In my case, using checksum will slow down everything about 10 times that's
why I've asked
A full backup without checksum usually takes about 6 hours, with checksum I
need 2 days
Il 27 ott 2017 4:25 PM, "Bzzzz" <lazyvi...@gmx.com> ha scritto:
> 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/
>
------------------------------------------------------------------------------
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/
