Seems like open-noatime is a new option as it doesn't appear in the documentation of my rsync 3.1.2 version.
Is the suggestion that by having TopDir mounted in a noatime filesystem, then open-noatime will assure that atimes are not read/written on the remote BackupPc-client, thereby saving time since atimes are not read/updated then on either the BackupPC client or server? If that is correct, wouldn't it be simple to update rsync-bpc to support the option since it's effect would only be on the remote BackupPC client side (rsync-bpc would presumably ignore it on the BackupPC server side since even if TopDir is not noatime, it wouldn't be obvious on the server to know what files to ignore atimes on (pool? attrib?). Either way, how big are the savings here? Craig Barratt via BackupPC-users wrote at about 10:48:22 -0800 on Friday, February 11, 2022: > The rysnc open-noatime option isn't supported by rsync-bpc. > > Like Jeff, I use the noatime mount option on my BackupPC filesystem. > > Craig > > On Fri, Feb 11, 2022 at 8:46 AM <backu...@kosowsky.org> wrote: > > > Kenneth Porter wrote at about 18:44:40 -0800 on Thursday, February 10, > > 2022: > > > Is anyone using the rsync/rsyncd method with the open-noatime option to > > > avoid unnecessary metadata writes when comparing files? > > > > > Not sure what open-noatime means... but I have been running backuppc > > using rsync (not rsyncd) on btrfs with the noatime mount option for 2+ > > years now without incident. > > > > BTW, why are you using 'rsyncd' vs. 'rsync'? > > I used it to use it in the past on an ancient slow arm-based NAS > > because rsyncd was marginally faster than rsync. > > But otherwise 'rsyncd' seems to have more security issues (e.g., it > > relies on storing an ASCII password in a file) and seems more > > cumbersome to set up. > > > > With 'rsync' you just need to setup vanilla rsync login under cygwin > > with nothing else to configure. > > > > Using my inline perl for dump pre/post user commands, you can even > > have it automate snapshotting (via VSS shadow copies) before backup > > (including creating and deleting shadow copies) without any extra > > client-sided code... > > > > > I'm disabling atime on all my Linux partitions and wondering if that > > option > > > has any effect on Cygwin rsyncd running on my Windows 10 clients. > > > > > > It does look like NTFS has the file property, and Win10 has some > > registry > > > settings for controlling when it's updated: > > > > > > < > > https://winaero.com/disable-ntfs-last-access-time-updates-in-windows-10/> > > > > > > > > > > > > _______________________________________________ > > > BackupPC-users mailing list > > > BackupPC-users@lists.sourceforge.net > > > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > > > Wiki: https://github.com/backuppc/backuppc/wiki > > > Project: https://backuppc.github.io/backuppc/ > > > > > > _______________________________________________ > > BackupPC-users mailing list > > BackupPC-users@lists.sourceforge.net > > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > > Wiki: https://github.com/backuppc/backuppc/wiki > > Project: https://backuppc.github.io/backuppc/ > > > _______________________________________________ > BackupPC-users mailing list > BackupPC-users@lists.sourceforge.net > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > Wiki: https://github.com/backuppc/backuppc/wiki > Project: https://backuppc.github.io/backuppc/ _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: https://github.com/backuppc/backuppc/wiki Project: https://backuppc.github.io/backuppc/
