Re: decremental backup

sorry, i just found the man entry saying that the decremental backup
is not compatible with delta binary - i'll have to settle for
incremental delta sig

On Mon, 23 Aug 2021 at 08:47, griffin tucker
<darsuporpt340-DSTKDfZ7/[email protected]> wrote:
>
> i've got two existing full backups and the command i'm using in my
> script is to make the decremental is:
> dar -+ "../${prev}-decr" --delta sig --ref="../${prev}-full"
> --aux="../${current}-full" --hash=sha512 --slice=2G
> --overwriting-policy Pp --alter=decremental --alter=keep-compressed
>
> however interactively i'm asked:
>
> EA and FSA of file <ROOT>/siteinfo-namespaces.json.gz-sha1sum.txt are
> about to be dropped from the archive and marked as already saved,
> proceed? [return = YES | Esc = NO]
>
> repeatedly for every file
>
>
> i can add the -w switch so it stops asking interactively, however this
> results in the resulting archive being roughly the same size as the
> aux archive
>
> i know the differental backups work incrementally with much smaller
> resulting archives, however i want to do decremental - what am i doing
> wrong? i've tried various different overwriting policies with no
> impact on the result
>
>
> just fyi, dar -V is:
>
>  dar version 2.7.1, Copyright (C) 2002-2021 Denis Corbin
>    Long options support         : YES
>
>  Using libdar 6.4.0 built with compilation time options:
>    gzip compression (libz)      : YES
>    bzip2 compression (libbzip2) : YES
>    lzo compression (liblzo2)    : YES
>    xz compression (liblzma)     : YES
>    zstd compression (libzstd)   : YES
>    lz4 compression (liblz4)     : YES
>    Strong encryption (libgcrypt): YES
>    Public key ciphers (gpgme)   : YES
>    Extended Attributes support  : YES
>    Large files support (> 2GB)  : YES
>    ext2fs NODUMP flag support   : YES
>    Integer size used            : 64 bits
>    Thread safe support          : YES
>    Furtive read mode support    : YES
>    Linux ext2/3/4 FSA support   : YES
>    Mac OS X HFS+ FSA support    : NO
>    Linux statx() support        : YES
>    Detected system/CPU endian   : little
>    Posix fadvise support        : YES
>    Large dir. speed optimi.     : YES
>    Timestamp read accuracy      : 1 nanosecond
>    Timestamp write accuracy     : 1 nanosecond
>    Restores dates of symlinks   : YES
>    Multiple threads (libthreads): YES (1.3.2)
>    Delta compression (librsync) : YES
>    Remote repository (libcurl)  : YES
>    argon2 hashing (libargon2)   : YES
>
>  compiled the Aug 17 2021 with GNUC version 10.2.1 20210110
>  dar is part of the Disk ARchive suite (Release 2.7.1)
>  dar comes with ABSOLUTELY NO WARRANTY; for details
>  type `dar -W'. This is free software, and you are welcome
>  to redistribute it under certain conditions; type `dar -L | more'
>  for details.