Sensei: Hardware Requirements

Due to the nature of packet analysis and granular drill-down reporting features, Sensei require more horsepower than a standard L3-L4 firewall.


Sensei requires at least 4 GB of memory. Installer will not continue if you have less than 4 GB of RAM.


A roadmap feature - Cloud reporting - will enable you to install Sensei to devices which have limited amount of memory. E.g. you’ll be able to install Sensei to a Raspberry Pi.

CPU & Memory

Because the analytics module relies on Elastic Search to do Big Data processing, amount of the memory available in the system is crucial for the performance of the whole product.

At least dual-core (i5 or equivalent) or preferably quad-core modern CPU (i7 or equivalent) would be advisable.

Recommended minimum hardware requirements for Sensei based on the number of users and the bandwidth:

Number of Users

WAN Bandwith

Min. Memory

Min. CPU


20 Mbps

8 GB

Intel Dual-Core i3 2.0 GHz (2 Cores, 4 Threads) or equivalent


50 Mbps - 10 Kpps

8 GB

Intel Dual-Core i5 2.0 GHz (2 Cores, 4 Threads) or equivalent


100 Mbps - 20 Kpps

16 GB

Intel Dual-Core i5 2.2 GHz (2 Cores, 4 Threads) or equivalent


200 Mbps - 40 Kpps

16 GB

Intel Dual-Core i7 2.0 GHz (2 Cores, 4 Threads) or equivalent


500 Mbps - 100 Kpps

32 GB

Intel Quad-Core i7 3.40 GHz (4 Cores, 8 Threads) or equivalent

Disk Space


Sensei uses Elastic Search Engine as its backend to process the Big Data. Please spare at least 5 MB of disk space per hour per megabit/second throughput.

If you’re running a 100 Mbps link (about 100 users) which is quite active during the daytime and idle rest of the day, you can calculate the space needed as follows:

5 MB x 12 hours x 100 Mbps = 6 GB per day.
6 GB x 7 days a week = 42 GB per week.
42 x 4 weeks a month = 164 GB per month.


As of 0.7.0 ::italic::(changelog) , Sensei retires reports data to open up space for the new coming data. After the configured timespan, existing reports data is automatically purged to save space for fresh data.