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Longterm DB: Difference between revisions
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*# traffic graph in 5 minute resolution | *# traffic graph in 5 minute resolution | ||
The storage is used similar to a swap file mechanism | The storage is used similar to a swap file mechanism. The long-term data needs to be written in a format readable by new versions. Since firmware version 4.5, this is done automatically on restarts. An option allows to write the DB back into a persisted format on a daily basis. | ||
==Usage== | ==Usage== | ||
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To enable this feature, select a storage device to be used, enable the feature and enter a file size. | To enable this feature, select a storage device to be used, enable the feature and enter a file size. | ||
The option "Data persistence mode" allows to select an alternative mode which also dumps parts of the live database onto disc. This increases the amount of space and time required to write the data and is usually not necessary. | |||
The long-term data base can be persisted once per day by enabling the corresponding option and selecting a time of day where the dump should happen. It is recommended to enable this option and to choose a time with less traffic then usual to avoid system overload during the dump time. | |||
Once enabled, the utilization of the file is shown and the [[System Info Page]] contains information about how long the data can be kept. | Once enabled, the utilization of the file is shown and the [[System Info Page]] contains information about how long the data can be kept. | ||
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It is also not recommended to place the long-term DB on the same storage device that is used a packet ring buffer as it will deteriorate the performance of both features. | It is also not recommended to place the long-term DB on the same storage device that is used a packet ring buffer as it will deteriorate the performance of both features. | ||
The feature can be disabled temporarily and the last snapshot of persisted data is still kept. To remove this data permanently, use the delete buttons at the bottom of the configuration page. | |||
== Limitations == | == Limitations == | ||