Administering sites and remote mirrors

Site-based allocation of storage to volumes

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Note: If the Site Awareness license is installed on all the hosts in the Remote Mirror configuration, and site consistency is enabled on a volume, the vxassist command attempts to allocate storage across the sites that are registered to a disk group. If not enough storage is available at all sites, the command fails unless you also specify the allsites=off attribute.

By default, the allsites attribute is set to on for volume in a site-consistent disk group. The allsites and siteconsistent attributes must be set to off for RAID-5 volumes in a site-consistent disk group.

In a similar way to mirroring across controllers, you can also ensure that plexes are created at all sites that are registered for a disk group:

#vxassist -g diskgroup make volume size mirror=site

The allsites and siteconsistent attributes can be combined to create a non-site-consistent mirrored volume with plexes only at some of the sites:

#vxassist -g diskgroup make volume size mirror=site \ site:site1 site:site2 ... allsites=off siteconsistent=off

a non-site-consistent mirrored volume with plexes at all of the sites:

#vxassist -gdiskgroup make volume size mirror=site \ allsites=on siteconsistent=off

a site-consistent mirrored volume with plexes only at some of the sites:

#vxassist -g diskgroup make volume size mirror=site \ site:site1 site:site2 ... allsites=off siteconsistent=on

or a site-consistent mirrored volume with plexes at all of the sites:

#vxassist -gdiskgroup make volume size mirror=site \ allsites=on siteconsistent=on

By default, the number of mirrors created is equal to the number of sites that are configured in the disk group. There should be a minimum of 2 plexes at each site. To override the default behavior, use the nmirror attribute to specify the total number of mirrors:

#vxassist -g diskgroup make volume size mirror=site \ nmirror=4 site:site1 site:site2 ... [allsites={onoff}] \ [siteconsistent={onoff}]

If a volume is intended to be site consistent, the number of plexes that are specified must be a multiple of the number of sites.

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HP Veritas Volume Manager 5.0 -UX 11i v3 manual # vxassist -g diskgroup make volume size mirror=site