Members of the vendor's "ClusterLoad" family of products, the Nemasys and Pegasys appliances from ClusterScale are Load Balancer appliances designed to be deployed at the front of server farms. Both the appliances are 1U and are based on Dell Power Edge hardware; the higher end offering (Nemasys) running on the Dell PE 1950 and the lower (Pegasys) running on the Dell PE 860.

Layer 4 and Layer 7 load balancing capabilities are featured; with session persistence possible by way of source tracking, netmask, port following, or cookie-based methodologies. Among the several load-balancing algorithms supported are round robin and least connections, as well as weighted flavors of each.

The devices are driven by the customer's choice of the vendor's customized CentOS, or Red Hat Enterprise Linux 5. Performance-wise, the appliances support throughput of better than 2 Gb/sec and can handle up to 100,000 HTTP GETs a second and 200,000 concurrent L7 sessions or 7,000,000 concurrent L4 sessions. The appliances additionally provide SSL termination and can support up to 150 SSL transactions per second. The vendor states that the appliances ship with no software-based license restrictions as to the number of servers balanced.

Both appliances are driven by Intel Xeon Dual Core processors. The Pegasys includes a single, 80GB drive a single power supply, 1 GB of RAM, and dual GigE ports for connectivity; while the Nemasys boasts dual RAID-protected 80 GB drives (hot-swap supported), redundant power supplies, 2 GB of RAM, and 4 GigE ports. The devices can be deployed in active/passive HA pairs.

Other features include a Web-based interface, included reporting tools (rrdtool), SNMP support, support for SNAT, NAT and Direct Routing, and support for adaptive scheduling agents for UNIX, Linux, Mac and Windows.

Pricing for clustered pairs of the appliances is $11,995 for Pegasys and $23,995 for Nemasys.

Contact the vendor for further information.

product submission by EITPlanet Staff

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