Cluster Hardware - Red Hat CLUSTER SUITE - CONFIGURING AND MANAGING A CLUSTER 2006 Manual

Chapter 2. Hardware Installation and Operating System Configuration
Network power switches to enable each node to power-cycle the other nodes during the
•
failover process
Ethernet interfaces configured to use channel bonding
•
At least two UPS systems for a highly-available source of power
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The components described in Table 2-3 can be used to set up a no single point of failure
cluster configuration that includes two single-initiator SCSI buses and power switches to
ensure data integrity under all failure conditions. Note that this is a sample configuration;
it is possible to set up a no single point of failure configuration using other hardware.
Hardware
Two servers (up to 16
supported)
One network switch
Three network cables (each
node)
Two RJ45 to DB9 crossover
cables
Two power switches
FlashDisk RAID Disk
Array with dual controllers
Two HD68 SCSI cables
Two terminators
Redundant UPS Systems
Table 2-3. Example of a No Single Point of Failure Configuration
Cluster hardware configurations can also include other optional hardware components that
are common in a computing environment. For example, a cluster can include a network
Description
Each node includes the following hardware:
Two network interfaces for:
Client network access
Fence device connection
A network switch enables the connection of multiple
nodes to a network.
Two cables to connect each node to the redundant network
switches and a cable to connect to the fence device.
RJ45 to DB9 crossover cables connect a serial port on
each node to the Cyclades terminal server.
Power switches enable each node to power-cycle the other
node before restarting its services. Two RJ45 Ethernet
cables for a node are connected to each switch.
Dual RAID controllers protect against disk and controller
failure. The RAID controllers provide simultaneous
access to all the logical units on the host ports.
HD68 cables connect each host bus adapter to a RAID
enclosure "in" port, creating two single-initiator SCSI
buses.
Terminators connected to each "out" port on the RAID
enclosure terminate both single-initiator SCSI buses.
UPS systems provide a highly-available source of power.
The power cables for the power switches and the RAID
enclosure are connected to two UPS systems.
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