: High-performance storage (SAN, NAS, or DAS) is required to maintain low I/O latency.
show status show hardware show version active cisco cucm virtualization requirements
Why? CUCM uses a real-time database (informix/PostgreSQL depending on version). Any memory contention will cause call processing delays, database corruption, or node failures. : High-performance storage (SAN, NAS, or DAS) is
Real-time call processing engines require instantaneous access to computational cycles. : High-performance storage (SAN
: One virtual CPU (vCPU) must map directly to one physical CPU core (pCore).