Database / ValKey Interview questions
Describe Valkey replication?
Valkey uses a primary-replica (leader-follower) model where one or more replicas maintain a live copy of a primary's dataset, asynchronously, by default.
A replica connects, performs a synchronization using PSYNC, receives either a full RDB transfer or a diskless socket-based transfer, and then keeps applying the stream of write commands the primary forwards from its replication backlog.
Replicas can themselves be chained to sub-replicas, and after a short disconnect a replica can often resume with a partial resynchronization instead of a full resync, as long as its last known offset is still present in the primary's backlog.
By default, Valkey replication propagates writes to replicas...
A brief network blip between a primary and a replica can often be recovered via...
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