It's important to understand LMDB is an edge case design that wants the fastest reads possible and is willing to significantly burden the write path in that int

It's important to understand LMDB is an edge case design that wants the fastest reads possible and is willing to significantly burden the write path in that interest. Immutability is still a powerful approach. For a good example read the MSR papers on the hekaton main memory engine's approach: http://research.microsoft.com/apps/pubs/default.aspx?id=178758 http://research.microsoft.com/apps/pubs/default.aspx?id=1787... The original post isn't exactly wrong, it's just something of a straw man. We live in an era of terabyte disks. Cold data storage is cheap.