Hi there, On Sun, 5 Aug 2018, daggs wrote:
I have a windows installation running inside a kvm vm, for past experience, backup using the samba protocol is unreliable ...
For more than a decade, using the SMB protocol, I've backed up some hundreds of Windows machines, and a fair number of SMB shares on Linux boxes, with perfectly acceptable reliability - even over considerably less than perfect network connections. Perhaps you're doing something especially tricky that you haven't mentioned, but otherwise I suspect that with a little effort you could make it work reliably too.
... I want to run a script on the vm's host ... run the backup and run another script on the vm's host ... the main idea is to mount the image remotely, use rsync to backup and unmount the image.
Are you planning to back up the entire Windows VM image each time? The design of BackupPC makes it most useful in the situation where there are many files, potentially distributed across many machines, potentially replicated many times, most of which, most of the time, will not change from one backup to the next. Think of a corporate site, containing a number of buildings full of offices, and in each office there are numerous workstations. Here and there on the site there are a few servers. It is in this kind of situation that I've applied BackupPC successfully, occasionally saving somebody's bacon. BackupPC wins most when a small proportion of a large number of small files changes between each backup, and this success is extended when at least some of the files permit substantial compression. If even a single byte in a large file changes, on the next backup BackupPC will store a complete new copy of the file. It will make no attempt to do anything like a binary diff to store just the changes. Patches would I'm sure be welcome. :) If you plan to back up an image of a single VM, then (1) there's only one file, (2) it's very large, (3) it's difficult to compress and (4) it probably changes every few seconds. If I were planning to back up an entire VM image then BackupPC would not be my first choice for the backup the tool. I would think that it would add considerable complexity for no practical benefit. -- 73, Ged. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
