Veritas Storage Foundation Intelligent Storage Provisioning 5.0 Solutions Guide, HP-UX 11i v3, First Edition, May 2008

23Tiered storage solutions

Setting up tiered storage using ISP volumes

To establish a storage tier using ISP volumes in a volume set

1 Use the

vxdiskadm command or the GUI to create the disk group that will be

used to hold the tiered volumes and the volume set to which they will be

added. Add all the disks that are required to this disk group.

2 Define the rules to categorize the disks into storage tiers. This can be done

by disk vendor, array model, or by using the

vxdisk settag command to

apply appropriate tags to the disks. The following example assigns cost tags

to disks from three different arrays:

# vxdisk -g dstdg settag cost=gold emc1_1 emc1_2

# vxdisk -g dstdg settag cost=silver hds1_1 hds1_2

# vxdisk -g dstdg settag cost=bronze jbod1_1 jbod1_2 jbod1_3

3 Use the vxpool command to create a storage pool in the disk group, for

example:

# vxpool -g dstdg create dstpool autogrow=diskgroup \

selfsufficient=pool

4 If required, define the capabilities, rules and templates that are required to

express the storage services that are to be provided by each tier. For

example, you can create new volume templates that associate the correct

tier tag for the class of storage that is used. The following is an example of

such a template definition:

volume_template SilverStorage {

extends DataMirroringPrefabricatedStriping

rules {

tag "tier"="silver"

confineto "cost"="silver"

}

};

Use the vxtemplate command to install your template definition file in the

ISP configuration database:

# vxtemplate -C -d

dst_template_file

install

Use the vxpool command to associate your templates and any others that

you require with the storage pool, as shown in this example.

# vxpool -g mydg assoctemplate dstpool \

template=GoldStorage,SilverStorage,BronzeStorage

5 You can now create the volumes. The following command would use the

template to create a 20-gigabyte mirrored volume with 2 mirrors composed

of LUNs striped in hardware, and with the mirrors located on separate

enclosures:

# vxassist -g dstdg make silvervol 20g \

volume_template=’SilverStorage,\

MirrorsOnSeparateComponents’