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Dell PowerVault DX6112 Dell DX Object Storage Platform User's Guide - Page 9

Redundant DX Cluster Services Nodes, Cluster Services Node, CSN Installation and Configuration Guide

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Figure 1. Local Cluster Configuration Redundant DX Cluster Services Nodes The Dell DX Storage Cluster supports redundant DX Cluster Services Nodes. In a redundant model, the active DX Cluster Services Node is configured as the primary node and the redundant node is configured as the secondary node. The primary Cluster Services Node contains the cluster configuration files, active networking utilities, and active content router services. A manual failover process is required if the primary DX Cluster Services Node fails to promote the secondary DX Cluster Services Node. For more information, see the "Failover" section of the Cluster Services Node (CSN) Installation and Configuration Guide at dell.com/support/manuals. Since there is a combined virtual IP address for the primary DX Cluster Services Node, a failover to a redundant DX Cluster Services Node is transparent to all applications. When a failover is transparent, an IP address change is not required. However, the application services remain unavailable until the manual failover of the Cluster Services Node is complete. NOTE: After a secondary CSN has been promoted to active (primary), it remains as the primary, and the original primary CSN must be configured as the secondary. For more information, see the Cluster Services Installation and Configuration Guide at dell.com/support/manuals. 9

Section	Page
Dell DX Object Storage Platform User’s Guide	3
Introduction	5
DX Object Storage Platform Overview	7
Network Topologies	7
Local Cluster Configuration	8
Redundant DX Cluster Services Nodes	9
Subcluster Configuration	10
Remote Cluster Configuration	11
Application Access To DX Object Storage Platform	12
Communicating Directly With A Local Cluster	12
Communicating Directly With A Remote Cluster	13
Setting Up The DX Object Storage Platform	15
Installing The Initial Cluster Or Redundant Cluster Services Node	15
Configuring The DX Object Storage Platform	15
DX Content Router Rules Configurator	16
Using The Dell DX Content Router Rules Configurator	16
Troubleshooting The Dell DX Content Router Rules Configurator (CRRC)	17
Adding Additional DX Storage Nodes	17
Installing The System In A Rack	18
Cabling The Appliance	18
Turning On The DX Storage Node	18
Enabling Capacity In DX Cluster Services Console	18
Adding Network Adapter To DX Storage Nodes	18
Adding Network Adapters To DX Cluster Services Nodes	19
Updating The Dell DX Object Storage Platform Software	21
Updating The System Software On The CSN	21
Downloading The Update Manager Payload	21
Executing Updates	21
Receiving System Software Update Notifications	22
Downgrading A Payload	22
Troubleshooting Update Failures	22
Repairing The Installed System Software	22
Validating The System Software On The CSN	23
Upgrading Or Re-installing The DX System Using The Dell Restore Manager	25
Introduction To The Dell Restore Manager	25
Restore Manager Operating Modes	25
System Recovery Mode	25
Factory Reset Mode	25
Downloading The Restore Manager Application	26
Creating A Bootable USB Disk	26
Creating A Restore Manger USB Drive On Microsoft Windows Systems	26
Creating A Restore Manger USB Drive On Linux Or Unix Systems	27
Executing The Restore Manager	27
Upgrading From DX 2.x To DX 3.1 Using Restore Manager	28
Preparing To Upgrade From DX 2.x To DX 3.1	28
Reconfiguring The CSN	29
Restoring The Backup Manifest UUID	29
Restoring The DXM Configuration	30
Restoring The DX Content Router Rules Configurator	30
Disaster Recovery	31
Recovery Solution Map	31
Recovering From Disk Failures	31
Single Disk Failure	31
Two Disk Failure	32
Detecting And Monitoring Disk Failures	32
Storage Node Hard Drive LED Behavior	32
Reinstalling The Operating System	32
Additional References	33
Software Documents	33
Hardware Documents	33
Systems Management Documents	34
Appendix A—Upgrading DX System Software From Version 1 To Version 2	35
Guidelines	35
Upgrading RHEL 5.3 To RHEL 5.5	35
Upgrading DX Software From Version 1.0 To Version 2.x	36
Appendix B—Hard Drive Hot Plug User Interface Issue	37
Getting Help	39
Contacting Dell	39

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Figure 1. Local Cluster Configuration

Redundant DX Cluster Services Nodes

The Dell DX Storage Cluster supports redundant DX Cluster Services Nodes. In a redundant model, the active DX Cluster

Services Node is configured as the primary node and the redundant node is configured as the secondary node.

The primary Cluster Services Node contains the cluster configuration files, active networking utilities, and active

content router services. A manual failover process is required if the primary DX Cluster Services Node fails to promote

the secondary DX Cluster Services Node. For more information, see the “Failover” section of the

Cluster Services Node

(CSN) Installation and Configuration Guide

dell.com/support/manuals

. Since there is a combined virtual IP address for

the primary DX Cluster Services Node, a failover to a redundant DX Cluster Services Node is transparent to all

applications. When a failover is transparent, an IP address change is not required. However, the application services

remain unavailable until the manual failover of the Cluster Services Node is complete.

NOTE:

After a secondary CSN has been promoted to active (primary), it remains as the primary, and the original

primary CSN must be configured as the secondary.

For more information, see the

Cluster Services Installation and Configuration Guide

dell.com/support/manuals