Customers can use these procedures to obtain detailed statistics, including the popular request for Tunnels (loss, latency, jitter and so on), interface and flow statistics.
Note: The process for retrieving CPU and memory stats for each EdgeConnect follows a different process and is not file-based.
### Getting Statistics Time Range
Appliances generate statistics every minute. Each minute, appliances generate statistics of different types in different CSV files. These CSV files are zipped into a single file for convenience. Appliances are also configured to keep only a certain number of these files. Appliances also retain statistics for a specified time period only. The polling systems (Orchestrator or third-party systems) must get their data before these files age out. Most appliances are configured to keep this data for at least a few hours. You can configure the length of time appliances keep data in the Orchestrator.
A poller calls the following REST API to get a range of timestamps for which data is present on the appliance:
This will return the following output:
These two numbers are minute boundaries expressed in standard epoch seconds. This example indicates Tuesday, April 12, 2022, 3:49:00 PM to Monday, April 11, 2022, 3:45:00 PM.
### Polling for a Specific Minute
Once you obtain the time range, you can iterate over every minute (or start from the last minute not yet retrieved). For example:
The API for retrieving a zip file for a specific minute looks like this:
All the file names start with st2- and are followed by a minute timestamp in epoch seconds. The file extension is .tgz
Specific to 9.3, the Statistics ZIP file content contains the following:
tunnel.csv, tunnel_peak.csv, tunnel_v2.txt
interface.csv, interface_peak.csv, interface_v2.txt
flow.csv, flow_peak.csv, flow_v2.txt
dscp.csv, dscp_peak.csv, dscp_v2.txt
tclass.csv, tclass_peak.csv, tclass_v2.txt
ftype.csv, ftype_peak.csv, ftype_v2.txt
These files are in two different formats:
The two formats are .csv and \_v2.txt files is the new format optimized for new StatsCollector. Customers are also recommended to use this file format.