HP Veritas Volume Manager 5.0 -UX 11i v3 manual Setting the siteread policy on a volume

436

Administering sites and remote mirrors

Setting the siteread policy on a volume

To turn on the site consistency requirement for an existing volume, use the following form of the vxvol command:

#vxvol [-g diskgroup] set siteconsistent=on volume

To turn off the site consistency requirement for a volume, use the following command:

#vxvol [-g diskgroup] set siteconsistent=off volume

Note: The siteconsistent and allsites attributes must be set to off for

RAID-5 volumes in a site-consistent disk group.

Setting the siteread policy on a volume

If the Site Awareness license is installed on all the hosts in the Remote Mirror configuration, the disk group is configured for site consistency with several sites enabled, and the allsites=on attribute is specified for a volume, the default read policy is siteread.

If required, you can use the following command to set the siteread policy on a volume:

#vxvol [-g diskgroup] rdpol siteread volume

This command has no effect if a site name has not been set for the host.

See “Changing the read policy for mirrored volumes” on page 289.

Site-based allocation of storage to volumes

The vxassist command can be used to create volumes only from storage that exists at a specified site, as shown in this example:

#vxassist -gdiskgroup make volume size site:site1 \ [allsites={onoff}] [siteconsistent={onoff}]

The storage class site is used in similar way to other storage classes with the vxassist command, such as enclr, ctlr and disk.

See “Mirroring across targets, controllers or enclosures” on page 255.