Server Sizing Guide Dell Networking W-AirWave 8.
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Contents Identifying Hardware Requirements 5 Tested Hardware Platforms Testing Environment Parameters Test Values Conditions that Impact Hardware Sizing Choosing Your RAID Controller RAID Configuration Information Choosing Your Hard Drives SSDs vs 15K SAS 5 5 6 7 9 9 9 9 Configuring Your Hardware CPU Configuration Disk Partitioning Filesystem Configuration Virtualization Virtualization Sizing a Master Console and Failover Server Master Console Failover Server Contacting Dell Dell Networking W-AirWav
| Contents Dell Networking W-AirWave 8.
Chapter 1 Identifying Hardware Requirements This document provides general guidelines to follow when selecting and configuring hardware. The first part of this chapter describes two AirWave appliances, and the networking environment in which those appliances were tested and validated. The following sections lists network conditions and AirWave settings that can cause your server sizing needs to differ from the tested values, and how those settings might impact your choice of hardware.
l RAID Level: RAID 1 and 10 l Stripe size: 1024 KiB l Number of drives: 8 l Reads %: 20% l Read cache hit ratio: 95% l Write cache hit ratio: 65% l Average I/O size : 8 KiB Test Values Scalability is tested based on the following test values. Deviations from these values can impact overall scalability of your AirWave server.
Table 3: VisualRF Scalability Test Values (Continued) Category Number of access points per floor plan 20 Number of clients per floor plan 100 Number of attenuation grid cells per floor plan 2,500 Number Rogue devices per floor plan 20 AirWave Synchronization timer (minutes) 15 Rogue location timer (minutes) 30 Location calculation timer (min/max/number of samples) 90/360/3 Conditions that Impact Hardware Sizing Accurate hardware sizing is almost as much of an art as it is a science, as it requ
AppRF can produce a lot of data and increase the AirWave’s storage requirements, but an upper bound can be configured to mitigate that problem. l SNMP Poll Periods: The AW-HW-ENT appliance is certified with default polling periods (i.e., 10 minutes for interface polling, 5 minutes for up/down polling). More aggressive or frequent AirWave polling needs a server with increased CPU and IOPS capacity to handle the increased workload. l RAPIDS.
Choosing Your RAID Controller RAID 10 is the only supported RAID configuration for AirWave. Software RAID and SATA drives are NOT SUPPORTED for any configuration of AirWave. RAID Configuration Information For RAID 10: l Use a dedicated Hardware RAID controller with caching and battery backup or a non volatile (NV) cache. l Configure the RAID controller for Write-Back caching with battery backup (unless NVcache is selected, in which case Force Write-Back without Battery backup is recommended).
Chapter 2 Configuring Your Hardware This section explains sizing information for CPUs, Disk partitions, and file systems, and it includes the following sections: l "CPU Configuration " on page 10 l "Disk Partitioning" on page 10 l "Filesystem Configuration" on page 10 CPU Configuration Ensure that Power Management is configured for Maximum Performance. By default, most vendors configure BIOS to an eco-friendly setting. Ensure that Memory Operating Mode is configured to Optimizer Mode, if available.
Chapter 3 Virtualization Virtualization AirWave can run in a virtualized environment. To ensure scalability, use a dedicated processor and memory. You must also ensure that the disk subsystem can maintain the IOPS throughput described in "Tested Hardware Platforms" on page 5. Most virtualized environments use a shared disk subsystem assuming that each application will have bursts of I/O without a sustained high I/O throughput. AirWave requires a continuous sustained high data I/O rate.
Appendix A Sizing a Master Console and Failover Server Master Console Table 5: Master Console Specifications Environment Size CPU Class Clock Speed (GHz) CPUs Total Cores Memory Disk Subsystem Small (2-3 servers) Intel Xeon E5-2640 2.5 1 6 48GB 6x 146GB 15k RAID 10 (438GB usable disk space) Large (>3 servers) Dual Intel Xeon E52640 2.
Contacting Dell Table 6: Contact Information Web Site Support Main Website dell.com Support Website dell.com/support Contact Information dell.com/contactdell Documentation Website dell.com/support/manuals 13 | Sizing a Master Console and Failover Server Dell Networking W-AirWave 8.
