Re: Btrfs data recovery

Christian Rene Thelen posted on Sun, 13 Aug 2017 19:12:48 +0200 as excerpted: > I have formated an encrypted disk, containing a LVM with a btrfs system. > > All superblocks appear to be destroyed; the btrfs-progs tools can't find > the root tree anymore and scalpel, binwalk, foremost & co return

Re: [PATCH v4 4/5] squashfs: Add zstd support

On Sun, Aug 13, 2017 at 9:31 AM, Geert Uytterhoeven wrote: > On Fri, Aug 4, 2017 at 10:19 PM, Nick Terrell wrote: >> --- a/fs/squashfs/decompressor.c >> +++ b/fs/squashfs/decompressor.c >> @@ -65,6 +65,12 @@ static const struct squashfs_decompressor >>

Re: btrfs issue with mariadb incremental backup

Hi Chris, Thank you very much for your suggestion. I didn't remember which steps that I made a mistake and made the mysql had Received UUID. I have done the following and it work as it should be right now. [root@backuplogC7 mariadb]# btrfs subvolume snapshot mbroken_201708070830

Re: btrfs issue with mariadb incremental backup

Hi "A L", Thank you very much for your suggestion. I've got it. It work properly right now. what I have done are following. mv all current mysql and snapshot mysql to mbroken and mbroken_yymmddhhmm btrfs subvolume snapshot mbroken to mysql (to make it rw subvolume without Recieve UUID) btrfs

Building a BTRFS test machine

Would that be useful to build a BTRFS test machine, which will perform both software tests (btrfs send | btrfs receive, read/write random data etc.) and hardware tests, such as abrupt power off test, abruptly removing a raid-X disk physically, etc. If it would be useful, what tests should it

Re: [RFC] Checksum of the parity

On Sun, Aug 13, 2017 at 8:45 PM, Chris Murphy wrote: > Further, the error detection of corrupt reconstruction is why I say > Btrfs is not subject *in practice* to the write hole problem. [2] > > [1] > I haven't tested the raid6 normal read case where a stripe contains >

Re: btrfs issue with mariadb incremental backup

From: siranee...@tpc.co.th -- Sent: 2017-08-13 - 16:00 > Hi "A L", > > As your suggestion. Does it mean I have to make all my current subvolumes to > clear > "Receive UUID" and send them with full snapshots? You need to clear all subvolumes with 'Received UUID' in order to use

Re: btrfs issue with mariadb incremental backup

On Sun, Aug 13, 2017 at 4:52 AM, wrote: > Hi "A L", > > [root@backuplogC7 ~]# btrfs sub show /var/lib/mariadb/mysql > /var/lib/mariadb/mysql > Name: mysql > UUID: 92f319c5-e132-3249-9b13-d39ee77a2b44 > Parent UUID:

Re: btrfs issue with mariadb incremental backup

On Sun, Aug 13, 2017 at 4:49 AM, wrote: > [root@backuplogC7 ~]# btrfs send /var/lib/mariadb/mysql_201708090830 | ssh > 192.168.45.166 btrfs receive /var/lib/mariadb > At subvol /var/lib/mariadb/mysql_201708090830 > At subvol mysql_201708090830 > [root@backuplogC7 ~]# rsync

Re: [RFC] Checksum of the parity

On Sun, Aug 13, 2017 at 8:16 AM, Goffredo Baroncelli wrote: > Hi all, > > in the BTRFS wiki, in the status page, in the "line" RAID5/6 it is reported > that the parity is not checksummed. This was reported several time in the ML > and also on other site (e.g. phoronix) as a

Re: Btrfs data recovery

On Sun, Aug 13, 2017 at 11:12 AM, Christian Rene Thelen wrote: > I have formated an encrypted disk, containing a LVM with a btrfs system. > > All superblocks appear to be destroyed; This is an unclear description. I don't understand the exact layout of the storage stack, and what

Re: Btrfs data recovery

On Sun, Aug 13, 2017 at 07:12:48PM +0200, Christian Rene Thelen wrote: > I have formated an encrypted disk, containing a LVM with a btrfs system. What did you format it as? (i.e. what are the locations of the damaged blocks?) > All superblocks appear to be destroyed; the btrfs-progs tools

Btrfs data recovery

I have formated an encrypted disk, containing a LVM with a btrfs system. All superblocks appear to be destroyed; the btrfs-progs tools can't find the root tree anymore and scalpel, binwalk, foremost & co return only scrap. The filesystem was on an ssd and mounted with -o compression=lzo. How

lazytime mount option—no support in Btrfs

Back in 2014 Ted Tso introduced the lazytime mount option for ext4 and shortly thereafter a more generic VFS implementation which was then merged into mainline. His early patches included support for Btrfs but those changes were removed prior to the feature being merged. His changelog includes

[RFC] Checksum of the parity

Hi all, in the BTRFS wiki, in the status page, in the "line" RAID5/6 it is reported that the parity is not checksummed. This was reported several time in the ML and also on other site (e.g. phoronix) as a BTRFS defect. However I was unable to understand it, and I am supposing that this is a

Re: RedHat 7.4 Release Notes: "Btrfs has been deprecated" - wut?

On 08/12/2017 02:12 PM, Hugo Mills wrote: > On Sat, Aug 12, 2017 at 01:51:46PM +0200, Christoph Anton Mitterer wrote: >> On Sat, 2017-08-12 at 00:42 -0700, Christoph Hellwig wrote: [...] >> good, but csum is not > >I don't think this is a particularly good description of

Re: btrfs issue with mariadb incremental backup

Hi "A L", As your suggestion. Does it mean I have to make all my current subvolumes to clear "Receive UUID" and send them with full snapshots? >> mysql >> mysql_201708060830 >> mysql_201708070830

Re: btrfs issue with mariadb incremental backup

On 8/13/2017 12:52 PM, siranee...@tpc.co.th wrote: Hi "A L", [root@backuplogC7 ~]# btrfs sub show /var/lib/mariadb/mysql /var/lib/mariadb/mysql Name: mysql UUID: 92f319c5-e132-3249-9b13-d39ee77a2b44 Parent UUID:-

Re: btrfs issue with mariadb incremental backup

Hi "A L", [root@backuplogC7 ~]# btrfs sub show /var/lib/mariadb/mysql /var/lib/mariadb/mysql Name: mysql UUID: 92f319c5-e132-3249-9b13-d39ee77a2b44 Parent UUID:- Received UUID:

Re: btrfs issue with mariadb incremental backup

Hi Chris, Try deleting mysql_201708090830/ snapshot on the destination. And resend but this time do a full send of that snapshot, don't use -p. I wonder if a full send, rather than incremental makes a difference. Follow it up with the rsync command to compare origin and destination. Yes, It's

Re: [PATCH v4 4/5] squashfs: Add zstd support

On Fri, Aug 4, 2017 at 10:19 PM, Nick Terrell wrote: > --- a/fs/squashfs/decompressor.c > +++ b/fs/squashfs/decompressor.c > @@ -65,6 +65,12 @@ static const struct squashfs_decompressor > squashfs_zlib_comp_ops = { > }; > #endif > > +#ifndef CONFIG_SQUASHFS_ZSTD > +static

Re: btrfs issue with mariadb incremental backup

Have you checked that there is no Received UUID on the source subvolume? # btrfs sub show volume/mysql/ volume/mysql     Name:   mysql     UUID:   8a94524e-a956-c14b-bb8d-d453627f27d5     Parent UUID:    -     Received UUID:  -