All Notes

Snapshot Isolation prevents Read Skews

Read Skew

Snapshot Isolation

Transactions

Database

Most databases do not support true Isolation

Isolation

Serializable Isolation

Leverage databases to avoid concurrency problems

Concurrency

Transactions

Joins between Read Models introduces the need for transactions

Read Model

Transactions

Transactions are a necessity for most applications

Transactions

NoSQL

Schemaless

Read Models hold autonomous data

CQRS

Read Model

Multiple read models can be derived from a single data point

Read Model

Event Sourcing

Read Model data is best stored in Document databases

Read Model

Schemaless

Data in Read Models is expendable

Read Model

Automatic retries on transaction failure are not foolproof

ACID

Recovery

Transactions

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