Description of problem: Newly introduced cache(pool) support in lvm2 currently allows to cache only a single LV. This interface might not be the best for a user with a single large rotational drive and small SSD where he would need to create small caches for individual LVs (since the dm-cache support only 1:1 mapping) However cache-pool may also serve to cache a whole single PV - thus we may hide the complexity from a user (as he would be now forced to 'stack' dm-cache PV on his own) and allow to use a single SSD for all LVs from 1 PV (thus still matching 1:1). The other method which we may explore is - to combine all LVs into 1 large mapping and use LVs this way - this would allow to map even multiple PVs into a single cache device - but with number of problems to resolve when i.e. LVs are resized. Version-Release number of selected component (if applicable): 2.02.106 How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
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