MemStac is Memcached compatible object caching solution that delivers breakthrough application performance by leveraging tiered-memory architecture based on DDR and NVMe SSD. MemStac uses advanced data classification and latency management algorithms and it optimally tiers data objects of varying sizes and frequency across a pool of tiered-memory. By providing higher capacity, MemStac delivers higher cache hit rates and application performance compared to DRAM based solutions like Memcached. MemStac is well suited for scalable cluster-based deployments in low-latency cloud applications.