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nixos/postgresqlBackup: add --rsyncable to compression programs

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The --rsyncable option changes the behavior of gzip/zstd so that the
resulting files can be incrementally backed up easily. Tools like Borg,
rsync and xdelta can make use their deduplication/diff mechanisms more
easily.

In my local testing, this resulted in a 2% size increase for backup
files.

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>
This commit is contained in:
Sefa Eyeoglu 2023-11-26 13:22:51 +01:00 committed by Robert Helgesson
parent 786100e12d
commit 0aaf428fde
1 changed files with 2 additions and 2 deletions
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4
nixos/modules/services/backup/postgresql-backup.nix
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@ -17,8 +17,8 @@ let
compressCmd = getAttr cfg.compression {
"none" = "cat";
"gzip" = "${pkgs.gzip}/bin/gzip -c -${toString cfg.compressionLevel}";
"zstd" = "${pkgs.zstd}/bin/zstd -c -${toString cfg.compressionLevel}";
"gzip" = "${pkgs.gzip}/bin/gzip -c -${toString cfg.compressionLevel} --rsyncable";
"zstd" = "${pkgs.zstd}/bin/zstd -c -${toString cfg.compressionLevel} --rsyncable";
};
mkSqlPath = prefix: suffix: "${cfg.location}/${db}${prefix}.sql${suffix}";