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Sun Cluster Geographic Edition Data Replication Guide for Hitachi TrueCopy and Universal Replicator

Configuring the /etc/horcm.conf File on the Nodes of the Secondary Cluster

For more information about how to configure the /etc/horcm.conf file, see the documentation for Hitachi TrueCopy and Universal Replicator.

On each node of the secondary cluster, you must configure the /etc/horcm.conf file with the same Hitachi TrueCopy or Universal Replicator device group names and device names that are configured on the primary cluster, and assign them to LUNs and to journal volumes on the local shared storage array.

Table 1–4 and Table 1–5 show the entries in the /etc/horcm.conf file on the nodes of the secondary cluster for the device groups configured on the primary cluster in Configuring the /etc/horcm.conf File on the Nodes of the Primary Cluster. Table 1–4 shows the HORCM_LDEV parameter configured with two locally attached LUNs, designated by their serial numbers and logical device (ldev) numbers, and associated with a journal ID, as they were on the primary cluster.

Note –

If you want to ensure the consistency of replicated data with Hitachi Universal Replicator on both the primary cluster and the secondary cluster, you must specify a journal volume ID in the third property configuration field of HORCM_LDEV for each device in a Hitachi Universal Replicator device group. Otherwise, journaling does not occur and Hitachi Universal Replicator's functionality in Sun Cluster Geographic Edition configurations is no greater than the functionality of Hitachi TrueCopy.

Table 1–4 Example HORCM_LDEV Section of the /etc/horcm.conf File on the Secondary Cluster

# dev_group

dev_name

serial#:jid#

ldev

devgroup1

pair1

10132:1

00:14

devgroup1

pair2

10132:1

00:15

The following table shows the HORCM_DEV parameter configured with two LUNs designated by their port, CL1-C, target 0, and LU numbers 22 and 23.

Table 1–5 Example HORCM_DEV Section of the /etc/horcm.conf File on the Secondary Cluster

# dev_group

dev_name

port number

TargetID

LU number

MU number

devgroup2

pair3

CL1–C

0

22

 

devgroup2

pair4

CL1–C

0

23

 

After you have configured the /etc/horcm.conf file on the secondary cluster, you can view the status of the pairs by using the pairdisplay command as follows:


phys-paris-1# pairdisplay -g devgroup1
Group PairVol(L/R) (Port#,TID,LU),Seq#,LDEV#,P/S,Status,Fence,Seq#,P-LDEV# M
devgroup1 pair1(L) (CL1-A , 0, 1) 54321 1..  SMPL ----  ------,----- ----  -
devgroup1 pair1(R) (CL1-C , 0, 20)12345 609..SMPL ----  ------,----- ----  -
devgroup1 pair2(L) (CL1-A , 0, 2) 54321 2..  SMPL ----  ------,----- ----  -
devgroup1 pair2(R) (CL1-C , 0, 21)12345 610..SMPL ----  ------,----- ----  -