VA-003 Explain Vault architecture Practice Question
A company deploys Vault in a single data center with 3 nodes using Integrated Storage. The application team reports that secret reads are slow, with median latency of 200ms. The Vault cluster is under moderate load of 100 requests per second. The administrator checks the server metrics and sees that the Raft commit latency is low, but the HTTP request handling time is high. The Vault nodes are running on virtual machines with 4 vCPUs and 8GB RAM each. The administrator suspects that the bottleneck is due to resource contention. What should the administrator do to reduce read latency without compromising availability?
⚠ Common exam trap
HashiCorp often tests the distinction between scaling reads with performance standbys versus scaling the cluster with additional Raft nodes, where candidates mistakenly assume adding more cluster nodes will improve read performance without considering the consensus overhead.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add performance standby nodes to the cluster to handle read requests.
Adding performance standby nodes is the correct solution because they are specifically designed to handle read requests without participating in the Raft consensus protocol. Since the bottleneck is high HTTP request handling time (not Raft commit latency), performance standbys offload read traffic from the active cluster nodes, reducing latency without affecting write availability or requiring changes to the existing cluster topology.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Add performance standby nodes to the cluster to handle read requests.
Why this is correct
Performance standbys reduce read latency by bypassing Raft.
- ✗
Increase the CPU and memory of the existing Vault nodes.
Why it's wrong here
May help but does not specifically address read latency; performance standbys are better.
- ✗
Switch to a Consul storage backend with more Consul servers.
Why it's wrong here
Adding complexity; may not reduce latency.
- ✗
Add more Vault nodes to the cluster to distribute read load.
Why it's wrong here
More nodes increase Raft overhead and may increase latency.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This VA-003 practice question is part of Courseiva's free HashiCorp certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the VA-003 exam.