Status History Repository
The Status History Repository contains the information for the Component Status History and the Node Status History tools in the User Interface. The following properties govern how these tools work.
|
Property |
Description |
|---|---|
nifi.components.status.repository.implementation |
The Status History Repository implementation. The default value is
org.apache.nifi.controller.status.history.VolatileComponentStatusRepository,
which stores status history in memory.
org.apache.nifi.controller.status.history.EmbeddedQuestDbStatusHistoryRepository
is also supported and stores status history information on disk so that it is
available across restarts and can be stored for much longer periods of
time. |
nifi.components.status.snapshot.frequency |
This value indicates how often to capture a snapshot of the components'
status history. The default value is 1 min. |
In memory repository
If the value of the property
nifi.components.status.repository.implementation is
VolatileComponentStatusRepository, the status history data will be
stored in memory. If the application stops, all gathered information will be lost.
The buffer.size and snapshot.frequency work together
to determine the amount of historical data to retain. As an example, to configure two
days' worth of historical data with a data point snapshot occurring every 5 minutes you
would configure snapshot.frequency to be "5 mins" and the buffer.size
to be "576". To further explain this example, for every 60 minutes there are 12 (60 / 5)
snapshot windows for that time period. To keep that data for 48 hours (12 * 48) you end
up with a buffer size of 576.
| Property | Description |
|---|---|
nifi.components.status.repository.buffer.size |
Specifies the buffer size for the Status
History Repository. The default value is 1440. |
Persistent repository
If the value of the property
nifi.components.status.repository.implementation is
EmbeddedQuestDbStatusHistoryRepository, the status history data will
be stored to the disk in a persistent manner. Data will be kept between restarts.
| Property | Description |
|---|---|
nifi.status.repository.questdb.persist.node.days |
The number of days the node status data (such as
Repository disk space free, garbage collection information, etc.) will be
kept. The default values is 14. |
nifi.status.repository.questdb.persist.component.days |
The number of days the component status data
(i.e., stats for each Processor, Connection, etc.) will be kept. The default
value is 3. |
nifi.status.repository.questdb.persist.location |
The location of the persistent Status History
Repository. The default value is
./status_repository. |
