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B2BITS® Cluster Solution (CentOS Linux)

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November 13, 2008

Hardware and Software Technologies

Cluster solution implements the following hardware and software technologies:

Clustering technology based on the RHCS software in the CentOS 5 Enterprise Linux Server

operating system.

PERC 4/DC card or PERC 4e/DC card.

Storage management software.

Clustering Technology

Clustering is the technology that allows connecting multiple servers together to achieve higher

availability and performance. RHCS is a software component in CentOS 5 Enterprise Linux Server,

which provides failover support for applications and services running on each node.

Cluster Components

Two Dell 1850 PowerEdge systems in a homogeneous pair.

One PowerVault 220S storage system with dual EMMs and split-bus module.

Supported network adapters for a public and private LANs.

Support for RAID 1, 5, 1+0, and 5+0 levels and hot spare drives. RAID 5 is recommended

level.

NOTE: RAID 0 and independent drives are possible but are not recommended for a high-availability

system because they do not offer data redundancy if a disk failure occurs.

Two PERC 4e/DC adapters for the cluster‟s shared storage.

Ethernet network adapter or integrated network adapter for node-to-node cluster

communications.

Ethernet crossover or straight cable for node-to-node cluster interconnects.

Figure 1 shows configuration of the cluster solution components and their interconnections

Figure 1. Configuration of cluster solution components and their interconnections.

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