MetroCluster is a set of scripts that work in an MC/ServiceGuard
cluster to automate failover to alternate nodes in the case of disaster
in a campus or metropolitan cluster. The MetroCluster/SRDF template contains
the following files, installed in /opt/cmcluster/toolkit/SGSRDF:
Table 4-1 MetroCluster/SRDF Template Files
| Name | Description |
|---|
| srdfpkg.cntl | The MetroCluster/SRDF control script template.
This template must be customized for the specific EMC Symmetrix
and HP 9000 host system configuration. Copies of this template must
be customized for each separate MC/ServiceGuard package. |
| Samples | A directory containing sample convenience shell
scripts that must be edited before using. These shell scripts may
help to automate some configuration tasks. These scripts are contributed,
and not supported. This directory also contains sample Raid Manager configuration
files and other examples. |
MetroCluster/SRDF has to be installed on all nodes that will
run a ServiceGuard package that accesses data on an EMC Symmetrix
where the data are replicated to a second Symmetrix using the SRDF
facility. In the event of node failure, the integration of MetroCluster/SRDF
with the package will allow the application to fail over in the
following ways:
among local host systems that are
attached to the same EMC Symmetrix.
between one system that is attached locally to its
EMC Symmetrix and another "remote" host that is
attached locally to the other EMC Symmetrix.
MetroCluster with EMC SRDF is specifically for configuring
one or more MC/ServiceGuard packages whose data reside on EMC Symmetrix ICDAs
(Integrated Cache Disk Arrays) replicated with SRDF (Symmetrix Remote
Data Facility).
MetroCluster with EMC SRDF can be used in a campus or metropolitan cluster
configuration with nodes in a loop of up to 100 km. Symmetrix configurations
can be either 1 by 1 (one Symmetrix at each data center) or M by
N (one or two Symmetrix frames at each data center).
Configuration of MetroCluster/SRDF must be done on all the
cluster nodes, as is done for any other MC/ServiceGuard package.
To use MetroCluster/SRDF, Symmetrix host-based software for control
and status of the EMC Symmetrix disk arrays must also be installed
and configured on each HP 9000 host system that might execute the application
package.
Printable version
