25 Sep
2019
25 Sep
'19
8:03 p.m.
On Wed, Sep 25, 2019, 10:20 AM mark m.roth@5-cent.us wrote:
Someone mentioned commercial software - I've cloned systems, esp. compute nodes in a cluster - with rsync.
Problem with rsync clones, they are asynchronous each file is copied separately so if the system is live and making changes, for instance a database server, the copy is not coherent.
the ZFS file system is perfect for this stuff, you can snap shot and then ZFS send the snapshot or a delta between that snapshot and a previous snapshot and that creates a totally coherent copy made at a single point in time atomically.