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serviceguard t2808-90006
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Disaster Scenarios and Their Handling
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serviceguard t2808-90006
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Install
Configuring your Environment
Two Data Center Setup
#RAIDTAB= # MD RAID Commands
Recovery Process
Alternative Power Sources
Using Persistent Device Names
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Disaster Scenarios and Their Handling
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Chapter 4
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Contents
Page
Legal Notices
Contents
Disaster Scenarios and Their Handling Managing an MD Device
Contents
Contents
Printing History
Editions and Releases
HP Printing Division
Intended Audience
Document Organization
Page
Related
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Disaster Tolerance
Evaluating the Need for Disaster Tolerance
Evaluating the Need for Disaster Tolerance
What is a Disaster Tolerant Architecture?
High Availability Architecture
Node 1 fails
Pkg B Client Connections
Disaster Tolerant Architecture
Understanding Types of Disaster Tolerant Clusters
Extended Distance Clusters
From both storage devices
Extended Distance Cluster
Two Data Center Setup
Benefits of Extended Distance Cluster
Cluster Extension CLX Cluster
Shows a CLX for a Linux Serviceguard cluster architecture
CLX for Linux Serviceguard Cluster
Benefits of CLX
Differences Between Extended Distance Cluster and CLX
Continental Cluster
Los Angeles Cluster
New York Cluster
Data Cent er a Data Center B
Continental Cluster
Benefits of Continentalclusters
Comparison of Disaster Tolerant Solutions
Continental Cluster With Cascading Failover
Comparison of Disaster Tolerant Cluster Solutions
Attributes Extended Distance
Continentalclusters
Cluster HP-UX only
Understanding Types of Disaster Tolerant Clusters
Understanding Types of Disaster Tolerant Clusters
Understanding Types of Disaster Tolerant Clusters
WAN
EVA
Disaster Tolerant Architecture Guidelines
Protecting Nodes through Geographic Dispersion
Protecting Data through Replication
Off-line Data Replication
On-line Data Replication
Physical Data Replication
Advantages of physical replication in hardware are
Disadvantages of physical replication in hardware are
Advantages of physical replication in software are
Disadvantages of physical replication in software are
Logical Data Replication
Disadvantages of logical replication are
Using Alternative Power Sources
Ideal Data Replication
Alternative Power Sources
Power Circuit 1 node
Data Center a Node 3 Power Circuit
Creating Highly Available Networking
Disaster Tolerant Local Area Networking
Disaster Tolerant Wide Area Networking
Disaster Tolerant Cluster Limitations
Manage it in-house, or hire a service?
Managing a Disaster Tolerant Environment
How is the cluster maintained?
Additional Disaster Tolerant Solutions Information
Building an Extended Distance
Types of Data Link for Storage Networking
Dwdm
Two Data Center and Quorum Service Location Architectures
Two Data Center and Quorum Service Location Architectures
Two Data Centers and Third Location with Dwdm and Quorum
Server
Two Data Center and Quorum Service Location Architectures
Rules for Separate Network and Data Links
Guidelines on Dwdm Links for Network and Data
Guidelines on Dwdm Links for Network and Data
Guidelines on Dwdm Links for Network and Data Chapter
Configuring your Environment
Understanding Software RAID
Installing the Extended Distance Cluster Software
Installing XDC
Supported Operating Systems
Prerequisites
Verifying the XDC Installation
# rpm -Uvh xdc-A.01.00-0.rhel4.noarch.rpm
Installing the Extended Distance Cluster Software
Configuring the Environment
Configuring the Environment
Configuring the Environment
Configuring Multiple Paths to Storage
Setting the Value of the Link Down Timeout Parameter
Cluster Reformation Time and Timeout Values
Using Persistent Device Names
Http//docs.hp.com
Creating a Multiple Disk Device
To Create and Assemble an MD Device
# mdadm -A -R /dev/md0 /dev/hpdev/sde1 /dev/hpdev/sdf1
Chapter
Linux
#RAIDTAB= # MD RAID Commands
Creating and Editing the Package Control Scripts
To Create a Package Control Script
To Edit the Datarep Variable
To Edit the Xdcconfig File parameter
To Configure the RAID Monitoring Service
Editing the raid.conf File
Cases to Consider when Setting Rpotarget
RPO Target Definitions
Chapter
Multipledevices and Componentdevices
Raidmonitorinterval
Configuring your Environment for Software RAID
What happens when this disaster occurs
Recovery Process
Disaster Scenario
Disaster Scenarios and Their Handling
Disaster Scenarios and Their Handling
# mdadm --remove /dev/md0
# mdadm -add /dev/md0
Dev/hpdev/mylink-sdf
P1 uses a mirror md0 Run the following command to
S2 is non-current by less
# cmrunpkg packagename
Execute the commands that With md0 consisting of only
N1, for example Becomes accessible from N2
Center
Disaster Scenarios and Their Handling
Managing an MD Device
Viewing the Status of the MD Device
Cat /proc/mdstat
Stopping the MD Device
Example A-1 Stopping the MD Device /dev/md0
Starting the MD Device
Example A-2 Starting the MD Device /dev/md0
Removing and Adding an MD Mirror Component Disk
# udevinfo -q symlink -n sdc1
Adding a Mirror Component Device
# mdadm --remove /dev/md0 /dev/hpdev/sde
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