Dell PowerConnect W-AirWave 7.3 User Manual download pdf (Page 13)

Dell PowerConnect W-AirWave | Server Sizing Guide Virtualization and Scalability | 13

Chapter 3

Virtualization and Scalability

This chapter includes the following topics:

 “Virtualization” on page13

 “Scalability Assumptions” on page13

Virtualization

Dell PowerConnect W-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 using the specifications outlined in Table 3, the hardware

for virtualization should exceed these specifications by 20%.

Scalability Assumptions

Using the specs outlined in Table 3, scalability tests are based on the following assumptions. Deviations from

these assumptions can impact overall scalability of your AirWave server.

NOTE: A 20% increase buffer is recommended for virtualized environments. Ensure you allocate enough extra disk space for the

OS and swap when partitioning the virtual disk.

Table 6 Wireless Scalability Test Values

Category Value

Average density of client devices per access point 5

Device configuration auditing interval Daily

Up/Down status polling period (minutes) 5

User data polling period (minutes) 10

Thin AP discovery period (minutes) 15

Device-to-device link polling period (minutes) 20

Device bandwidth polling period (minutes) 10

802.11 counters polling period (minutes) 15

Rogue AP and device location data polling period (minutes) 30

CDP neighbor data polling period (minutes) 60

NOTE: Auditing more than once a day can have a tremendous impact on scalability.

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Dell PowerConnect W-AirWave 7.3 User Manual Page 13