id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,launchpad_bug 1325,make `tahoe backup` keep more filesystem metadata,chrysn,nobody,"there is a number of probems due to which `tahoe backup` can not replace rsync style backups yet. the core of the problem is that tahoe-lafs can not keep all the information that is stored in a posix style file system. the issues i see are: * ctime/mtime is not saved * symlinks can not be saved (compare ticket #641, which has been around for two years) * other special files can not be saved (devices etc) * user, group and permissions are not saved * acls are not saved i am aware that tahoe has its own ways of dealing with permissions, that it has its own time stamps, and that directories work in a way that every directory entry is kind of a link anyway, but that's not the point -- it's about being able to restore a disk's contents from a backup. from my point of view, symlinks, times and user/group/permissions are the most important of these; device files are nowadays created on a ramdisk on the fly anyway, and acl users know the problem well enough to have their workarouds (afair this is an issue with most backup systems). implementation-wise, i guess that most if not all of this can be stored in the directory as additional information. if it is possible in trac, i suggest all related bugs to be marked as ""blocking"" this bug. is this something that is realistic to achieve for tahoe-lafs?",enhancement,new,major,undecided,unknown,1.8.1,,tahoe-backup metadata symlink hardlink,amontero@…,