Lessfs now supports asynchronous master/slave replication. Replication can be enabled and disabled with a simple ‘ echo 1 >/.lessfs/replication/enabled’ where 1 is enabled and 0 is disabled. Lessfs uses CRC32 checksums to ensure data integrity during data transfer between master and slave. See the README.replication file in the distribution for more details. Replication should still be considered alpha code. That said, it works for me.
The background delete/truncation code has stabilized to the point where it will become the default with the next release.