[CentOS] How to dump/restore a CentOS 7 system

Wed Sep 25 18:03:48 UTC 2019
John Pierce <jhn.pierce at gmail.com>

On Wed, Sep 25, 2019, 10:20 AM mark <m.roth at 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.