Thanks, chattr +C is that's what I am currently using. Also you already answered my next question, why it is not possible to set +C attribute on the existing file :) Yours sincerely, Konstantin V. Gavrilenko ----- Original Message ----- From: "Roman Mamedov" <rm@xxxxxxxxxxx> To: "Konstantin V. Gavrilenko" <k.gavrilenko@xxxxxxxxxx> Cc: "Linux fs Btrfs" <linux-btrfs@xxxxxxxxxxxxxxx> Sent: Friday, 12 January, 2018 9:37:49 PM Subject: Re: btrfs subvolume mount with different options On Fri, 12 Jan 2018 17:49:38 +0000 (GMT) "Konstantin V. Gavrilenko" <k.gavrilenko@xxxxxxxxxx> wrote: > Hi list, > > just wondering whether it is possible to mount two subvolumes with different mount options, i.e. > > | > |- /a defaults,compress-force=lza You can have use different compression algorithms across the filesystem (including none), via "btrfs properties" on directories or subvolumes. They are inherited down the tree. $ mkdir test $ sudo btrfs prop set test compression zstd $ echo abc > test/def $ sudo btrfs prop get test/def compression compression=zstd But it appears this doesn't provide a way to apply compress-force. > |- /b defaults,nodatacow Nodatacow can be applied to any dir/subvolume recursively, or any file (as long as it's created but not written yet) via chattr +C. -- With respect, Roman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
