ng to do git merge, I guess).
>
> Has anyone come across this situation and evolved any policies to handle it?
You can't currently do this efficiently with send/receive. It
should be possible, but it needs a change to the send stream format.
Hugo.
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he interests
of consistency, checksums are disabled.
Hugo.
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On Fri, Oct 09, 2015 at 12:16:43AM +0200, Pavel Pisa wrote:
> Hello Hugo,
>
> On Thursday 08 of October 2015 23:13:52 Hugo Mills wrote:
> > On Thu, Oct 08, 2015 at 07:47:33AM -0400, Austin S Hemmelgarn wrote:
> > > On 2015-10-08 04:28, Pavel Pisa wrote:
> > > >
r the delay, I wrote this earlier, but had trouble sending it)
> It is theoretically possible to wipe the FS signature on the out-of
> sync drive, run a device scan, then run 'replace missing' pointing
> at the now 'blank' device, although going that route is really
> risky.
>
file's location will have changed. This is the
same reason that btrfs doesn't support swap files (although I don't
know if swapon uses FIEMAP directly, or if there's just some
equivalent mechanism to get the blocks).
Hugo.
--
Hugo Mills | Have found Lost City of Atlantis. High Priest
in.
Are you thinking of the read-only flag? That's not the same thing
as the various UUID properties (e.g. parent) which can be used to
detemine if a subvolume was made using a snapshot.
Hugo.
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hugo@... carfax.org.uk
raw storage.
Hugo.
or do they need to be of the same replication scheme too ?
On Jun 27, 2015, at 10:34 AM, Vincent Olivier vinc...@up4.com wrote:
ok i’ll go home and rethink my life then ;)
On Jun 27, 2015, at 10:21 AM, Hugo Mills h...@carfax.org.uk wrote:
On Sat, Jun 27
tried this one, because Samba and I get on like a house on fire(*).
Hugo.
(*) Screaming, shouting, people running away, emergency services.
--
Hugo Mills | Alert status mauve ocelot: Slight chance of
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http
> ZFS since the very first day. With snapshots & all the fancy stuff like
> ZRAID-1, lz4, ... My number of Issues there: 0
>
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- more corrupted.
Smart of the disk, it's not looks, like damaged. (attach)
What i can provide to help fix this issue?
If it's needed, i can recompile kernel with some parameters if it can
help, of course.
--
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hugo@... carfax.org.uk
doesn't work and eats
your filesystem, sets fire to your sofa and feeds strychnine to your
cat(*). I can't really recommend trying it.
You can change the UUID offline using a recent (4.1 or later)
version of btrfstune.
Hugo.
(*) No sofas were harmed in the writing of this email.
--
Hugo
there's some separate
handling to still keep the fs instances separate, but I don't know how
that works at all or how ext4 and Btrfs differ.
See my other email in this thread. :)
Hugo.
--
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hugo@... carfax.org.uk | better
. ;)
You need one full send to start off the process. After that, you
can use the incremental feature.
On Thu, Aug 27, 2015 at 05:59:47PM +, Hugo Mills wrote:
See my other email in this thread. :)
Didn't get that. Should I?
Yes, you should have got it. You were cc'd. It's the one
to help get it
working again.
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or
replace them (with different sizes).
Hugo.
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on the problem and should eventually get it right, but
it's just an incredibly difficult issue that has taken multiple tries.
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the FS to be
even partly recoverable with a missing device. (Or RAID-10, -5 or -6).
Hugo.
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hugo@... carfax.org.uk | commandment. It is a dire warning.
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. There's
probably not enough of it left to make anything coherent.
Hugo.
> Thanks
>
> 2015-09-04 23:17 GMT+02:00 Hugo Mills <h...@carfax.org.uk>:
> > On Fri, Sep 04, 2015 at 09:07:34PM +, Ivan wrote:
> >>
> >> Just to add this:
> >>
> &g
On Mon, Sep 07, 2015 at 11:58:45AM -0600, Chris Murphy wrote:
> On Sat, Sep 5, 2015 at 4:42 AM, Hugo Mills <h...@carfax.org.uk> wrote:
> > On Sat, Sep 05, 2015 at 12:13:30PM +0200, Ivan Petrovic wrote:
>
> >> So you're saying that I can't make first and third partition
ally going from 5-drive raid6 to 4-drive
> raid6).
>
> Can anyone confirm my assumption? Can I indeed rebalance from
> 5-drive raid6 to 4-drive raid6 if the volume is not too big?
Yes, you can, provided, as you say, the data is small enough to fit
into the reduced filesystem.
Hu
uld be a btrfs dev drop, which is the fail-like
operation: tell the FS that a device is useless, and should be dropped
from the array, so the FS doesn't keep trying to write to it. That's
not implemented yet, though.
Hugo.
--
Hugo Mills | Alert status mauve ocelot: Slight chanc
; > make a mess of things...
>
> It is not possible to add a device to an ro filesystem, so effectively
> the fs read-writeability is broken in this case.
I thought this particular issue had already been dealt with in 4.2?
(i.e. you can still mount an FS RW if it's degraded,
On Tue, Sep 08, 2015 at 10:33:54PM +0200, Ian Kumlien wrote:
> On 8 September 2015 at 22:28, Hugo Mills <h...@carfax.org.uk> wrote:
> > On Tue, Sep 08, 2015 at 02:17:55PM -0600, Chris Murphy wrote:
> >> On Tue, Sep 8, 2015 at 2:13 PM, Ian Kumlien <ian.kuml...@gm
probably will. These are going to take
a very long time to run (in your case, I'd guess at least a week for
each balance). I would recommend starting the balance in a tmux or
screen session, and also creating a second shell in the same session
to run monitoring processes. I typically use something lik
63414272(gen: 293905 level: 0) seems good, but
> generation/level doesn't match, want gen: 293924 level: 2
> Well block 100290560(gen: 293904 level: 0) seems good, but
> generation/level doesn't match, want gen: 293924 level: 2
> Well block 61906944(gen: 293904 level: 0) seems good, but
> generation/level doesn't match, want gen: 293924 level: 2
> Well block 99393536(gen: 293903 level: 0) seems good, but
> generation/level doesn't match, want gen: 293924 level: 2
> Well block 79740928(gen: 293903 level: 0) seems good, but
> generation/level doesn't match, want gen: 293924 level: 2
> Well block 47403008(gen: 293901 level: 2) seems good, but
> generation/level doesn't match, want gen: 293924 level: 2
> Well block 42622976(gen: 293899 level: 2) seems good, but
> generation/level doesn't match, want gen: 293924 level: 2
> Well block 40329216(gen: 293898 level: 2) seems good, but
> generation/level doesn't match, want gen: 293924 level: 2
> Well block 38137856(gen: 293897 level: 2) seems good, but
> generation/level doesn't match, want gen: 293924 level: 2
> Well block 36515840(gen: 293896 level: 2) seems good, but
> generation/level doesn't match, want gen: 293924 level: 2
> -x--x---x--x--
>
> Thanks in advance
>
>
> mit freundlichen Grüßen
> Jürgen Sauer
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with
zeroes -- which is no worse than the random data you're likely to
encounter from reading the broken data that the FS is (rightly)
protecting you from.
Hugo.
--
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hugo@... carfax.org.uk | here, di verse it gets
http://
oadmap, but the roadmap is notoriously
> short-sighted when it comes to time-frame for completion of
> something. You have to understand also that the focus in BTRFS has
> also been more on data safety than performance, because that's the
> intended niche, and the area most people look to ZF
king
> >about general purpose use or is he talking about general purpose OLTP use?
> >
> My takeaway was that he intended 'general purpose use' to mean
> generic every day usage across a wide variety of systems, he was not
> particularly specific about it however.
- --
Hugo M
]
No. If you try doing that particular combination of features, you
end up with a filesystem that can be inconsistent: there's a race
condition between updating the data in a file and updating the csum
record for it, and the race can't be fixed.
Hugo.
--
Hugo Mills | I spent most of my
by having one (for RAID-0) or up to three (for
RAID-10) devices with more space left than the rest.
Hugo.
--
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> diff --git a/tests/generic/110.out b/tests/generic/110.out
> new file mode 100644
> index 000..64049da
> --- /dev/null
> +++ b/tests/generic/110.out
> @@ -0,0 +1,3 @@
> +QA output created by 110
> +wrote 66560/66560 bytes at offset 0
> +XXX Bytes, X ops; XX:XX:
On Tue, Sep 29, 2015 at 06:13:37PM +0800, Qu Wenruo wrote:
>
>
> 在 2015年09月29日 18:00, Hugo Mills 写道:
> >On Tue, Sep 29, 2015 at 05:34:24PM +0800, Qu Wenruo wrote:
> >>Normally, a bull fallocate call on a fully written and synced file
> >>should not add an
that time though) and mounted it just fine with the
> LABEL only, so it might be something with RAID5.
>
> Anyway it's working now with just a much longer fstab line ;)
>
> Cheers,
> Sjoerd
>
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w to force data recompression?
btrfs fi defrag -c
Hugo.
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ke this on one
> machine:
>
> [ 256MB ][ 512 MB ][ 256MB ]
>
> And like this on the other:
> [ 512MB ][ 512MB ]
>
> Since the checksums are per block, and the blocks can be different
> arrangements on different machines, they're not
l
support your use of btrfs on a kernel that old). 3.19 is about the
earliest kernel I'd feel happy about using at this point.
Hugo.
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On Wed, Sep 23, 2015 at 03:12:26PM +0200, David Sterba wrote:
> On Tue, Sep 22, 2015 at 02:36:02PM +0000, Hugo Mills wrote:
> > > Yeah, right now there's no persistent default for the allocator. I'm
> > > still hoping that the object properties will magically solve that
On Wed, Sep 23, 2015 at 09:19:38PM +0800, Qu Wenruo wrote:
> 在 2015年09月23日 21:12, David Sterba 写道:
> >On Tue, Sep 22, 2015 at 02:36:02PM +0000, Hugo Mills wrote:
> >>>Yeah, right now there's no persistent default for the allocator. I'm
> >>>still hoping that the
>
> [root@rak ~]# btrfs --version
> btrfs-progs v4.2
>
> [root@rak ~]# btrfs fi show
> Label: 'data' uuid: 754a3186-c0ae-4680-ab28-864c8bdad8b5
> Total devices 1 FS bytes used 1.23TiB
> devid1 size 1.72TiB used 1.24TiB path /dev/sdb2
>
> bt
een the extremes of reckless rsync and overly
> accurate git. It's just a steep learning mountain.
>
>
> *) I used fdupes' output ran through a perl script that calls
> "cp --reflink" for each match. Would "bedup" or "duperemove"
> do a better job? bed
- the 4.3.x (mainline)?
>
> Stable sounds more stable to me(hence the name ;) ), but the mainline kernel
> seems to be in more active development?
I'd suggest sticking to the 4.2 series for now. 4.3 will be in
pre-release state for another couple of months (give or take).
et, which
should then show up in btfs fi show, and allow you to keep using the
FS.
Hugo.
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As it stands, we can fake that in mkfs but it'll get stomped
> > by balance nearly immediately.
>
> Please share those casual thoughts with the group. :)
I had some as well last year (see my other mail). I hope they line
up with Jeff's. :)
Hugo.
--
Hug
PeU52cfWHL05axe8l75pU6Ywwrk406QxyrTvx
> 2Rh8tXBJItUeMA/D8mRnwWVZBWFUndl6JlBNSyf51fSP+4lPkChbM5UnSOjDOwvE
> E7XpGy31TQI0bqpy8qoIkI9wkek6iOlMCppZ9U2vICbeP+65WtNZKfQcCO0t6Z1H
> 6IqfHsaDvvaiorxEWWIarsIfHZWnWJeav545t6pd4VU3v52YQN2YIOLY8EhWv4Wt
> 90Xc1izPvPvnyQa3eQPg1ISdqNfJRFlYjSJ75zGvSPurIy77oOyvPa1EfEO7IMys
>
s mounted in two
> different places, and that I have some VMs on it, and am using the
> nocow attribute on the VM files.
>
> Regards,
> Sylvain
--
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http://carfax
nted (and it's definitely a
> bug that it's not doing so today), but is unlikely to be ideal for a
> different filesystem than the one it started out as.
>
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evice after I have unmount it? BTW: Is btrfs-progs needed for mounting?
>
> I should have been more clear and say "run btrfs check", which I originally
> intended to write but then somehow didn't. Sorry. :-)
>
> btrfs-progs is not needed for mounting, only for administrativ
On Tue, Sep 22, 2015 at 04:23:33PM +0200, David Sterba wrote:
> On Tue, Sep 22, 2015 at 01:41:31PM +0000, Hugo Mills wrote:
> > On Tue, Sep 22, 2015 at 03:36:43PM +0200, Holger Hoffstätte wrote:
> > > On 09/22/15 14:59, Jeff Mahoney wrote:
> > > (snip)
> > >
On Tue, Sep 22, 2015 at 10:54:45AM -0400, Austin S Hemmelgarn wrote:
> On 2015-09-22 10:36, Hugo Mills wrote:
> >On Tue, Sep 22, 2015 at 04:23:33PM +0200, David Sterba wrote:
> >>On Tue, Sep 22, 2015 at 01:41:31PM +, Hugo Mills wrote:
> >>>On Tue, Sep 22, 20
ing the latest stable, and things have
improved quite a bit. :)
Hugo.
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> Yes, I have bad ram. I ran memtest and memory is really bad.
> >
> > So a must buy new memory first.
> >
> > Thank you.
> >
> > Frantisek
> >
> > 2015-09-23 16:43 GMT+02:00 Hugo Mills <h...@carfax.org.uk>:
> >> On Wed, Sep 23, 2
, PSU, or CPU would be manifesting
> with many more issues than just this.
> 3. A disk failure would mean that two different disks, from
> different manufacturing lots, are encountering errors on exactly the
> same LBA's at exactly the same time, which while possible is
> a
fs scrub start /t4
> ERROR: scrub is already running.
> To cancel use 'btrfs scrub cancel /t4'.
> To see the status use 'btrfs scrub status [-d] /t4'.
>
>
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or ext4 support removing the
> norecovery option from the mount flags through mount -o remount?
> Even if they don't, that might be a nice feature to have in BTRFS if
> we can safely support it.
One minor awkwardness with "norecovery", I've just realised: we
already h
d function correctly
when received. (I can give you chapter and verse on how they're used
if you like, but that's a bit excessive just for answering your
question here).
Hugo.
> Thank you
>
> PS: Apologies for sending a second mail, somehow my first try didn't contain
> any
On Sat, Dec 05, 2015 at 04:28:24AM +0100, Christoph Anton Mitterer wrote:
> On Fri, 2015-12-04 at 13:07 +0000, Hugo Mills wrote:
> > I don't think it'll cause problems.
> Is there any guaranteed behaviour when btrfs encounters two filesystems
> (i.e. not talking about
to implement it first for non-remountable case as a try.
> And for the option name, I prefer something like "notreereplay", but
> I don't consider it the best one yet
Thinking out loud...
no-log-replay, no-log, hard-ro, ro-log,
really-read-only-i-mean-it-this-time-honest-guvnor
Delete hyphens at your pleasure.
Hugo.
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t anywhere near as simple as copying it with dd. The UUID
> gets used internally somehow, and changing it would require rewriting
> _all_ the metadata blocks.
Indeed, but there is now a tool to do that. :) (btrfstune -u or -U)
Hugo.
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tracebacks,
> because it's the method chosen to deliberately trigger them.
It's not just btrfs. Invalid opcode is the way that the kernel's
BUG and BUG_ON macro is implemented.
Hugo.
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it's known there's a
> >mismatch.
> >
> That gets tricky too, because for example you have stuff like flat
> files used as filesystem images.
>
> However, if we then use some separate UUID (possibly hashed off of
> the file location) in place of the device serial/WWN, th
On Tue, Dec 15, 2015 at 09:27:12AM -0500, Austin S. Hemmelgarn wrote:
> On 2015-12-15 09:18, Hugo Mills wrote:
> >On Tue, Dec 15, 2015 at 08:54:01AM -0500, Austin S. Hemmelgarn wrote:
> >>On 2015-12-14 16:26, Chris Murphy wrote:
> >>>On Mon, Dec 14, 2015 at
erblock to find the tree of tree
roots, and then follow that into the other trees (at which point, you
can start using the data structures page).
Hugo.
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http
uestion is: can I achieve that directly with BTRFS
> RAID10?
No, not at the moment.
Hugo.
--
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e insertion,
> formatting, mounting, copying to then from, and device yanking is here
> (should be permanent):
> http://pastebin.com/raw/Wfe1pY4N
>
> And the copy did successfully complete anyway, and the resulting files
> have the same hashes as their originals. So, yay, despite
tree. If one of those doesn't match up with a
currently-known device for that filesystem (as determined by btrfs dev
scan), then it's missing.
Hugo.
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On Mon, Dec 21, 2015 at 09:28:37AM +, Filipe Manana wrote:
> On Mon, Dec 21, 2015 at 8:14 AM, Hugo Mills <h...@carfax.org.uk> wrote:
> > On Sun, Dec 20, 2015 at 07:26:07PM -0600, Donald Pearson wrote:
> >> I read an implication in a different thread that defrag an
e the same
> ID.
>
> This seem to confuse UDEV, because /dev/disk/by-uuid seem to show
> just one link, not two links to two disks.
>
> Is there a way to change the BTRFS ID (generate new one) that I can
> differentiate between the two disks on one host?
btrfstune, with -u or -U
H
Isn't this an FAQ already? There is already a patch to rename the
RAID modes. It's been sitting in the progs patch queue for about 2
years, because none of the senior devs has acked it yet (since it's a
big user-visible change).
Hugo.
--
Hugo Mills | Talking about music i
> So whenever you do your recovery works, make sure that there's never a
> moment where more than one btrfs block device appears with the same
> UUID.
> Even when it's just for some seconds it may already cause corruption.
>
>
> Cheers,
> Chris.
--
Hugo Mills |
, but don't even know
> what they are in the context of btrfs. If it's a single file, how do
> I use the corrupt leaf, bad key order block number to see what it
> corresponds to, like I did with btrfs inspect-internal with the
> inodes?
--
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te, as well as just the piece
that's being written by userspace).
Hugo.
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oot 8
> [ 25.855431] BTRFS: could not find root 8
> [ 25.856834] BTRFS: could not find root 8
> [ 25.860539] BTRFS: could not find root 8
> [ 25.862021] BTRFS: could not find root 8
> [ 29.778795] IPv6: ADDRCONF(NETDEV_UP): enp3s0: link is not ready
> …
>
fy the disk
data after an unclean shitdown, in order to be useful (because the FS
isn't consistent without the journal replay).
Hugo.
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On Wed, Nov 25, 2015 at 12:20:09AM +0100, Christoph Anton Mitterer wrote:
> On Tue, 2015-11-24 at 21:55 +0000, Hugo Mills wrote:
> > In practice, new content is checked by a number of people when
> > it's
> > put in, so the case of someone putting random poorly-thought-out
On Wed, Nov 25, 2015 at 12:01:49AM +0100, Christoph Anton Mitterer wrote:
> On Tue, 2015-11-24 at 22:33 +0000, Hugo Mills wrote:
> > whereas a read-only mount of a journalling FS _must_ modify the disk
> > data after an unclean shitdown, in order to be useful (because the FS
>
parent IDs accordingly...
Pretty much, yes.
Note that the "parent" of send -p and of snapshots is not the same
relationship as the "parent" (containing subvol) of the tree
structure. This is an awkward nomenclature problem, and I'm not sure
how to fix it.
The first m
(writable)
snapshot of the reference subvol, and modifies it according to the
stream data. -c makes a new empty subvol, and populates it from
scratch, using the reflink ioctl to use data which is known to exist
in the reference subvols.
Hugo.
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Hugo Mills | Anyone who claims
; >total extent tree bytes: 3075457024
> >btree space waste bytes: 2880474254
> The only other thing I know that's worth mentioning is that if the
> numbers on these next two lines don't match, you may be missing some
> writes from right before the crash.
> >file data blocks al
expect
> it (e.g. the defrag or the balance+compression case?)... btrfs seem to
> require much more in-depth knowledge and especially care (that even
> depends on the type of data) on the end-user/admin side than the
> traditional filesystems.
> Are there for example any gene
s.
Hugo.
> Thank you!
> Mario
>
> [1]
> http://git.kernel.org/cgit/linux/kernel/git/mkp/linux.git/commit/?h=bugzilla-93581=7c4fbd50bfece00abf529bc96ac989dd2bb83ca4
> [2] https://bugzilla.kernel.org/show_bug.cgi?id=93581
--
Hugo Mills | I was cursed with poetry very youn
That's the quota tree. I don't know exactly what's happening, but
possibly systemd is now enabling qgroups for its own purposes, and
what you're seeing is simply the qgroups being enabled for the first
time?
Hugo.
--
Hugo Mills | Great oxymorons of the world, no. 8:
hugo@... carfa
We've just had someone on IRC with a problem mounting their FS. The
main problem is that they've got a corrupt log tree. That isn't the
subject of this email, though.
The issue I'd like to raise is that even with -oro as a point
option, the FS is trying to replay the log tree. The dmesg
btrfs --convert=single --force balance, btfs
> device remove, btr balance start -mconvert=dup --force and finally
> balance start again.
>
> Is there any solution to solve this more elegantly?
Recreate the FS with --mixed, and that should deal with it.
Hugo.
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Hugo Mills | There isn't a noun that can't be verbed.
hugo@... carfax.org.uk |
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On Tue, Nov 24, 2015 at 10:36:26PM +0100, Christoph Anton Mitterer wrote:
> On Tue, 2015-11-24 at 21:27 +0000, Hugo Mills wrote:
> > -p only sends the file metadata for the changes from the reference
> > snapshot to the sent snapshot. -c sends all the file metadata, but
&g
On Mon, Nov 30, 2015 at 11:48:01AM -0500, Chris Mason wrote:
> On Sat, Nov 28, 2015 at 01:46:34PM +0000, Hugo Mills wrote:
> >We've just had someone on IRC with a problem mounting their FS. The
> > main problem is that they've got a corrupt log tree. That isn't the
> >
On Mon, Nov 30, 2015 at 09:59:40AM -0500, Austin S Hemmelgarn wrote:
> On 2015-11-28 08:46, Hugo Mills wrote:
> >We've just had someone on IRC with a problem mounting their FS. The
> >main problem is that they've got a corrupt log tree. That isn't the
> >subject
> >>would lose the fact that global reserve is actually in use, that the
> >>broken out global reserve line exposes.
> >>
> >>I'd actually argue in favor of the latter, directly folding global
> >>reserve allocation into metadata used, sinc
er. This is typically too much data
allocation, and metadata has run out (so -d is more often used than
-m).
For the "usual" case of running out of metadata allocation, you
don't actually need much space to reclaim, so -dlimit=X for small X is
an easier approach to
s that by
> >> default. Never heard of snapper before.
> >>
> >> Don't see how open files could be a problem, since the computer has
> >> been rebooted several times.
> >>
> >> I wonder... could the distribution upgrade have moved all the old
> &g
that can be put in place (true CoW rather than
btrfs's redirect-on-write, like some databases do, where the original
data is copied elsewhere before overwriting; cache aggressively and
with knowledge of the CoW nature of the FS, like ZFS does), but they
all have their drawbacks and pathologica
guration, applied
to the top of subvol 5. If the feature allows configuration on a
per-subvol or per-object basis, then there should also be a name for
the relevant xattr (also in the btrfs namespace) that can be created
on each object as required.
Hugo.
--
Hugo Mills | Klytus, I'm
te
> the number that the split starts looping.
For reference for anyone replying, we've already had this
conversation as far as I could manage it on IRC a few days ago:
http://logs.tvrrug.org.uk/logs/%23btrfs/2016-05-29.html#2016-05-29T10:13:53
Hugo.
--
Hugo Mills | In one respect at l
lance decides where to put data from chunks it frees? I.e. let's
> say I have one free data chunk and 10 chunks filled to 10%. Will "btrfs
> ba start -dusage=10" pack data from all 10 chunks into single one, this
> freeing 10 chunks for further processing?
Yes, it w
schemes, so we'll use a standard random number source or API.
>
> /dev/random gives about 1-2MB/s of random data on several machines I've
> tried.
Just use /dev/urandom?
See, e.g. http://www.2uo.de/myths-about-urandom/
Hugo.
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hugo@... carfax.org.uk |
http://carfax.org.uk/ |
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an 'end cmd' marker in the stream.
>
> ie. all the context lines start with two spaces instead of one. I'll
> apply this patch manually but please have a look.
Looking at this, I suspect it's a consequence of sending it as
"Content-Type: format=flowed; delsp=yes". I'm not sure wh
ndexing works (concatenation of the key elements, resulting in
lexical ordering of keys), you'd still have to do exactly the same
work, only in the kernel instead. The only thing you really win is the
number of context switches.
It would really have to be a new ioctl, too. You can't change the
behaviour of the existing one.
Hugo.
> >
> > So, the important line here was: "...when the extent_item just
> > manages to squeeze in as last result into the current result buffer
> > from the ioctl..."
> >
>
>
--
Hugo Mills | "What are we going to do tonight?"
hugo@... carfax.org.uk | "The same thing we do every night, Pinky. Try to
http://carfax.org.uk/ | take over the world!"
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ee that appears to be currently unused, so
> perhaps I will look at developing a group-aware allocator instead of
> just limiting the chunk width.
I made some design notes on a generalised approach for this a while
ago:
http://www.spinics.net/lists/linux-btrfs/msg33782.html
http://www.spi
ocated: 18.19TiB
> Device missing: 0.00B
> Used:0.00B
> Free (estimated):0.00B (min: 8.00EiB)
>
> btrfs --version ==> btrfs-progs v4.5.3-70-gc1c27b9
> kernel ==> 4.6.0
>
>
--
Hugo Mi
suspension, so it would be a really bad idea.
In general, this would be the use-case for LVM. However, that's a
dangerous operation with btrfs, because the snapshot ends up being
included in the original FS (because it has the same UUID), and thus
causes the kernel to get ver
t easily start a balance on a
> remote system via a ssh command, which is the specific use case I
> have).
There's quite a bit of infrastructure in the userspace tools to
deal with managing an asynchronous scrub. It would probably be worth
looking at that in the first instance to see if it can be reused for
balance.
Hugo.
--
Hugo Mills |
hugo@... carfax.org.uk | __(_'>
http://carfax.org.uk/ | Squeak!
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