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Description

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= A na0x00EFve implementation of key-value storages like AgoRapide may lead to excessive memory (RAM) consumption.0x000D0x000A0x000D0x000AAgoRapide has been designed in order to be easy to start with, but still with inbuilt flexibility to reduce memory consumption as your database grows and your application matures.0x000D0x000A0x000D0x000A-CoreDB- will mostly store data on disk and have little need for RAM. Sidenote: Although the -PropertyStream--format is somewhat verbose it is well suited for on-disk compression.0x000D0x000A0x000D0x000A-ArmDB- / -Client- using -PRich- is more sensitive to RAM but you have a great flexibility in how much data they actually have to subscribe to.0x000D0x000A0x000D0x000AThis is because the implementations of -IP- in -ARCCore- are chosen dynamically according to need.0x000D0x000ASee for instance use of the -PValue- class, which will be dynamically replaced with a -PRich- instance if a need for storing meta-data like -Cid-, -Created- or similar arises.0x000D0x000A0x000D0x000AExample: If the -PropertyStream- contains the following:0x000D0x000A0x000D0x000ACustomer/42/FirstName = John0x000D0x000ACustomer/42/FirstName.Cid = Agent/42 // Creator id (entity which created this property). See -Cid-0x000D0x000A...0x000D0x000ACustomer/42/FirstName.Valid = 2021-02-10 // Timestamp when property was last known to be (still) valid. See -Valid-0x000D0x000A0x000D0x000Athen a full subscription to the customer-object like '+dt/Customer/*' would initially result in a -PValue- object being created by -TryStore-, then it would be replaced with a -PRich- in order to also stored metadata Cid and Valid.0x000D0x000A0x000D0x000AHowever, if a -Subscription- does not include any of this meta-data, like '+dt/Customer/*/FirstName', '+dt/Customer/*/LastNamethen only a -PValue- instance will be created at the subscriber side, because the metadata will not be received.0x000D0x000AThis means that single nodes in the system can have reduced memory consumption just by judiciously chosing what data is subscribed to.0x000D0x000A0x000D0x000ANOTE: You can use the memory efficient -PExact- class0x000D0x000ANOTE: as basis for your 'entity' classes when you know exactly what you want to store in them and0x000D0x000ANOTE: when you do not need to store any meta-data like -Cid- and -Created-.0x000D0x000A0x000D0x000ASee -ARCDoc-, especially classes -Apple-, -Orange- and -Banana- for different compromises between memory usage and easy of development.0x000D0x000A0x000D0x000ASee also -Indexing-.

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Generated 2025-06-19 21:45:41.457 UTC