Dell PowerConnect W AirWave 7.
Contents Overview ................................................................................................................................................................................... 4 High Level Sizing Information ................................................................................................................................................... 4 Storage Matrix.....................................................................................................................
Overview This document provides guidelines for purchasing new hardware which will host the Dell PowerConnect W AirWave Wireless Management System (AWMS). Your hardware should incorporate margin for WLAN expansion as well as future AWMS features and modules. These specifications are formulated to keep AWMS running on the same hardware platform for up to two years.
Storage Matrix # of Devices Min. AWMS Storage 100 *75 GB Max.
Operating System To ensure hardware capability purchase server hardware that is certified to by Red Hat Enterprise Linux. AWMS includes the CentOS operating system based on Red Hat Enterprise Linux and is installed by default. You may choose to use Red Hat Enterprise Linux. AWMS supports both 32-bit and 64-bit hardware platforms. An AWMS server servicing more than 2,500 devices requires 64-bit OS installation coupled with AWMS 7.1 or higher. AWMS 7.1 installs 64-bit CentOS by default.
The second partition will required 2 SAS/SCSI drives in a RAID-1 configuration supplied via a hardware controller. Both drives must have 15K RPM spindle speeds. This partition will contain the operating system. Note: Please contact http://support.dell.com when purchasing or configuring any hardware platform servicing more than 2,500 devices. AWMS servers servicing more than 2,500 devices require 64-bit OS and AWMS 7.1 or higher. Do not use software raid systems or SATA disk drives.
CentOS and RH Linux include four custom schedulers to handle I/O. CFQ - Completely Fair Queuing is the default algorithm Deadline elevator - uses a deadline algorithm to minimize I/O latency NOOP scheduler – is a simple FIFO Anticipatory elevator – introduces a small delay before dispatching the I/O While CFQ works well in most installations, Dell has found changing scheduler to NOOP and allowing the hardware RAID controller to handle I/O queuing has produce significant I/O improvements.
Scalability Assumptions Dell continually test scalability based on the following assumptions. Deviations from these assumptions can impact overall scalability of your AWMS server.
Number of clients per floor plan 100 Number of attenuation grid cells per floor plan 2,500 Number Rogue devices per floor plan 20 AMP Synchronization timer (minutes) 15 Rogue location timer (minutes) 30 Location calculation timer (min/max/number of samples) 90/360/3
Appendix AWMS Appliance Dell provides the option of purchasing a specially designed hardware appliance. There are two models listed below. AWMS-HW-PRO is designed for deployments with up to 1,000 devices. AWMS-HWENT is designed for deployments up to 2,500 devices. SKU CPU Class Clock CPUs Speed Total Memory Disk Subsystem 12 GB (4) 73GB, 15K RPM - Raid 10 Cores (GHz) AWMS-HW-PRO AWMS-HW-ENT Quad Core Intel® Xeon® X5560 2.8 Quad Core Intel® Xeon® X5560 2.
Data Disk SSDSA2SH064G1 Intel 2.5” 64 GB SSD, X25-E SLC, 7.0 mm 14 RAID Controller AOC-USASLP-H8iR SAS 3Gb/s Eight-Internal ports RAID Adapter 1 AMD Hardware Matrix Managed Devices CPU Class Clock CPUs Speed Total AWMS RAPIDs VisualRF Cores Memory Memory Memory (GHz) 500 Quad Core AMD Opteron™ 8387 2.8 1 4 4 GB 2 GB 2 GB 1,000 Quad Core AMD Opteron™ 8387 2.8 2 8 10 GB 3 GB 3 GB 2,000 Quad Core AMD Opteron™ 8435 2.
