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Eighteen-Node Cluster With Netra CT 820 ServerFollowing is an example of a hardware configuration for an 18-node cluster:
Considerations for Choosing a Hardware ConfigurationThe Foundation Services run on a range of Netra servers that have different characteristics. The following sections describe some of the implications of choosing one type of Netra server over another type of Netra server as your cluster hardware. Types of DisksFoundation Services support SCSI, FC-AL, and IDE disks. SCSI DisksNetra T1, Netra 120, and Netra 240 servers contain SCSI disks. The CP2140 boards also contain SCSI disks. CP2300 cards can be used with SunStorEdge 3310 disk arrays. FC-AL DisksNetra 20 servers contain FC-AL disks. To use FC-AL disks, you must install the volume management feature of the Solaris operating system for all partitions managed by Sun StorEdge Network Data Replicator (SNDR). The disk scanning mechanism of these FC-AL disks does not guarantee that the slot positions of the disks provide unique, reproducible unit numbers when the disks are plugged on FC-AL. To remove this constraint, you must create a disk partition on each master-eligible node to store the volume management metadevice database. For details on how to install and configure the volume management feature for FC-AL disks while using the nhinstall tool, see the Netra High Availability Suite Foundation Services 2.1 6/03 Custom Installation Guide and the cluster_definition.conf(4) man page. IDE DisksThe CP2300 boards can accept optional IDE disks. For information about configuring the Foundation Services for IDE disks, see the Netra High Availability Suite Foundation Services 2.1 6/03 Custom Installation Guide. Types of Hardware WatchdogsThere are two types of hardware watchdogs for use with Netra servers and boards:
The following table lists the type of watchdog that is available on each type of Netra server and board. Table 2-1 Types of Hardware Watchdogs
Use the Foundation Services Watchdog Timer to monitor the LOMlite 2 hardware watchdogs on the Netra T1, Netra 20, Netra 120, and Netra 240 servers only. | ||||||||||||||||
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