Performance Standby Nodes, like traditional High Availability standby
nodes, service read-only requests from users or applications.
Read-only requests are requests that do not modify Vault's storage. Vault quickly scales its ability to service these operations,
providing a near-linear request-per-second scaling for most scenarios and secrets engines like K/V and Transit. Traffic is distributed across performance standby nodes, allowing clients to scale these IOPS horizontally, and control high traffic workloads.
If a request comes into a Performance Standby Node that causes a storage to write
the request, the request is forwarded to the active server. Read-only requests are serviced locally on the Performance Standby.
Like traditional HA standbys, a Performance Standby Node becomes the active instance when the active node is sealed, fails, or loses
