User Guide

14 Removing old measurement data 85
7signal Solutions Inc., 526 S. Main Street, Akron, Ohio 44311, USA, 855-763-9526, [e-mail],
www.7signal.com
7signal Sapphire Deployment Guide Release 5.0
APPENDIX B. BANDWIDTH REQUIREMENTS
NOTE: the volume estimates are estimates and vary based on the configuration.
14.1.1 Eye – Sonar
From
To
Medium
Traffic
motivator
Volume estimate
Major factor
Eye
Sonar
WLAN
Automated test
engine and
interactive
testing by
users.
Low, each
request is a few
hundred bytes.
Eye acts as one
WLAN end-user
would do, one
operation per
minute.
The test profile that the Eye is
running.
In case of MOS test VoFi traffic
is transmitted as long as
requested in the test
parameters, constant traffic at
the rate of 100 kBs/s.
Sonar
Eye
WLAN
Responses to
client.
Typically pseudo-
data that varies
based on the test
parameters.
MOS test most probably contain
significant amount of data.
For example, the FTP download test transfers by default 2 megabytes of data that does not take long. The
amount of data is exceptionally high for data transfer in a logistics environment but on the other hand in
office environment transfer of this size is relatively low. The test parameter should be adjusted, either to
simulate typical transfer or to save the bandwidth while keeping the transfer size high enough to give
measurements out of the network.
14.1.2 Eye – Carat
From
To
Medium
Traffic
motivator
Volume estimate
Major factor
Carat
Eye
Ethernet
Automated test
engine and
interactive
testing by
users.
1 kB/minute. The
binary protocol
for requests is
volume-efficient.
The chosen test profile and
individual test parameters dictate
whether the Eye keeps testing a
long time or is there frequent test
management traffic.
Duration of one test varies from
a few seconds to almost minutes
per request depending on the
test type.
Eye
Carat
Ethernet
Responses to
client.
100 kB /minute.
Spectrum Analysis and MOS test
most probably contain significant
amount of data.
The data transferred in only test parameters and in most cases results of analysis, sometimes raw
measurements.
Naturally the number of Eyes is directionally proportional the traffic load as each Eye connection are
independent and concurrent. One single Eye typically executes a test in one minute in the average.
However, there are tests that finish in 10 seconds (practical minimum) and few tests run few minutes.
The communication protocol is both minimal and binary so the traffic from Carat to Eye is very economic.
The measurement result minimum is around 100 bytes in one message and the top range is the spectrum
measurement (not available in all configurations) that returns approximately 300 times a 50 byte result
unit.
In data communications sense the traffic for single Eye is minimal.