I've used LMDB in production for multi-terabyte databases, and we encountered the long-write time but found a solution.
The important idea is that LMDB offloads cache management almost completely to the OS. You have to become intimately familiar with the way that the page cache works and how to configure it.
Comments
I've used LMDB in production for multi-terabyte databases, and we encountered the long-write time but found a solution.
The important idea is that LMDB offloads cache management almost completely to the OS. You have to become intimately familiar with the way that the page cache works and how to configure it.