How to Install and Configure a Two-Node Cluster
Using Oracle Solaris Cluster 4.0 on Oracle Solaris 11
by Subarna Ganguly and Jonathan Mellors, December 2011
How to quickly and easily install and configure Oracle Solaris Cluster software for two nodes, including configuring a quorum device.
Introduction
This article provides a step-by-step process for using the interactive scinstall
utility to install and configure Oracle Solaris Cluster software for two nodes, including the configuration of a quorum device. It does not cover the configuration of highly available services.
Note: For more details on how to install and configure other Oracle Solaris Cluster software configurations, see the Oracle Solaris Cluster Software Installation Guide.
The interactive scinstall
utility is menu-driven. The menus help reduce the chance of mistakes and promote best practices by using default values, prompting you for information specific to your cluster, and identifying invalid entries.
The scinstall
utility also eliminates the need to manually set up a quorum device by automating the configuration of a quorum device for the new cluster.
Note: This article refers to the Oracle Solaris Cluster 4.0 release. For more information about the latest Oracle Solaris Cluster release, see the release notes.
Prerequisites, Assumptions, and Defaults
This section discusses several prerequisites, assumptions, and defaults for two-node clusters.
Configuration Assumptions
This article assumes the following conditions are met:
- You are installing on Oracle Solaris 11 and you have basic system administration skills.
- You are installing Oracle Solaris Cluster 4.0 software.
- The cluster hardware is supported with Oracle Solaris Cluster 4.0 software. (See Oracle Solaris Cluster System Requirements. (PDF) )
- A two-node x86 cluster is installed. However, the installation procedure is applicable to SPARC clusters as well.
- Each node has two spare network interfaces to be used as private interconnects, also known as transports, and at least one network interface that is connected to the public network.
- SCSI shared storage is connected to the two nodes.
- Your setup looks like Figure 1, although you might have fewer or more devices, depending on your system or network configuration.
Note: It is recommended, but not required, that you have console access to the nodes during cluster installation.
Figure 1. Oracle Solaris Cluster Hardware Configuration
Prerequisites for Each System
This article assumes that Oracle Solaris 11 has been installed on both systems.
Initial Preparation of Public IP Addresses and Logical Host Names
You must have the logical names (host names) and IP addresses of the nodes that are to be configured as a cluster. Add those entries to each node's /etc/inet/hosts
file or to a naming service if a naming service, such as DNS, NIS, or NIS+ maps, is used.
The example in this article uses the NIS service and the configuration shown in Table 1.
Table 1. Configuration
COMPONENT | NAME | INTERFACE | IP ADDRESS |
---|---|---|---|
Cluster Name | phys-schost |
— | — |
Node 1 | phys-schost-1 |
nge0 |
1.2.3.4 |
Node 2 | phys-schost-2 |
nge0 |
1.2.3.5 |
Defaults
The scinstall
interactive utility in Typical mode installs the Oracle Solaris Cluster software with the following defaults:
- Private-network address 172.16.0.0
- Private-network netmask 255.255.248.0
- Cluster-transport switches
switch1
andswitch2
The example in this article has no cluster-transport switches. Instead, the private networking is resolved by using back-to-back cables.
In the example in this article, the interfaces of the private interconnects are nge1
and e1000g1
on both cluster nodes.
Preinstallation Checks
Perform the following steps.
In our example (with the NIS service), the /etc/inet/hosts
files are as follows.
On node 1:
# Internet host table
#
::1 phys-schost-1 localhost
127.0.0.1 phys-schost-1 localhost loghost
On node 2:
# Internet host table
#
::1 phys-schost-2 localhost
127.0.0.1 phys-schost-2 localhost loghost
In our example, there are two disks that are shared between the two nodes:
Listing 1. Verifying Shared Storage Is Available
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c4t0d0
/pci@7b,0/pci1022,7458@11/pci1000,3060@2/sd@0,0
/dev/chassis/SYS/HD0/disk
1. c4t1d0
/pci@7b,0/pci1022,7458@11/pci1000,3060@2/sd@1,0
/dev/chassis/SYS/HD1/disk
2. c0t600A0B800026FD7C000019B149CCCFAEd0
/scsi_vhci/disk@g600a0b800026fd7c000019b149cccfae
3. c0t600A0B800026FD7C000019D549D0A500d0
/scsi_vhci/disk@g600a0b800026fdb600001a0449d0a6d3
# more /etc/release
Oracle Solaris 11 11/11 X86
Copyright (c) 1983, 2011, Oracle and/or its affiliates. All rights reserved.
Assembled 26 September 2011
If the nodes are configured as static, proceed to the section Configuring the Oracle Solaris Cluster Publisher. Otherwise, continue with this procedure and do the following:
a. If the network interfaces are not configured as static IP addresses, on each node, run the command shown in Listing 2 to unconfigure all network interfaces and services.
Listing 2. Unconfigure the Network Interfaces and Services
# netadm enable -p ncp defaultfixed
Enabling ncp 'DefaultFixed'
phys-schost-1: Sep 27 08:19:19 phys-schost-1 in.ndpd[1038]: Interface net0 has been removed from
kernel. in.ndpd will no longer use it
Sep 27 08:19:19 phys-schost-1 in.ndpd[1038]: Interface net1 has been removed from kernel
. in.ndpd will no longer use it
Sep 27 08:19:19 phys-schost-1 in.ndpd[1038]: Interface net2 has been removed from kernel
. in.ndpd will no longer use it
Sep 27 08:19:20 phys-schost-1 in.ndpd[1038]: Interface net3 has been removed from kernel
. in.ndpd will no longer use it
Sep 27 08:19:20 phys-schost-1 in.ndpd[1038]: Interface net4 has been removed from kernel
. in.ndpd will no longer use it
Sep 27 08:19:20 phys-schost-1 in.ndpd[1038]: Interface net5 has been removed from kernel
. in.ndpd will no longer use it
b. Then, on each node, run the commands shown in Listing 3.
Listing 3. Commands to Run on Both Nodes
# svccfg -s svc:/network/nis/domain setprop config/domainname = hostname: nisdomain.example.com
# svccfg -s svc:/network/nis/domain:default refresh
# svcadm enable svc:/network/nis/domain:default
# svcadm enable svc:/network/nis/client:default
# /usr/sbin/svccfg -s svc:/system/name-service/switch setprop config/host = astring: \"files nis\"
# /usr/sbin/svccfg -s svc:/system/name-service/switch setprop config/netmask = astring: \"files nis\"
# /usr/sbin/svccfg -s svc:/system/name-service/switch setprop config/automount = astring: \"files nis\"
# /usr/sbin/svcadm refresh svc:/system/name-service/switch
c. On each node, bind back to the NIS server:
# beadm create Pre-Cluster-s11
# beadm list
BE Active Mountpoint Space Policy Created
-- ------ ---------- ----- ------ -------
Pre-Cluster-s11 - - 179.0K static 2011-09-27 08:51
s11 NR / 4.06G static 2011-09-26 08:50
- Temporarily enable
rsh
orssh
access forroot
on the cluster nodes. - Log in to the cluster nodes on which you are installing Oracle Solaris Cluster software and become superuser.
- On each node, verify the
/etc/inet/hosts
file entries. If no other name resolution service is available, add the name and IP address of the other node to this file. - On each node, verify that at least one shared storage disk is available, as shown in Listing 1.
c0t600A0B800026FD7C000019B149CCCFAEd0
c0t600A0B800026FD7C000019D549D0A500d0
- On each node, ensure the right OS version is installed:
- Ensure that the network interfaces are configured as static IP addresses (not DHCP or of type
addrconf
, as displayed by the commandipadm show-addr -o all
). # ypinit -c
d. Reboot each node to make sure the new network setup is working fine.
- (Optional) On each node, create a boot environment (BE), without the cluster software, as a pre-cluster backup BE, for example:
Configuring the Oracle Solaris Cluster Publisher
There are two main ways to access the Oracle Solaris Cluster package repository, depending on whether the cluster nodes have direct access (or access through a Web proxy) to the Internet:
Using a Repository Hosted on pkg.oracle.com
To access either the Oracle Cluster Solaris Release or Support repositories, obtain the SSL public and private keys, as follows:
- Go to http://pkg-register.oracle.com/register/repos/ (login required).
- Choose the Oracle Solaris Cluster Release or Support repository.
- Accept the license.
- Request a new certificate by choosing the Oracle Solaris Cluster software and submitting a request. (A certification page is displayed with download buttons for the key and certificate.)
- Download the key and certificate and install them, as described in the certification page.
- Configure the
ha-cluster
publisher with the downloaded SSL keys to point to the selected repository URL on pkg.oracle.com. The following example uses the release repository:
# pkg set-publisher \ -k /var/pkg/ssl/Oracle_Solaris_Cluster_4.0.key.pem \ -c /var/pkg/ssl/Oracle_Solaris_Cluster_4.0.certificate.pem \ -g https://pkg.oracle.com/ha-cluster/release/ ha-cluster
Using a Local Copy of the Repository
To access a local copy of the Oracle Solaris Cluster Release or Support repository, download the repository image, as follows.
# lofiadm -a /tmp/osc4.0-repo-full.iso
/dev/lofi/1
# mount -F hsfs /dev/lofi/1 /mnt
# rsync -aP /mnt/repo /export
# share /export/repo
-
1. Download the repository image from one of the following sites:
- Oracle Technology Network
- Oracle Software Delivery Cloud (login required)
-
2. On the Media Pack Search page, select Oracle Solaris as the Product Pack and click Go.
-
3. Choose Oracle Solaris Cluster 4.0 Media Pack and download the file.
-
4. Mount the repository image and copy the data to a shared file system that all the cluster nodes can access.
-
5. Configure the
ha-cluster
publisher. The following example uses node 1 as the system that shared the local copy of the repository: -
# pkg set-publisher -g file:///net/phys-schost-1/export/repo ha-cluster
Installing the Oracle Solaris Cluster Software Packages
# pkg publisher
PUBLISHER TYPE STATUS URI
solaris origin online
ha-cluster origin online
Listing 4. Installing the Package Group
# pkg install ha-cluster-full
Packages to install: 68
Create boot environment: No
Create backup boot environment: Yes
Services to change: 1
DOWNLOAD PKGS FILES XFER (MB)
Completed 68/68 6456/6456 48.5/48.5$<3>
PHASE ACTIONS
Install Phase 8928/8928
PHASE ITEMS
Package State Update Phase 68/68
Image State Update Phase 2/2
Loading smf(5) service descriptions: 9/9
Loading smf(5) service descriptions: 57/57
Configuring the Oracle Solaris Cluster Software
Listing 12. Verifying that Both Nodes Joined the Cluster
# cluster status
=== Cluster Nodes ===
--- Node Status ---
Node Name Status
--------- ------
phys-schost-1 Online
phys-schost-2 Online
=== Cluster Transport Paths ===
Endpoint1 Endpoint2 Status
--------- -------- ------
phys-schost-1:net3 phys-schost-2:net3 Path online
phys-schost-1:net1 phys-schost-2:net1 Path online
=== Cluster Quorum ===
--- Quorum Votes Summary from (latest node reconfiguration) ---
Needed Present Possible
------ ------- --------
2 3 3
--- Quorum Votes by Node (current status) ---
Node Name Present Possible Status
--------- ------- -------- ------
phys-schost-1 1 1 Online
phys-schost-2 1 1 Online
--- Quorum Votes by Device (current status) ---
Device Name Present Possible Status
----------- ------- -------- ------
d1 1 1 Online
=== Cluster Device Groups ===
--- Device Group Status ---
Device Group Name Primary Secondary Status
----------------- ------- --------- ------
--- Spare, Inactive, and In Transition Nodes ---
Device Group Name Spare Nodes Inactive Nodes In Transition Nodes
----------------- ----------- -------------- --------------------
--- Multi-owner Device Group Status ---
Device Group Name Node Name Status
----------------- --------- ------
=== Cluster Resource Groups ===
Group Name Node Name Suspended State
---------- --------- --------- -----
=== Cluster Resources ===
Resource Name Node Name State Status Message
------------- --------- ----- --------------
=== Cluster DID Devices ===
Device Instance Node Status
--------------- ---- ------
/dev/did/rdsk/d1 phys-schost-1 Ok
phys-schost-2 Ok
/dev/did/rdsk/d2 phys-schost-1 Ok
phys-schost-2 Ok
/dev/did/rdsk/d3 phys-schost-1 Ok
/dev/did/rdsk/d4 phys-schost-1 Ok
/dev/did/rdsk/d5 phys-schost-2 Ok
/dev/did/rdsk/d6 phys-schost-2 Ok
=== Zone Clusters ===
--- Zone Cluster Status ---
Name Node Name Zone HostName Status Zone Status
---- --------- ------------- ------ -----------
Verification (Optional)
Now, we will create a failover resource group with a LogicalHostname
resource for a highly available network resource and an HAStoragePlus
resource for a highly available ZFS file system on a zpool resource.
Listing 14. Switching the Resource Group to Node 2
# /usr/cluster/bin/clrg switch -n phys-schost-2 test-rg
# /usr/cluster/bin/clrg status
=== Cluster Resource Groups ===
Group Name Node Name Suspended Status
---------- --------- --------- ------
test-rg phys-schost-1 No Offline
phys-schost-2 No Online
# /usr/cluster/bin/clrs status
=== Cluster Resources ===
Resource Name Node Name State Status Message
------------- --------- ----- --------------
hasp-res phys-schost-1 Offline Offline
phys-schost-2 Online Online
schost-lhres phys-schost-1 Offline Offline - LogicalHostname offline.
phys-schost-2 Online Online - LogicalHostname online.
Summary
This article described how to install and configure a two-node cluster with Oracle Solaris Cluster 4.0 on Oracle Solaris 11. It also explained how to verify that the cluster is behaving correctly by creating and running two resources on one node and then switching over those resources to the secondary node.
For More Information
- On each node, ensure the correct Oracle Solaris package repositories are published. If they are not, unset the incorrect publishers and set the correct ones. The installation of the
ha-cluster packages
is likely to fail if it cannot access the Oracle Solaris publisher. - On each cluster node, install the ha-cluster-full package group, as shown in Listing 4.
On node 1, run this command.
# dladm show-phys LINK MEDIA STATE SPEED DUPLEX DEVICE net3 Ethernet unknown 0 unknown e1000g1 net0 Ethernet up 1000 full nge0 net4 Ethernet unknown 0 unknown e1000g2 net2 Ethernet unknown 0 unknown e1000g0 net1 Ethernet unknown 0 unknown nge1 net5 Ethernet unknown 0 unknown e1000g3
On node 2, run this command.
# dladm show-phys LINK MEDIA STATE SPEED DUPLEX DEVICE net3 Ethernet unknown 0 unknown e1000g1 net0 Ethernet up 1000 full nge0 net4 Ethernet unknown 0 unknown e1000g2 net2 Ethernet unknown 0 unknown e1000g0 net1 Ethernet unknown 0 unknown nge1 net5 Ethernet unknown 0 unknown e1000g3
In our example, we will be using
net1
andnet3
on each node as private interconnects.# svcprop network/rpc/bind:default | grep local_only config/local_only boolean false If it is not set to false, set it as follows: # svccfg svc:> select network/rpc/bind svc:/network/rpc/bind> setprop config/local_only=false svc:/network/rpc/bind> quit # svcadm refresh network/rpc/bind:default # svcprop network/rpc/bind:default | grep local_only config/local_only boolean false
In the example shown in Listing 5, the command is run on the second node,
phys-schost-2.
Listing 5. Running the
scinstall
Command# /usr/cluster/bin/scinstall *** Main Menu *** Please select from one of the following (*) options: * 1) Create a new cluster or add a cluster node * 2) Print release information for this cluster node * ?) Help with menu options * q) Quit Option: 1
Listing 6. Creating a New Cluster
*** Create a New Cluster *** This option creates and configures a new cluster. Press Control-D at any time to return to the Main Menu. Do you want to continue (yes/no) [yes]? Checking the value of property "local_only" of service svc:/network/rpc/bind ... Property "local_only" of service svc:/network/rpc/bind is already correctly set to "false" on this node. Press Enter to continue:
Listing 7. Selecting the Installation Mode
>>> Typical or Custom Mode <<< This tool supports two modes of operation, Typical mode and Custom mode. For most clusters, you can use Typical mode. However, you might need to select the Custom mode option if not all of the Typical mode defaults can be applied to your cluster. For more information about the differences between Typical and Custom modes, select the Help option from the menu. Please select from one of the following options: 1) Typical 2) Custom ?) Help q) Return to the Main Menu Option [1]: 1
>>> Cluster Name <<< Each cluster has a name assigned to it. The name can be made up of any characters other than whitespace. Each cluster name should be unique within the namespace of your enterprise. What is the name of the cluster you want to establish? phys-schost
Listing 8. Confirming the List of Nodes
>>> Cluster Nodes <<< This Oracle Solaris Cluster release supports a total of up to 16 nodes. List the names of the other nodes planned for the initial cluster configuration. List one node name per line. When finished, type Control-D: Node name (Control-D to finish): phys-schost-1 Node name (Control-D to finish): ^D This is the complete list of nodes: phys-schost-2 phys-schost-1 Is it correct (yes/no) [yes]?
Listing 9. Selecting the Transport Adapters
>>> Cluster Transport Adapters and Cables <<< You must identify the cluster transport adapters which attach this node to the private cluster interconnect. Select the first cluster transport adapter: 1) net1 2) net2 3) net3 4) net4 5) net5 6) Other Option: 1 Searching for any unexpected network traffic on "net1" ... done Unexpected network traffic was seen on "net1". "net1" may be cabled to a public network. Do you want to use "net1" anyway (yes/no) [no]? yes Select the second cluster transport adapter: 1) net1 2) net2 3) net3 4) net4 5) net5 6) Other Option: 3 Searching for any unexpected network traffic on "net3" ... done Unexpected network traffic was seen on "net3". "net3" may be cabled to a public network. Do you want to use "net3" anyway (yes/no) [no]? yes
Listing 10. Configuring the Quorum Device
>>> Quorum Configuration <<< Every two-node cluster requires at least one quorum device. By default, scinstall selects and configures a shared disk quorum device for you. This screen allows you to disable the automatic selection and configuration of a quorum device. You have chosen to turn on the global fencing. If your shared storage devices do not support SCSI, such as Serial Advanced Technology Attachment (SATA) disks, or if your shared disks do not support SCSI-2, you must disable this feature. If you disable automatic quorum device selection now, or if you intend to use a quorum device that is not a shared disk, you must instead use clsetup(1M) to manually configure quorum once both nodes have joined the cluster for the first time. Do you want to disable automatic quorum device selection (yes/no) [no]? Is it okay to create the new cluster (yes/no) [yes]? During the cluster creation process, cluster check is run on each of the new cluster nodes. If cluster check detects problems, you can either interrupt the process or check the log files after the cluster has been established. Interrupt cluster creation for cluster check errors (yes/no) [no]?
Listing 11 shows the final output, which indicates the configuration of the nodes and the installation log file name. The utility then reboots each node in cluster mode.
Listing 11. Details of the Node Configuration
Cluster Creation Log file - /var/cluster/logs/install/scinstall.log.3386 Configuring global device using lofi on phys-schost-1: done Starting discovery of the cluster transport configuration. The following connections were discovered: phys-schost-2:net1 switch1 phys-schost-1:net1 phys-schost-2:net3 switch2 phys-schost-1:net3 Completed discovery of the cluster transport configuration. Started cluster check on "phys-schost-2". Started cluster check on "phys-schost-1". . . . Refer to the log file for details. The name of the log file is /var/cluster/logs/install/scinstall.log.3386. Configuring "phys-schost-1" ... done Rebooting "phys-schost-1" ... Configuring "phys-schost-2" ... Rebooting "phys-schost-2" ... Log file - /var/cluster/logs/install/scinstall.log.3386
# svcs -x # svcs multi-user-server STATE STIME FMRI online 9:58:44 svc:/milestone/multi-user-server:default
- On each node of the cluster, identify the network interfaces that will be used for the private interconnects, for example:
- On both nodes, ensure that SMF services are not disabled.
# svcs -x
- On each node, ensure that the service
network/rpc/bind:default
has itslocal_only
configuration set tofalse.
- From one of the nodes, start the Oracle Solaris Cluster configuration utility by running the scinstall command, which will configure the software on the other node as well, and then type 1 from the Main menu to choose to create a new cluster or add a cluster node.
- In the Create a New Cluster screen, shown in Listing 6, answer yes and then press Enter.
- In the installation mode selection screen, select the default option (Typical), as shown in Listing 7.
- Provide the name of the cluster (in our example,
phys-schost
). - Provide the name of the other node (in our example,
phys-schost-1
), press Control-D to finish the node list, and answer yes to confirm the list of nodes, as shown in Listing 8. - The next screen configures the cluster's private interconnects, also known as the transport adapters. In our example, we are selecting interfaces net1 and net3, as determined previously. If the tool finds network traffic on those interfaces, it will ask for confirmation to use them anyway. Ensure that those interfaces are not connected to any other network, and then confirm their use as transport adapters, as shown in Listing 9.
- Next, configure the quorum device by selecting the following default answers, as shown in Listing 10:
a. Disable automatic quorum devices selection by answering no.
b.Confirm that it is okay to create the new cluster by answering yes.
c.When asked whether to interrupt cluster creation for cluster check errors, answer no. - When the
scinstall
utility finishes, the installation and configuration of the basic Oracle Solaris Cluster software is complete. The cluster is now ready for you to configure the components you will use to support highly available applications. These cluster components can include device groups, cluster file systems, highly available local file systems, and individual data services and zone clusters. To configure these components, consult the documentation library. - On each node, verify that multi-user services for the Oracle Solaris Service Management Facility (SMF) are online. Also ensure that the new services added by Oracle Solaris Cluster are all online.
- From one of the nodes, verify that both nodes have joined the cluster, as shown in Listing 12.
In the following example,
schost-lh
is used as the logical host name for the resource group. This resource is of the typeSUNW.LogicalHostname
, which is a preregistered resource type.On node 1:
# Internet host table # ::1 localhost 127.0.0.1 localhost loghost 1.2.3.4 phys-schost-1 # Cluster Node 1.2.3.5 phys-schost-2 # Cluster Node 1.2.3.6 schost-lh On node 2: # Internet host table # ::1 localhost 127.0.0.1 localhost loghost 1.2.3.4 phys-schost-1 # Cluster Node 1.2.3.5 phys-schost-2 # Cluster Node 1.2.3.6 schost-lh
# zpool create -m /zfs1 pool1 mirror /dev/did/dsk/d1s0 /dev/did/dsk/d2s0 # df -k /zfs1 Filesystem 1024-blocks Used Available Capacity Mounted on pool1 20514816 31 20514722 1% /zfs1
The zpool will now be placed in a highly available resource group as a resource of type
SUNW.HAStoragePlus.
This resource type has to be registered before it is used for the first time.Listing 13. Checking the Group and Resource Status
# /usr/cluster/bin/clrg status === Cluster Resource Groups === Group Name Node Name Suspended Status ---------- -------- --------- ------ test-rg phys-schost-1 No Online phys-schost-2 No Offline # /usr/cluster/bin/clrs status === Cluster Resources === Resource Name Node Name State Status Message ------------- --------- ----- -------------- hasp-res phys-schost-1 Online Online phys-schost-2 Offline Offline schost-lhres phys-schost-1 Online Online - LogicalHostname online. phys-schost-2 Offline Offline
From the above status, we see that the resources and the group are online on node 1.
- Identify the network address that will be used for this purpose and add it to the
/etc/inet/hosts
file on the nodes. - From one of the nodes, create a zpool with the two shared storage disks:
/dev/did/rdsk/d1s0
and/dev/did/rdsk/d2s0.
In our example, we have assigned the entire disk to slice 0 of the disks, using theformat
utility. - Create a highly available resource group to house the resources by doing the following on one node:
# /usr/cluster/bin/clrg create test-rg
- Then add the network resource to the group:
# /usr/cluster/bin/clrslh create -g test-rg -h schost-lh schost-lhres
- Register the storage resource type:
# /usr/cluster/bin/clrt register SUNW.HAStoragePlus
- Add the zpool to the group:
# /usr/cluster/bin/clrs create -g test-rg -t SUNW.HAStoragePlus -p \ zpools=pool1 hasp-res
- Bring the group online:
# /usr/cluster/bin/clrg online -eM test-rg
- Check the status of the group and the resources, as shown in Listing 13.
- To verify availability, switch the resource group to node 2 and check the status of the resources and the group, as shown in Listing 14.
- For more information on configuring Oracle Solaris Cluster components, see the resources listed in Table 2.
Table 2. Resources
Resource URL Oracle Solaris Cluster 4.0 documentation library http://www.oracle.com/pls/topic/lookup?ctx=E23623 Oracle Solaris Cluster Software Installation Guide http://www.oracle.com/pls/topic/lookup?ctx=E23623&id=CLIST Oracle Solaris Cluster Data Services Planning and Administration Guide http://www.oracle.com/pls/topic/lookup?ctx=E23623&id=CLDAG Oracle Solaris Cluster 4.0 Release Notes http://www.oracle.com/pls/topic/lookup?ctx=E23623&id=CLREL Oracle Solaris Cluster training http://www.oracle.com/solaris/technologies/cluster-overview.html Oracle Solaris Cluster downloads http://www.oracle.com/middleware/technologies/solaris-cluster-downloads.html Want technical articles like this one delivered to your inbox? Subscribe to the Systems Community Newsletter— only technical content for sysadmins and developers.