InfoScale™ 9.0 Replication Administrator's Guide - AIX

Displaying the status of a Secondary

Use the vxrlink status command to determine the status of a Secondary. This command displays different information depending on what state the replication is in for that Secondary. For example, whether the Primary is currently replicating to the Secondary, synchronizing the Secondary with a Storage Checkpoint, using the DCM to resynchronize the Secondary, or using automatic synchronization for the Secondary. To determine the state of the replication, use the vradmin repstatus command.

See Displaying consolidated replication status.

If the state is replicating, the vxrlink status command displays whether the Secondary corresponding to the specified RLINK is up-to-date and if not, how much the Secondary is behind.

Note that outstanding writes are shown even if the Secondary is replicating in synchronous mode. Although for synchronous mode, the write is considered complete to the application when the network acknowledgment is received from the Secondary, VVR still considers the write outstanding until it is written to the data volume on the Secondary.

If automatic synchronization or DCM resynchronization is in progress, the vxrlink status command shows the progress of the automatic synchronization.

To show the status of a Secondary

# vxrlink -g diskgroup status rlink_name

If replication is in progress, the output resembles:

VxVM VVR vxrlink INFO V-5-1-4640 Rlink rlink_name has <x> outstanding 
writes, occupying <y> Kbytes (17%) on the SRL

If automatic synchronization is in progress, the output resembles:

VxVM VVR vxrlink INFO V-5-1-4464 Rlink rlink_name is in AUTOSYNC. 
100864 Kbytes remaining.

If DCM resynchronization is in progress, the output resembles:

VxVM VVR vxrlink INFO V-5-1-12887 DCM is in use on Rlink rlink_name.
DCM contains 7200 Kbytes (1%) of the Data Volume(s).

To display the Secondary status periodically, specify a time interval using the -I option. For example, to print the status of the Secondary every five seconds, use the command:

# vxrlink -g diskgroup -i5 status rlink_name

If replication is in progress, the output resembles:

VxVM VVR vxrlink INFO V-5-1-4640 Rlink rlink_name has <x>
outstanding writes, occupying <y> Kbytes (17%) on the SRL
VxVM VVR vxrlink INFO V-5-1-4640 Rlink rlink_name has <x>
outstanding writes, occupying <y> Kbytes (19%) on the SRL

If automatic synchronization is in progress, the output resembles:

VxVM VVR vxrlink INFO V-5-1-4464 Rlink rlink_name is in
AUTOSYNC. 100864 Kbytes remaining.
VxVM VVR vxrlink INFO V-5-1-4464 Rlink rlink_name is in
AUTOSYNC. 94464 Kbytes remaining.

If automatic synchronization is in progress and SmartMove is enabled, the output resembles:

VxVM VVR vxrlink INFO V-5-1-0 Rlink rlink_name is in SMART
AUTOSYNC. 2425696 Kbytes remaining.
VxVM VVR vxrlink INFO V-5-1-0 Rlink rlink_name is in SMART
AUTOSYNC. 2367840 Kbytes remaining.

To display the status of an RLINK with a timestamp, use the vxrlink status command with the -T option. This is useful if the Secondary is not up-to-date. The output of the command displays a timestamp in the locale's appropriate time format to indicate the time by which the Secondary is behind.

For example, if there are pending writes in the Primary SRL, use the following command to check the status of the Primary:

# vxrlink -g diskgroup -T status rlink_name

The output resembles:

VxVM VVR vxrlink INFO V-5-1-4640 Rlink rlink_name has <x> 
outstanding writes, occupying <y> Kbytes (20%) on the SRL
VxVM VVR vxrlink INFO V-5-1-0 Rlink rlink_name is behind by 0:00:40 hours

The second message indicates the time by which the RLINK is behind.