Dell PowerConnect W-Airwave Manual

Also see for PowerConnect W Airwave 7.1: User guide User guide Manual Quick start guide

Contents

Storage Matrix# ofDevicesMin. AWMSStorageMax. AWMSStorage*IOPS2 x random writes toreadsStorage System100 *75 GB 75 GB 60 (1) Drive 15K RPM200 75 GB 75 GB 120 (1) Drive 15K RPM500 75 GB 75 GB 300 Multiple 15K RPM RAID Drives1,000 75 GB 150 GB 600 Multiple 15K RPM RAID Drives2,500 187 GB 375 GB 1,500 Multiple 15K RPM RAID Drives2,500 + 300 GB 600 GB 3,000 Multiple 15K RPM & SSD RAID Drives* The 75 GB requirement on the smaller installation (100-500) accounts for the OS and swap overhead,plus it is very difficult to install a single disk with less 75 GB capacity.Note: Please ensure the disk subsystem can sustain these random write rates. Sustained sequential write rates willnot help, because AWMS writes are primarily random.CPU & BIOSIntel Nehalem and Westmere Architecture InformationWith the advent of Nehalem, Intel makes a giant leap in the FSB to support NUMA (Non UniformMemory Access). In NUMA, memory on the same processor board as the CPU (local memory) isaccessed faster than memory on other processor boards (shared memory), hence the "non-uniform"nomenclature. As a result, NUMA architecture scales much better to higher numbers of CPUs/coresthan SMP. 32-bit - ensure NUMA is disabled. Some vendors’ BIOS refer to non NUMA as “Memory Node Interleaving”. Ensure“Memory Node Interleaving” is “Enabled” on 32-bit operating systems. By default most vendors disable this setting in their BIOS. 64-bit - ensure NUMA is enabled. Some vendors’ BIOS have “NUMA Enabled” or “NUMA-AwareOS” options.Ensure Power Management is configured to “Maximum Performance.” By default most vendorsconfigure BIOS to an eco-friendly setting.Ensure Memory Operating Mode is configured to “Optimizer Mode” if available.AMD InformationDell does not actively conduct scalability testing for the AMD processor product line. These numbersare based on published performance data versus the Intel product line. See Appendix below for detailsin the AMD Scalability Matrix.