On Fri, 27 Oct 2017 12:56:36 +0200 Gandalf Corvotempesta <gandalf.corvotempe...@gmail.com> wrote:
> What happens if I remove "--checksum" from "full" backups ? Monstrosities: * an A380 will holographically crash onto your house, * your dog/cat/children/wife/goldfish will turn gay, * you'll awake one morning and all your machines will be reinstalled with DOS-2.0, * you'll dream of Bill Gates every night until you pass away, etc… and apart that, may be: http://backuppc.sourceforge.net/faq/BackupPC.html#Rsync-checksum-caching can help as a base; in v.4.x, there are some light differences: http://backuppc.sourceforge.net/BackupPC-4.1.3.html This i going against: "I don't think so, because on incrementals BPC doesn't use "--checksum" at all." (v.4.x doc): $Conf{RsyncFullArgsExtra} = [ ... ]; Additional arguments for a full rsync or rsyncd backup. The --checksum argument causes the client to send full-file checksum for every file (meaning the client reads every file and computes the checksum, which is sent with the file list). On the server, rsync_bpc will skip any files that have a matching full-file checksum, and size, mtime and number of hardlinks. Any file that has different attributes will be updating using the block rsync algorithm. In V3, full backups applied the block rsync algorithm to every file, which is a lot slower but a bit more conservative. To get that behavior, replace --checksum with --ignore-times. the server may not send any chksum command, but this states that the client will anyway use them. So I'll join "l, rick" saying that if you deactivate it, your full backups will take "a while" - test it, but you won't love it. Jean-Yves ------------------------------------------------------------------------------ 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/
