Dell PowerConnect W AirWave 7.
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Contents About this Guide .......................................................................................................................................................3 Document Organization..................................................................................................................... 3 Note, Caution, and Warning Icons .................................................................................................. 3 Contacting Support ......................................
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About this Guide This preface provides an overview of this guide and contact information for Dell, and includes the following sections: “Document Organization” on page 3 “Note, Caution, and Warning Icons” on page 3 “Contacting Support” on page 4 Document Organization This document provides guidelines for purchasing new hardware which hosts the Dell PowerConnect W AirWave Wireless Management System (AWMS).
Contacting Support Table 2 Website contact Web Site 4 | About this Guide Main Website dell.com Support Website support.dell.com Documentation Website support.dell.com/manuals Dell PowerConnect W AirWave 7.
Chapter 1 Sizing Overview This overview chapter includes the following topics: “CPU and Memory Matrix” on page 5 “Storage Matrix” on page 6 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 Table 4 Storage Number of Min. AWMS Devices Storage Max.
Chapter 2 CPU, BIOS, Operating Systems, and Storage This chapter explains sizing information for the following topics: “CPU and BIOS” on page 7 “Operating System” on page 7 “Storage” on page 8 CPU and BIOS Intel Nehalem and Westmere Architecture Information With the advent of Nehalem, Intel now supports NUMA (Non Uniform Memory Access).
Storage AWMS stores most statistical data in special statistical flat files. This is a speed improvement over writing to a relational database. Additionally, it provides for a known, fixed amount of storage per managed device and consumes much less space than a traditional rational database. AMP spends much more time writing to the disk subsystem than reading from it.
Disk Partitioning AWMS automatically partitions the disk subsystem upon installation. You can override these values. Table 5 and Table 6 below list the default partitioning and provides guidance for more advanced scenarios.
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. This is set via /sys/ block//queue/scheduler. NOTE: Contact support.dell.com prior to changing this setting. 10 | CPU, BIOS, Operating Systems, and Storage Dell PowerConnect W AirWave 7.
Chapter 3 Virtualization and Scalability This chapter includes the following topics: “Virtualization” on page 11 “Scalability Assumptions” on page 12 Virtualization AWMS can run in a VMWare and Xen virtualized environment. To ensure scalability, you need to dedicate the processing and memory as described in the table below. You must also ensure that the disk subsystem can maintain the IOPS throughput as detailed below.
Scalability Assumptions Scalability is continuously tested based on the following assumptions. Deviations from these assumptions can impact overall scalability of your AWMS server.
Table 10 VisualRF Scalability Test Values (Continued) Category Value Rogue location timer (minutes) 30 Location calculation timer (min/max/number of samples) 90/360/3 Dell PowerConnect W AirWave 7.
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Appendix A Miscellaneous Sizing Information AMD Hardware Table 11 AMD Hardware Matrix Managed Devices CPU Class Clock Speed (GHz) CPUs Total Cores AWMS RAPIDS VisualRF Memory Memory Memory 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 2.6 2 12 12 GB 6 GB 6 GB NOTE: Dell does not actively conduct scalability testing for the AMD processor product line.
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