Example: Configuring an SRDF Replication Group for Sun Cluster
This example completes the Sun Cluster specific steps necessary to set up SRDF replication in your cluster. The example assumes that you have already performed the following tasks:
-
Completed pairing LUNS for replication between arrays.
-
Installed the SRDF software on your storage device and cluster nodes.
This example involves a four-node cluster where two nodes are connected to one symmetrix and the other two nodes are connected to the second symmetrix. The SRDF device group is called dg1.
Example 5–15 Creating Replica Pairs
Run the following command on all nodes.
# symcfg discover
! This operation might take up to a few minutes.
# symdev list pd
Symmetrix ID: 000187990182
Device Name Directors Device
--------------------------- ------------ --------------------------------------
Cap
Sym Physical SA :P DA :IT Config Attribute Sts (MB)
--------------------------- ------------- -------------------------------------
0067 c5t600604800001879901* 16D:0 02A:C1 RDF2+Mir N/Grp'd RW 4315
0068 c5t600604800001879901* 16D:0 16B:C0 RDF1+Mir N/Grp'd RW 4315
0069 c5t600604800001879901* 16D:0 01A:C0 RDF1+Mir N/Grp'd RW 4315
...
|
On all nodes on the RDF1 side, type:
# symdg -type RDF1 create dg1 # symld -g dg1 add dev 0067 |
On all nodes on the RDF2 side, type:
# symdg -type RDF2 create dg1 # symld -g dg1 add dev 0067 |
Example 5–16 Verifying Data Replication Setup
From one node in the cluster, type:
# symdg show dg1
Group Name: dg1
Group Type : RDF1 (RDFA)
Device Group in GNS : No
Valid : Yes
Symmetrix ID : 000187900023
Group Creation Time : Thu Sep 13 13:21:15 2007
Vendor ID : EMC Corp
Application ID : SYMCLI
Number of STD Devices in Group : 1
Number of Associated GK's : 0
Number of Locally-associated BCV's : 0
Number of Locally-associated VDEV's : 0
Number of Remotely-associated BCV's (STD RDF): 0
Number of Remotely-associated BCV's (BCV RDF): 0
Number of Remotely-assoc'd RBCV's (RBCV RDF) : 0
Standard (STD) Devices (1):
{
--------------------------------------------------------------------
Sym Cap
LdevName PdevName Dev Att. Sts (MB)
--------------------------------------------------------------------
DEV001 /dev/rdsk/c5t6006048000018790002353594D303637d0s2 0067 RW 4315
}
Device Group RDF Information
...
# symrdf -g dg1 establish
Execute an RDF 'Incremental Establish' operation for device
group 'dg1' (y/[n]) ? y
An RDF 'Incremental Establish' operation execution is
in progress for device group 'dg1'. Please wait...
Write Disable device(s) on RA at target (R2)..............Done.
Suspend RDF link(s).......................................Done.
Mark target (R2) devices to refresh from source (R1)......Started.
Device: 0067 ............................................ Marked.
Mark target (R2) devices to refresh from source (R1)......Done.
Merge device track tables between source and target.......Started.
Device: 0067 ............................................ Merged.
Merge device track tables between source and target.......Done.
Resume RDF link(s)........................................Started.
Resume RDF link(s)........................................Done.
The RDF 'Incremental Establish' operation successfully initiated for
device group 'dg1'.
#
# symrdf -g dg1 query
Device Group (DG) Name : dg1
DG's Type : RDF2
DG's Symmetrix ID : 000187990182
Target (R2) View Source (R1) View MODES
-------------------------------- ------------------------ ----- ------------
ST LI ST
Standard A N A
Logical T R1 Inv R2 Inv K T R1 Inv R2 Inv RDF Pair
Device Dev E Tracks Tracks S Dev E Tracks Tracks MDA STATE
-------------------------------- -- ------------------------ ----- ------------
DEV001 0067 WD 0 0 RW 0067 RW 0 0 S.. Synchronized
Total -------- -------- -------- --------
MB(s) 0.0 0.0 0.0 0.0
Legend for MODES:
M(ode of Operation): A = Async, S = Sync, E = Semi-sync, C = Adaptive Copy
D(omino) : X = Enabled, . = Disabled
A(daptive Copy) : D = Disk Mode, W = WP Mode, . = ACp off
#
|
Example 5–17 Displaying DIDs Corresponding to the Disks Used
The same procedure applies to the RDF1 and RDF2 sides.
You can look under the PdevName field of output of the dymdg show dg command.
On the RDF1 side, type:
# symdg show dg1
Group Name: dg1
Group Type : RDF1 (RDFA)
...
Standard (STD) Devices (1):
{
--------------------------------------------------------------------
Sym Cap
LdevName PdevName Dev Att. Sts (MB)
--------------------------------------------------------------------
DEV001 /dev/rdsk/c5t6006048000018790002353594D303637d0s2 0067 RW 4315
}
Device Group RDF Information
...
|
To obtain the corresponding DID, type:
# scdidadm -L | grep c5t6006048000018790002353594D303637d0 217 pmoney1:/dev/rdsk/c5t6006048000018790002353594D303637d0 /dev/did/rdsk/d217 217 pmoney2:/dev/rdsk/c5t6006048000018790002353594D303637d0 /dev/did/rdsk/d217 # |
To list the corresponding DID, type:
# cldevice show d217 === DID Device Instances === DID Device Name: /dev/did/rdsk/d217 Full Device Path: pmoney2:/dev/rdsk/c5t6006048000018790002353594D303637d0 Full Device Path: pmoney1:/dev/rdsk/c5t6006048000018790002353594D303637d0 Replication: none default_fencing: global # |
On the RDF2 side, type:
You can look under the PdevName field of output of dymdg show dg command.
# symdg show dg1
Group Name: dg1
Group Type : RDF2 (RDFA)
...
Standard (STD) Devices (1):
{
--------------------------------------------------------------------
Sym Cap
LdevName PdevName Dev Att. Sts (MB)
--------------------------------------------------------------------
DEV001 /dev/rdsk/c5t6006048000018799018253594D303637d0s2 0067 WD 4315
}
Device Group RDF Information
...
|
To obtain the corresponding DID, type:
# scdidadm -L | grep c5t6006048000018799018253594D303637d0 108 pmoney4:/dev/rdsk/c5t6006048000018799018253594D303637d0 /dev/did/rdsk/d108 108 pmoney3:/dev/rdsk/c5t6006048000018799018253594D303637d0 /dev/did/rdsk/d108 # |
To list the corresponding DID, type:
# cldevice show d108 === DID Device Instances === DID Device Name: /dev/did/rdsk/d108 Full Device Path: pmoney3:/dev/rdsk/c5t6006048000018799018253594D303637d0 Full Device Path: pmoney4:/dev/rdsk/c5t6006048000018799018253594D303637d0 Replication: none default_fencing: global # |
Example 5–18 Combining DID instances
From the RDF2 side, type:
# cldevice combine -t srdf -g dg1 -d d217 d108 # |
Example 5–19 Displaying the Combined DIDs
From any node in the cluster, type:
# cldevice show d217 d108 cldevice: (C727402) Could not locate instance "108". === DID Device Instances === DID Device Name: /dev/did/rdsk/d217 Full Device Path: pmoney1:/dev/rdsk/c5t6006048000018790002353594D303637d0 Full Device Path: pmoney2:/dev/rdsk/c5t6006048000018790002353594D303637d0 Full Device Path: pmoney4:/dev/rdsk/c5t6006048000018799018253594D303637d0 Full Device Path: pmoney3:/dev/rdsk/c5t6006048000018799018253594D303637d0 Replication: srdf default_fencing: global # |
- © 2010, Oracle Corporation and/or its affiliates