Software Versions & Server Sizing
Software versions
The software versions currently used are:
- MQTT Broker: ActiveMQ 5.14+ http://activemq.apache.org/
- Database Postgresql 9.4+ http://www.postgresql.org/
- Timeseries Database: InfluxDB 0.8+ http://influxdb.com/ (new! → Influxdada1.3)
- Application server: Tomcat 8+ http://tomcat.apache.org/
All of them have built it redundancy capabilities.
Server Sizing
Sizing is highly dependent on the number of sensors and the polling intervals. Please refer to /wiki/spaces/SIT/pages/26542101 for more information.
This number should be taken only as a reference, the final sizing would be done during each project.
General assumptions:
- 50 sensor points per location
- Average 15 min interval
- 500 users working parallel with web-gui
| Instance | Memory | CPU Cores | Storage |
|---|---|---|---|
| Small | 8 GB | 2 | 100 GB |
| Medium | 16 GB | 4 | 500 GB |
| Large | 32 GB | 8 | 2 TB |
Tomcat Application Server
For anything larger than 1000 sites we would recommend to separate data-processing server and Web-Interface server (tomcat).
Locations (up to) | Tomcat (data processing) | Tomcat (web interface) | Load Balancer |
|---|---|---|---|
1000 | Medium | ||
3000 | Medium | Medium | Small |
5000 | Medium | Medium | Small |
10000 | Large | Large | 2x Medium |
30000 | 2x Large | Large (500 users) | 2x Medium |
Sizing influences | Sensors, intervals | Web users | |
ActiveMQ
Locations (up to) | ActiveMQ | Comment |
|---|---|---|
1000 | Medium | (or 2x Small – reliability) |
3000 | Medium | (or 2x Small – reliability) |
5000 | 2x Medium (1Master 1 Slave) | |
10000 | 2x Large (1Master 1 Slave) | |
30000 | 3x Large (1Master 2 Slaves) |
Sizing Influences:
- number of sensors
- polling interval
Databases
- PostgreSQL (or any other SQL)
- InfluxDB
Locations (up to) | Databases | Comment |
|---|---|---|
1000 | Medium |
|
3000 | Medium |
|
5000 | Large | (or 2x Medium – reliability) |
10000 | 1x Large 1x Medium | 1 Cluster 1 Shard |
30000 | 3x Large | 1 Cluster 2 Shard |
Sizing influences:
- number of sensors
- polling interval
- historical data persistance time
Storage and Bandwidth
Please refer to /wiki/spaces/SIT/pages/26542101 for further information.