Platform Historian

A platform historian is a "friendly named" historian on a VOLTTRON instance. It always has the identity (see vip) of platform.historian. A platform historian is made available to a volttron central agent for monitoring of the VOLTTRON instances health and plotting topics from the platform historian. In order for one of the (historians)[Historians] to be turned into a platform historian the identity keyword must be added to it's configuration with the value of platform.historian. The following configuration file shows a sqlite based platform historian configuration.

{
    "agentid": "sqlhistorian-sqlite",
    "identity": "platform.historian",
    "connection": {
        "type": "sqlite",
        "params": {
            "database": "~/.volttron/data/platform.historian.sqlite"
        }
    }
}

The platform historian will publish data about the current environment to the following topics. These topics can be pasted into the volttron central environment and will be able to be graphed appropriately.

Index	Topic
1	datalogger/log/platform/status/cpu/times_percent/guest_nice
2	datalogger/log/platform/status/cpu/times_percent/system
3	datalogger/log/platform/status/cpu/percent
4	datalogger/log/platform/status/cpu/times_percent/irq
5	datalogger/log/platform/status/cpu/times_percent/steal
6	datalogger/log/platform/status/cpu/times_percent/user
7	datalogger/log/platform/status/cpu/times_percent/nice
8	datalogger/log/platform/status/cpu/times_percent/iowait
9	datalogger/log/platform/status/cpu/times_percent/idle
10	datalogger/log/platform/status/cpu/times_percent/guest
11	datalogger/log/platform/status/cpu/times_percent/softirq