IBM System p5 510Q Express server stands up strong

Short Description
The IBM System p5 510Q Express is the company’s newest entry-level p-system series server. But don’t let the entry-level tag turn you off, because this server — which runs IBM’s Unix based AIX or a variety of Linux operating systems — is an impressive bundle of performance and manageability.

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The server we tested was loaded with four 64-bit 1.5GHz IBM Power5+ processors, 8GB of RAM and three 150GB hard drives. The motherboard had two copper 1Gbps Ethernet ports. There were two hot-swappable, load-balancing, redundant power supplies.
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But AIX was more stable with its performance over time, as the Red Hat performance numbers showed a higher variability and sometimes a declining trend. With all the differences between the software components making up the two operating systems, it is difficult to determine the cause for the difference.
Our network interface card (NIC) and network stack tests show similar impressive performance results. The NICs can support more than 96% of full line rate, which is as good as we have seen with this test. The TCP stack test shows that the IBM System p5 510Q Express can create and tear down more than 5,000 connections per second. Similar to the CPU tests, the TCP stack tests showed AIX performing slightly lower than Linux, but with less variance.
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