Chapter 3 Virtualization And Scalability; Virtualization; Scalability Assumptions - Dell PowerConnect W-Airwave Manual

This chapter includes the following topics:
"Virtualization" on page 9

"Scalability Assumptions" on page 9


Virtualization

AirWave can run in a VMware and Xen virtualized environment. To ensure scalability, dedicate the processing
and memory. You must also ensure that the disk subsystem can maintain the IOPS throughput as detailed below.
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.
For virtualized environment, use dedicated hardware. If you are using the specifications outlined in
hardware for virtualization should exceed these specifications by 20%.
NOTE: Dell recommends a 20% increase buffer for virtualized environments. Ensure you allocate enough extra disk space for the
OS and swap when partitioning the virtual disk.

Scalability Assumptions

Using the specifications outlined in
Deviations from these assumptions can impact overall scalability of your AirWave server.
Table 5
Wireless Scalability Test Values
Category
Average density of client devices per access point
Device configuration auditing interval
Up/Down status polling period (minutes)
User data polling period (minutes)
Thin AP discovery period (minutes)
Device-to-device link polling period (minutes)
Device bandwidth polling period (minutes)
802.11 counters polling period (minutes)
Rogue AP and device location data polling period (minutes)
CDP neighbor data polling period (minutes)
NOTE: Auditing more than once a day can have a tremendous impact on scalability.
Dell PowerConnect W-AirWave 7.5 | Server Sizing Guide
Chapter 3
Virtualization and Scalability
Table 2, Dell continually tests scalability based on the following assumptions.
Value
5
Daily
5
10
15
20
10
15
30
60
Virtualization and Scalability | 9
Table 2, the