removing a host set does not remove the hosts in that set. Changing the name of a host in a set does not change the rights of the host or remove it from the host set. Creating Host Sets Any hosts added to the host set automatically see all VLUNs available to the host set, provided there are no conflicting LUN IDs. If the added host has an exported LUN ID in the LUN ID range of the host set, the host cannot see the LUN and must be assigned a new ID. For more information about VLUN templates, see "Exporting Virtual Volumes" (page 90). To create a host set, issue the createhostset command, where: • is the name of the host set being created. • are the names of the hosts included in the host set. For a complete list of options available for the createhostset command, see the HP 3PAR Command Line Interface Reference and the HP 3PAR CLI Help. Adding Hosts to Host Sets To add a host to an existing host set, issue the createhostset -add command, where: • is the name of the host set that will include the added hosts. • are the names of the hosts being added to the host set. For a complete list of options available for the createhostset command, see the HP 3PAR Command Line Interface Reference and the HP 3PAR CLI Help. Modifying Host Sets To change the name of a host set, issue the sethostset -name command, where: • is the new name of the host set. • is the name of the host set being modified. For a complete list of options available for the sethostset command, see the HP 3PAR Command Line Interface Reference and the HP 3PAR CLI Help. Removing Host Sets If a host is removed from a host set, the removed host loses all the rights of the host set and cannot access volumes exported to the host set. Managing Host Autonomic Groups 71

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Managing Host Autonomic Groups
Hosts can be combined into autonomic groups. Autonomic groups are sets of objects that can be
managed as one object. If you have a group of hosts in a cluster and all the hosts require the same
administrative procedures, it is easier to group those hosts into a set and manage them together.
Individual hosts can be members of multiple host sets.
Hosts added to a set inherit the rights of that set. For example, if a virtual volume is exported to a
group of hosts and a new host is added to the host set, the new host can see the virtual volume as
soon as it is added to the host set. The opposite is also true. If a host is removed from a set, all the
rights of that host set are revoked for the removed host.
A host in a host set cannot be removed from the system until it has been removed from the host
set, or until the host set is removed from the system. Removing a host set does not remove the hosts
in that set. Changing the name of a host in a set does not change the rights of the host or remove
it from the host set.
Creating Host Sets
Any hosts added to the host set automatically see all VLUNs available to the host set, provided
there are no conflicting LUN IDs. If the added host has an exported LUN ID in the LUN ID range
of the host set, the host cannot see the LUN and must be assigned a new ID. For more information
about VLUN templates, see
“Exporting Virtual Volumes” (page 90)
.
To create a host set, issue the
createhostset<set_name><host_names>
command, where:
<set_name>
is the name of the host set being created.
<host_names>
are the names of the hosts included in the host set.
For a complete list of options available for the
createhostset
command, see the
HP 3PAR
Command Line Interface Reference
and the HP 3PAR CLI Help.
Adding Hosts to Host Sets
To add a host to an existing host set, issue the
createhostset -add <set_name>
<host_names>
command, where:
<set_name>
is the name of the host set that will include the added hosts.
<host_names>
are the names of the hosts being added to the host set.
For a complete list of options available for the
createhostset
command, see the
HP 3PAR
Command Line Interface Reference
and the HP 3PAR CLI Help.
Modifying Host Sets
To change the name of a host set, issue the
sethostset -name <new_name> <set_name>
command, where:
<new_name>
is the new name of the host set.
<set_name>
is the name of the host set being modified.
For a complete list of options available for the
sethostset
command, see the
HP 3PAR Command
Line Interface Reference
and the HP 3PAR CLI Help.
Removing Host Sets
If a host is removed from a host set, the removed host loses all the rights of the host set and cannot
access volumes exported to the host set.
Managing Host Autonomic Groups
71