Filter
Top Products
435Administering sites and remote mirrors
Configuring site consistency on a disk group
The -f option allows the requirement to be removed if the site is detached or
offline.
The site name is not removed from the disks. If required, use the vxdisk rmtag
command to remove the site tag as described in “Configuring sites for hosts and
disks” on page 434.
Configuring site consistency on a disk group
Having configured site-based allocation on a disk group as described in
“Configuring site-based allocation on a disk group” on page 434, turn on the site
consistency requirement for a disk group by using the
vxdg command:
# vxdg -g diskgroup set siteconsistent=on
Note: This command does not set the siteconsistent attribute on existing
volumes in the disk group. Although newly created volumes inherit the setting
from the disk group, it does not change when the disk group setting is changed.
See “Configuring site consistency on a volume” on page 435.
All the disks in a disk group must be registered to one of the sites before you can
set the siteconsistent attribute on the disk group.
To verify whether site consistency has been enabled for a disk group, use the
following command:
# vxdg list diskgroup | grep siteconsistent
flags: siteconsistent
To turn off the site consistency requirement for a disk group, use the following
command:
# vxdg -g diskgroup set siteconsistent=off
Configuring site consistency on a volume
To set the site consistency requirement when creating a volume, specify the
siteconsistent attribute to the vxassist make command, for example:
# vxassist [-g diskgroup] make volume size \
nmirror=4 siteconsistent={on|off}
By default, a volume inherits the value that is set on its disk group.
Note: By default, creating a site-consistent volume also creates an associated
version 20 DCO volume, and enables Persistent FastResync on the volume. This
allows faster recovery of the volume during the reattachment of a site.