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The information in our interactive Radar is currently only available in English. To get information in your native language, please download the PDF here.

Techniques

Accumulate-only data

NOT ON THE CURRENT EDITION
This blip is not on the current edition of the radar. If it was on one of the last few editions it is likely that it is still relevant. If the blip is older it might no longer be relevant and our assessment might be different today. Unfortunately, we simply don't have the bandwidth to continuously review blips from previous editions of the radarUnderstand more
Nov 2015
assess?

Immutable data structures are becoming more popular, with functional languages such as Clojure and Scala providing immutability by default. Immutability allows code to be more easily written, read and reasoned about. Using an accumulate-only data store can confer some of these benefits in the database layer, as well as make audit and historical querying simple. Implementation options vary, from specific accumulative data stores such as Datomic to simply using an “append-don’t-update” approach with a traditional database. Accumulate-only is a design strategy whereby data is removed via retraction rather than update; append-only is an implementation technique.

May 2015
assess?

Immutable data structures are becoming more popular with functional languages such as Clojure providing immutability by default. Immutability allows code to be more easily written, read, and reasoned about. Using an append-only data store can confer some of these benefits in the database layer, as well as making audit and historical querying simple. Implementation options vary, from specific append-only data stores such as Datomic to simply using an “append-don’t-update” approach with a traditional database.

Jan 2015
assess?