vmselect also includes a built-in web interface called “vmui” that helps users explore data visually, troubleshoot queries, and understand how collected metrics affect system performance. Unlike the cluster version, which splits responsibilities across multiple components ( vminsert , vmstorage , and vmselect ), the single-node version performs all these tasks within one process. A single-node VictoriaMetrics setup can also achieve high availability—similar to the cluster version—by running two identically configured VictoriaMetrics instances in separate data centers.