If you don't mind out-of-tree kernel module, there is dm-writeboost https://github.com/akiradeveloper/dm-writeboost it's both read/write caching and especially optimized for write caching. If you are using Ubuntu or Debian, it's available in the packages. Also, we have management tool that includes init script so it's easy to start up. Akira -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
