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serviceguard t2808-90006 manual
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104 pages, 561.76 Kb
HP Serviceguard Extended Distance Cluster for Linux A.01.00 Deployment Guide
Manufacturing Part Number:
T2808-90006
May 2008 Second Edition
Contents
HP Serviceguard Extended Distance Cluster for Linux A.01.00 Deployment Guide
Page
Contents
1. Disaster Tolerance and Recovery in a Serviceguard Cluster
2.Building an Extended Distance Cluster Using Serviceguard and Software
RAID
3. Configuring your Environment for Software RAID
4. Disaster Scenarios and Their Handling
A. Managing an MD Device
Page
Page
Table
Editions and Releases
NOTE
Page
Intended Audience
Document Organization
Page
Related
Publications
• http://www.hp.com/go/ha
Problem Reporting
Page
Disaster Tolerance and
Recovery in a Serviceguard
Cluster
Evaluating the Need for Disaster Tolerance
Evaluating the Need for Disaster Tolerance
Disaster tolerance
disaster
Page
What is a Disaster Tolerant Architecture
What is a Disaster Tolerant Architecture
Figure
High Availability Architecture
pkg B
Client Connections
multiple points of failure (MPOF)
data center
disaster tolerant architecture
Disaster Tolerant Architecture
Extended Distance Clusters
campus clusters
Extended Distance Cluster
Two Data Center Setup
Benefits of Extended Distance Cluster
Cluster Extension (CLX) Cluster
CLX for Linux Serviceguard Cluster
Benefits of CLX
Differences Between Extended Distance Cluster and CLX
Continental Cluster
Continental Cluster
Los Angeles Cluster:
WAN
New York Cluster:
Data Center A
Benefits of Continentalclusters
Continental Cluster With Cascading Failover
Comparison of Disaster Tolerant Solutions
Comparison of Disaster Tolerant Cluster Solutions
Attributes
Extended Distance
CLX
Continentalclusters
Comparison of Disaster Tolerant Cluster Solutions (Continued)
Page
Page
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Protecting Nodes through Geographic Dispersion
Protecting Data through Replication
On-lineData Replication
Synchronous replication
Asynchronous 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
Network
Logical Replication
in Software
No direct access to
both copies of data
Using Alternative Power Sources
Creating Highly Available Networking
Disaster Tolerant Local Area Networking
Disaster Tolerant Wide Area Networking
Disaster Tolerant Cluster Limitations
Managing a Disaster Tolerant Environment
Managing a Disaster Tolerant Environment
Page
Additional Disaster Tolerant Solutions Information
Additional Disaster Tolerant Solutions
Information
Building an Extended Distance
Cluster Using Serviceguard and
Software RAID
Types of Data Link for Storage and Networking
Types of Data Link for Storage and
Networking
Link Technologies and Distances
Type of Link
Two Data Center and Quorum Service Location Architectures
Two Data Center and Quorum Service Location Architectures
Page
Two Data Centers and Third Location with DWDM and Quorum
Server
Page
Rules for Separate Network and Data Links
Rules for Separate Network and Data Links
Guidelines on DWDM Links for Network and Data
Guidelines on DWDM Links for Network and Data
Page
Page
Configuring your Environment
for Software RAID
Understanding Software RAID
Understanding Software RAID
http://www.tldp.org/HOWTO/Software-RAID-HOWTO.html
Supported Operating Systems
Prerequisites
Installing XDC
Verifying the XDC Installation
Page
Configuring the Environment
Configuring the Environment
IMPORTANT
Page
Setting the Value of the Link Down Timeout Parameter
http://download.qlogic.com/manual/32338/SN0054614-00B.pdf
Cluster Reformation Time and Timeout Values
Heartbeat
Link Down
Intervals
Using Persistent Device Names
Using Persistent Device Names
To Create and Assemble an MD Device
#mdadm -A -R /dev/md0 /dev/hpdev/sde1 /dev/hpdev/sdf1
#mdadm -S /dev/md0
Creating Volume Groups and Configuring VG Exclusive Activation on the MD Mirror
Creating Volume Groups and Configuring VG Exclusive Activation on the MD Mirror
http://docs.hp.com/en/ha.html#Serviceguard for
Linux
Configuring the Package Control Script and
RAID Configuration File
Creating and Editing the Package Control Scripts
Editing the raid.conf File
Cases to Consider when Setting RPO_TARGET
RPO Target Definitions
Page
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Disaster Scenarios and Their
Handling
Disaster Scenarios and Their Handling
Disaster Scenarios and Their Handling (Continued)
NOTE:
Page
Page
Page
Page
Page
IMPORTANT:
Page
Page
A Managing an MD Device
Viewing the Status of the MD Device
Viewing the Status of the MD Device
cat /proc/mdstat
Stopping the MD Device
Stopping the MD Device
# mdadm -S<md_device name
Example A-1Stopping the MD Device /dev/md0
[root@dlhct1 dev]# mdadm -S /dev/md0
Starting the MD Device
Starting the MD Device
# mdadm -A -R<md_device_name
Example A-2Starting the MD Device /dev/md0
# mdadm -A -R /dev/md0 /dev/hpdev/sde /dev/hpdev/sdf1
Removing and Adding an MD Mirror Component Disk
Removing and Adding an MD Mirror
Component Disk
# udevinfo -qsymlink -nsdc1
# mdadm --remove /dev/md0 /dev/hpdev/mylink-sdc1
Adding a Mirror Component Device
Index