[Linux-cluster] Cluster minimum hardware requirment

[Yeheyis Workeneh]

Hello,

I have a two node cluster system sharing a SAN storage. The two nodes are
planing for failover clustering. Both cluster will be online. If one cluster
goes down, the second cluster will manage the resource. Your documentation
doesn't provide a good information. In the RHEL V4 cluster suit
documentation, you put a requirment of fence device. I don't have a plan to
use any hardware fence device. Does it cause any data integration problem
allowing both cluster running at the same time? My expctation is the cluster
will manage the resouce and shouldn't have an issue two node reading the
same storage. I don't have a plan to use GFS. The system will be used for
oracle Database.

This is what i see in your documentation on RHEL V4 cluster suit as a minum
hardware requirment

*

2.1.1. Minimum Hardware Requirements
*

A minimum hardware conguration includes only the hardware components that
are required for

cluster operation, as follows:

. At least two servers to run cluster services

. Ethernet connection for sending heartbeat pings and for client network
access

. Network Switch to connect cluster nodes and resources

*. **A fence device*

The hardware components described in Table 2-1 can be used to set up a
minimum cluster conguration.

This conguration does not guarantee data integrity under all failure
conditions, because it does

not include power switches. Note that this is a sample conguration; it is
possible to set up a minimum

conguration using other hardware.
*

Warning
*

The minimum cluster conguration is not a supported solution and should not
be used in a production

environment, as it does not guarantee data integrity under all failure
conditions.
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