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Sun Cluster Geographic Edition System Administration Guide

How to Detect Data Replication Errors

When an error occurs at the data replication level, the error is reflected in the status of the resource in the replication resource group of the relevant device group.

For information about how different Resource status values map to actual replication pair states, see Table 10–6.

You can check the status of the replication resources by using the scstat -g command as follows:


phys-paris-1# scstat -g

Running the scstat -g command might return the following:


...

--Resources --
            Resource Name       Node Name           State         Status Message
            -------------       ---------           -----         --------------
Resource: r-tc-tcpg1-devgroup1  phys-paris-2        Offline       Offline
Resource: r-tc-tcpg1-devgroup1  phys-paris-1        Online        Faulted - P-VOL:PSUE

Resource: hasp4nfs              phys-paris-1        Offline       Offline
Resource: hasp4nfs              phys-paris-2        Offline       Offline

...

The aggregate resource status for all device groups in the protection group is given by using the geoadm status command. For example, the output of the scstat -g command in the preceding example, indicates that the Hitachi TrueCopy device group, devgroup1, is in the PSUE state on cluster-paris. Table 10–6 indicates that the PSUE state corresponds to a resource status of FAULTED. So, the data replication state of the protection group is also FAULTED. This state is reflected in the output of the geoadm status command, which display the state of the protection group as Error.


phys-paris-1# geoadm status
Cluster: cluster-paris

Partnership "paris-newyork-ps"  : OK
   Partner clusters             : cluster-newyork
   Synchronization              : OK      

   Heartbeat "paris-to-newyork" monitoring "cluster-newyork": OK 
      Heartbeat plug-in "ping_plugin"             : Inactive
      Heartbeat plug-in "icrm_plugin"             : OK
      Heartbeat plug-in "tcp_udp_plugin"          : OK

Protection group "tcpg"   : Error
      Partnership         : paris-newyork-ps
      Synchronization     : OK

      Cluster cluster-paris    : Error
         Role                  : Primary
         PG activation state   : Activated
         Configuration         : OK
         Data replication      : Error
         Resource groups       : OK 
   
      Cluster cluster-newyork  : Error
         Role                  : Secondary
         PG activation state   : Activated
         Configuration         : OK
         Data replication      : Error
         Resource groups       : OK

Pending Operations
      Protection Group         : "tcpg"
      Operations               : start