Forum Discussion
Azim_IIPL
Cirrus
CirrusF5 BIG-IP Sizing Requirement
Hi Expert There is ongoing requirement for putting all internet facing applications behind web application firewall, and WAF TPS consume F5 CPU and memory and other parameters as well. Fear is that...
for raw estimation:
(your_targeted_tps at 5th year / 80% ) x 4 = required F5 datasheet tps5th year: because usually company's asset depreciation is calculated for 5 years.
80% ==> so you have 20% buffer
x 4 ==> because usually f5 datasheet spec is cut by 75% for heavy processing (WAF, complex irules, etc.)
zamroni777
Nacreous
Nacreousfor raw estimation:
(your_targeted_tps at 5th year / 80% ) x 4 = required F5 datasheet tps
5th year: because usually company's asset depreciation is calculated for 5 years.
80% ==> so you have 20% buffer
x 4 ==> because usually f5 datasheet spec is cut by 75% for heavy processing (WAF, complex irules, etc.)
Azim_IIPLCirrus
Cirrus@zamroni i am not sure fully throughup could you please a few comments again in simple way.
Thank you
The following is brief your comments
- Your Targeted TPS at 5th Year: This is the level of transactions per second (TPS) you aim to achieve after five years of operation.
/80%/80%: We include an 80% factor to provide a buffer or safety margin. This accounts for any unforeseen challenges or fluctuations, ensuring a more reliable estimate.
×4×4: To accommodate heavy processing tasks like Web Application Firewall (WAF), complex iRules, and other demanding operations, we multiply by 4. This factor assumes that the F5 datasheet specifications are typically reduced by 75% to ensure realistic performance under heavy workloads.
In simpler terms, the formula helps estimate the required Transaction Per Second (TPS) capacity of an F5 device by considering your projected TPS at the 5th year, providing a safety buffer of 20%, and adjusting for the heavy processing demands by multiplying by 4. This ensures that the F5 device can handle the expected workload even under challenging conditions and future growth.
- zamroni777
from you reply, i guess you understood my raw formula.
surely, the TPS is maximum TPS.
adjust the asset depreciation year duration and fluctuation buffer accordingly.- Azim_IIPL
Thank you for your help!