title: Cache Inclusion Property- Multilevel Caching
body: <p>I am not able to understand the concepts of cache inclusion property in multi-level caching. As per my understanding, if we have 2 levels of cache, L1 and L2 then the contents of L1 must be a subset of L2. This implies that L2 must be at least as large as L1. Further, when a block in L1 is modified, we have to update in two places L2 and Memory. Are these concepts correct ?</p>