How deeply does ScyllaDB in Action cover read-your-writes?

Defines the guarantee, recommends QUORUM reads and writes, and contrasts ONE with datacenter-specific quorum variants.

Read-your-writes

Read-your-writes consistency is a consistency guarantee that a client’s later reads reflect its completed writes.

Read-your-writes consistency guarantees that a client’s later reads reflect its completed writes. In ScyllaDB, QUORUM consistency for both reads and writes provides this behavior and prevents queries from accessing stale data. section 8.2.2

Choose a consistency level according to the balance between consistency, availability, and cluster load:

Use QUORUM for reads and writes when clients should read recently written data and tolerate the loss of at least one node with replication factor 3. section 8.2.2
Use ONE for reads when lower cluster load matters and the application can tolerate potentially stale data. section 8.2.2
Use LOCAL_QUORUM or EACH_QUORUM to control whether quorum obligations apply within one datacenter or across every datacenter. section 8.2.2

How ScyllaDB in Action covers it

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Related concepts

optimistic updateaddressed by · An optimistic update presents an expected change in client-side state before the corresponding operation is confirmed, then reconciles or reverses the change if needed.
replication laguses · Replication lag is the elapsed delay between a change being applied or committed at a source and becoming applied or visible at a replication target.
primary nodeuses · A primary node is a designated authoritative or coordinating member of a distributed system, typically responsible for accepting operations or coordinating replicated state.
consistencykind of · Consistency is the property of related data, behavior, outputs, or states agreeing with one another or conforming to defined rules across relevant instances or operations.

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