2 CQRS Architectures that Every Software Architect Should Know
Tags: Domain Driven Design, Clean Code, Software, Domains, Edsger W. Dijkstra’s quotes about SoC

CQRS Architectures

Command Query Responsibility Segregation (CQRS) architectures expand the concept of command-query division at the architectural level. But these architectures are not architectures of the whole software system. It is a design of just one part of the software and that part is called the Application Layer.

If you are looking for the architectures of the entire software system, follow the link to my article about Domain-Centric Architectures below.

CQRS suggests dividing the Application Layer into two sides, the commands side, and the queries side.

The queries side should be responsible and optimized for reading data. Queries are reading data from persistence and then map them into the presentation layer required form. Such forms are mostly identified as Data Transfer Objects (DTOs).

The commands side should be responsible and optimized for writing data. Commands are executing use-cases, changing the states of entities, and saving them into persistence.

https://carepropertyinvest.be/property/bro-v-A-01.html

https://carepropertyinvest.be/property/bro-v-A-02.html

https://carepropertyinvest.be/property/bro-v-A-03.html

https://carepropertyinvest.be/property/bro-v-A-04.html

https://carepropertyinvest.be/property/bro-v-A-05.html

https://carepropertyinvest.be/property/bro-v-A-06.html

https://www.ausy.fr/usy/bro-v-A-01.html

https://www.ausy.fr/usy/bro-v-A-02.html

https://www.ausy.fr/usy/bro-v-A-03.html

https://www.ausy.fr/usy/bro-v-A-04.html

https://www.ausy.fr/usy/bro-v-A-05.html

https://www.ausy.fr/usy/bro-v-A-06.html

https://leeuwinestate.com.au/state/bro-v-A-01.html

https://leeuwinestate.com.au/state/bro-v-A-02.html

https://leeuwinestate.com.au/state/bro-v-A-03.html

https://leeuwinestate.com.au/state/bro-v-A-04.html

https://leeuwinestate.com.au/state/bro-v-A-05.html

https://leeuwinestate.com.au/state/bro-v-A-06.html

https://www.uvirtual.edu.co/wordpress/uvirtual/bro-v-A-01.html

https://www.uvirtual.edu.co/wordpress/uvirtual/bro-v-A-02.html

https://www.uvirtual.edu.co/wordpress/uvirtual/bro-v-A-03.html

https://www.uvirtual.edu.co/wordpress/uvirtual/bro-v-A-04.html

https://www.uvirtual.edu.co/wordpress/uvirtual/bro-v-A-05.html

https://www.uvirtual.edu.co/wordpress/uvirtual/bro-v-A-06.html

https://aopa.com.au/aopa/bro-v-A-01.html

https://aopa.com.au/aopa/bro-v-A-02.html

https://aopa.com.au/aopa/bro-v-A-03.html

https://aopa.com.au/aopa/bro-v-A-04.html

https://aopa.com.au/aopa/bro-v-A-05.html

https://aopa.com.au/aopa/bro-v-A-06.html

https://www.cojob.fr/cojob/bro-v-A-01.html

https://www.cojob.fr/cojob/bro-v-A-02.html

https://www.cojob.fr/cojob/bro-v-A-03.html

https://www.cojob.fr/cojob/bro-v-A-04.html

https://www.cojob.fr/cojob/bro-v-A-05.html

https://www.cojob.fr/cojob/bro-v-A-06.html

https://carepropertyinvest.be/careon/e-1/Chel-v-Newc-liv-epl-01.html

https://carepropertyinvest.be/careon/e-1/Chel-v-Newc-liv-epl-02.html

https://carepropertyinvest.be/careon/e-1/Chel-v-Newc-liv-epl-03.html

https://carepropertyinvest.be/careon/e-1/Chel-v-Newc-liv-epl-04.html

https://carepropertyinvest.be/careon/e-1/Chel-v-Newc-liv-epl-05.html

https://carepropertyinvest.be/careon/e-1/Chel-v-Newc-liv-epl-06.html

https://carepropertyinvest.be/careon/e-1/Chel-v-Newc-liv-epl-07.html

https://carepropertyinvest.be/careon/e-1/Chel-v-Newc-liv-epl-08.html

https://carepropertyinvest.be/careon/e-1/Chel-v-Newc-liv-epl-09.html

https://www.ausy.fr/alena/e-1/Chel-v-Newc-liv-epl-01.html

https://www.ausy.fr/alena/e-1/Chel-v-Newc-liv-epl-02.html

https://www.ausy.fr/alena/e-1/Chel-v-Newc-liv-epl-03.html

https://www.ausy.fr/alena/e-1/Chel-v-Newc-liv-epl-04.html

https://www.ausy.fr/alena/e-1/Chel-v-Newc-liv-epl-05.html

https://www.ausy.fr/alena/e-1/Chel-v-Newc-liv-epl-06.html

https://www.ausy.fr/alena/e-1/Chel-v-Newc-liv-epl-07.html

https://www.ausy.fr/alena/e-1/Chel-v-Newc-liv-epl-08.html

https://www.ausy.fr/alena/e-1/Chel-v-Newc-liv-epl-09.html

https://www.ausy.fr/alena/e-1/New-v-Che-li-Q00.html

https://www.ausy.fr/alena/e-1/New-v-Che-li-Q01.html

https://www.ausy.fr/alena/e-1/New-v-Che-li-Q02.html

https://www.ausy.fr/alena/e-1/New-v-Che-li-Q03.html

https://www.ausy.fr/alena/e-1/New-v-Che-li-Q04.html

https://www.ausy.fr/alena/e-1/New-v-Che-li-Q05.html

https://www.ausy.fr/alena/e-1/New-v-Che-li-Q06.html

https://www.ausy.fr/alena/e-1/New-v-Che-li-Q07.html

https://www.ausy.fr/alena/e-1/New-v-Che-li-Q08.html

https://carepropertyinvest.be/careon/e-1/New-v-Che-li-Q00.html

https://carepropertyinvest.be/careon/e-1/New-v-Che-li-Q01.html

https://carepropertyinvest.be/careon/e-1/New-v-Che-li-Q02.html

https://carepropertyinvest.be/careon/e-1/New-v-Che-li-Q03.html

https://carepropertyinvest.be/careon/e-1/New-v-Che-li-Q04.html

https://carepropertyinvest.be/careon/e-1/New-v-Che-li-Q05.html

https://carepropertyinvest.be/careon/e-1/New-v-Che-li-Q06.html

https://carepropertyinvest.be/careon/e-1/New-v-Che-li-Q07.html

https://carepropertyinvest.be/careon/e-1/New-v-Che-li-Q08.html

https://carepropertyinvest.be/careon/e-1/c-v-ep0000.html

https://carepropertyinvest.be/careon/e-1/c-v-ep0001.html

https://carepropertyinvest.be/careon/e-1/c-v-ep0002.html

https://carepropertyinvest.be/careon/e-1/c-v-ep0003.html

https://carepropertyinvest.be/careon/e-1/c-v-ep0004.html

https://www.ausy.fr/alena/e-1/c-v-ep0000.html

https://www.ausy.fr/alena/e-1/c-v-ep0001.html

https://www.ausy.fr/alena/e-1/c-v-ep0002.html

https://www.ausy.fr/alena/e-1/c-v-ep0003.html

https://www.ausy.fr/alena/e-1/c-v-ep0004.html

By separating read and write operations we increase the performance and support the Separation of Concerns principle in our systems.

There are three main types of CQRS architectures you can implement.