Housekeeping

Intervall and Time Budget

interval and time budget is configured by setting up a StorageHousekeepingController.

Available properties are:

• interval the housekeeping is triggered in milliseconds, default once per every second

• time budget for housekeeping in nanoseconds, default is 0.01 seconds

File Sizes and Payload

The desired file min and max sizes and payload ratio is configured by the StorageDataFileEvaluator:

available properties are:

• Data file minimum size Files smaller then minimum file size will be merged with other files if possible, default is 1 MB.

• Data file maximum size Files larger then maximum file size will be split in smaller ones, default is 8 MB.

• Data file payload min ratio to trigger file refactoring, default is 0.75 (75%).

Cache

The lifetime of objects in the internal entity cache can be configured by the StorageEntityCacheEvaluator:

Available properties are:

• Entity cache threshold

  Abstract threshold value, roughly comparable to size in bytes with a time component, at which a cache must be cleared of some entities. Default is 1000000000.

• Entity cache timeout Time in milliseconds after that an entity is considered to be old if not read meanwhile. must be greater zero, default is 86400000ms (1 day).