Answer
Primary reads are strongly consistent, while secondary reads are eventually consistent and used for load balancing.
Quick Answer
Primary reads: always fresh, consistent, but all reads go to one node (can be bottleneck). Secondary reads: distributed across replica set members, reduces primary load, but data may be slightly behind (replication lag). Use secondaries for read-heavy analytics workloads or reporting where slight staleness is acceptable. Never read from secondaries for data that needs to be immediately consistent.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ