/ doc / toc / ARCCore / Enum / ARComponents / ARCSync / __TOCDet / Description

Description

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= (Not implemented as of March 2020)0x000D0x000A0x000D0x000AA library providing a basic framework for synchronizing with other data sources (data sources outside of AgoRapide).0x000D0x000A0x000D0x000ABackground: One important use of AgoRapide is envisaged to be analyzing of existing databases (with the help of for instance -ARCQuery-). In order to do the analysis the data has to be converted into the format of AgoRapide (-PropertyStream- and continously kept synchronized in an efficient manner.0x000D0x000A0x000D0x000A-ARCSync- is also what you use when you do not want AgoRapide to be your main database.0x000D0x000AAs long as your main database uses the 'key-value' principle and you can query data from it in chronological order, it is usually quite easy to keep AgoRapide synchronized to it.0x000D0x000A0x000D0x000ASome database especially well suited in this regard are:0x000D0x000A- Apache Kafka0x000D0x000A- Amazon AWS DynamoDB0x000D0x000A- Azure Cosmos DB0x000D0x000AAgoRapide integrates quite naturally with these.0x000D0x000ANote that using AgoRapide against these databases also reduces egress costs since downstream caching is inbuilt in AgoRapide.0x000D0x000AIn a typical situation you can have one AgoRapide node subscribing to the key-value stream, with all other nodes connecting to that one.0x000D0x000AWhen the occasional need for an -AdHocQuery- arises that would be O(n) in AgoRapide you can instead query directly against the main database (which would more probably have a performance of O(1)).0x000D0x000AIf that query turns out to be permanently needed, then you set up a -Subscription- for it against -CoreDB- in order to cache it locally, eliminating the egress cost and ensuring an even speedier response.0x000D0x000A0x000D0x000A-ARCSync- is not to be confused with the concept of how different AgoRapide based nodes synchronize between themselves (see -Subscription-. That functionality is built into -ARCCore-.

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