Jak przechowywać zdarzenia w Event Sourcingu
Event store brzmi egzotycznie, ale to zwykła baza danych. Trzyma zdarzenia pogrupowane według rekordu, którego dotyczą, nowe zawsze dopisuje na końcu i daje te same gwarancje, których oczekujesz od bazy danych. Gdy to zobaczysz, łatwiej odpowiesz sobie na pytania o wydajność, spójność i wybór narzędzia.
Pierwsze artykuły wyjaśniają ten model i w godzinę budują prosty event store na PostgreSQL. Pokazują też, że bazy relacyjne w środku działają podobnie. Kolejne opisują, jak inne części systemu pamiętają, które zdarzenia już przetworzyły. Ostatnie zaglądają głębiej, do elementów, na których to wszystko stoi, i sprawdzają, czy S3 albo temporal tables mogą pełnić tę samą rolę.
Nie potrzebujesz tej wiedzy, żeby korzystać z gotowego event store’a. Pomoże ci za to zrozumieć, co gwarantuje i dlaczego.
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