Re: btrfs fi df won't show total=
On Tue, 2012-07-10 at 00:52 +0300, Ilya Dryomov wrote: mkfs creates those non-raid chunks for a pretty stupid reason, they really shouldn't be there if you create a raid10 fs. Balance does the right thing and removes them. Fixing this along with another mkfs annoyance related to this one is on my TODO list. Hi Ilya, I've also studied this bug and found where the problem is, if this will help you: In mkfs.c, make_root_dir function creates the first system and metadata chunk: ret = btrfs_make_block_group(trans, root, bytes_used, BTRFS_BLOCK_GROUP_SYSTEM, BTRFS_FIRST_CHUNK_TREE_OBJECTID, 0, BTRFS_MKFS_SYSTEM_GROUP_SIZE); ret = btrfs_alloc_chunk(trans, root-fs_info-extent_root, chunk_start, chunk_size, BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA); BUG_ON(ret); ret = btrfs_make_block_group(trans, root, 0, BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA, BTRFS_FIRST_CHUNK_TREE_OBJECTID, chunk_start, chunk_size); And these chunks are created again in create_raid_groups function. Both functions, make_root_dir and create_raid_groups are called from main function. Andrei -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
btrfs fi df won't show total=
On openSUSE_12.1 with Btrfs v0.19+20120406, the following can be observed: after a change of the profiles, total=,used= is no longer shown: 20:49 mmsrv1:~ # btrfs fi df /top.srv/ Data, RAID10: total=152.00GiB, used=121.07GiB System, RAID1: total=40.00MiB, used=44.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID1: total=112.00GiB, used=1.30GiB Metadata: total=8.00MiB, used=0.00 20:50 mmsrv1:~ # btrfs fi bal start -mconvert=raid10 -sconvert=raid10 /top.srv/ Refusing to explicitly operate on system chunks. Pass --force if you really want to do that. 20:52 mmsrv1:~ # btrfs fi bal start -mconvert=raid10 -sconvert=raid10 --force /top.srv/ ... 21:10 mmsrv1:~ # btrfs fi df /top.srv/ Data, RAID10: total=156.00GiB, used=124.35GiB System, RAID10: total=128.00MiB, used=48.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID10: total=112.00GiB, used=1.38GiB -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: btrfs fi df won't show total=
On Mon, Jul 09, 2012 at 09:14:03PM +0200, Jan Engelhardt wrote: On openSUSE_12.1 with Btrfs v0.19+20120406, the following can be observed: after a change of the profiles, total=,used= is no longer shown: 20:49 mmsrv1:~ # btrfs fi df /top.srv/ Data, RAID10: total=152.00GiB, used=121.07GiB System, RAID1: total=40.00MiB, used=44.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID1: total=112.00GiB, used=1.30GiB Metadata: total=8.00MiB, used=0.00 20:50 mmsrv1:~ # btrfs fi bal start -mconvert=raid10 -sconvert=raid10 /top.srv/ Refusing to explicitly operate on system chunks. Pass --force if you really want to do that. 20:52 mmsrv1:~ # btrfs fi bal start -mconvert=raid10 -sconvert=raid10 --force /top.srv/ ... 21:10 mmsrv1:~ # btrfs fi df /top.srv/ Data, RAID10: total=156.00GiB, used=124.35GiB System, RAID10: total=128.00MiB, used=48.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID10: total=112.00GiB, used=1.38GiB What's the problem here? You no longer have any RAID1 chunks, so it's not showing them. Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- IMPROVE YOUR ORGANISMS!! -- Subject line of spam email --- signature.asc Description: Digital signature
Re: btrfs fi df won't show total=
On Monday 2012-07-09 21:25, Hugo Mills wrote: On Mon, Jul 09, 2012 at 09:14:03PM +0200, Jan Engelhardt wrote: On openSUSE_12.1 with Btrfs v0.19+20120406, the following can be observed: after a change of the profiles, total=,used= is no longer shown: 20:49 mmsrv1:~ # btrfs fi df /top.srv/ Data, RAID10: total=152.00GiB, used=121.07GiB System, RAID1: total=40.00MiB, used=44.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID1: total=112.00GiB, used=1.30GiB Metadata: total=8.00MiB, used=0.00 [...] 21:10 mmsrv1:~ # btrfs fi df /top.srv/ Data, RAID10: total=156.00GiB, used=124.35GiB System, RAID10: total=128.00MiB, used=48.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID10: total=112.00GiB, used=1.38GiB What's the problem here? You no longer have any RAID1 chunks, so it's not showing them. Rather tha a 4-line output, I would have expected this 6-line output that I would also get when mkfs'ing a new fresh btrfs volume with raid10 from the start: Data, RAID10: total=156.00GiB, used=124.35GiB Data: total=foo, used=bar System, RAID10: total=128.00MiB, used=48.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID10: total=112.00GiB, used=1.38GiB Metadata: total=foo, used=bar -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: btrfs fi df won't show total=
On Mon, Jul 09, 2012 at 10:06:24PM +0200, Jan Engelhardt wrote: On Monday 2012-07-09 21:25, Hugo Mills wrote: On Mon, Jul 09, 2012 at 09:14:03PM +0200, Jan Engelhardt wrote: On openSUSE_12.1 with Btrfs v0.19+20120406, the following can be observed: after a change of the profiles, total=,used= is no longer shown: 20:49 mmsrv1:~ # btrfs fi df /top.srv/ Data, RAID10: total=152.00GiB, used=121.07GiB System, RAID1: total=40.00MiB, used=44.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID1: total=112.00GiB, used=1.30GiB Metadata: total=8.00MiB, used=0.00 [...] 21:10 mmsrv1:~ # btrfs fi df /top.srv/ Data, RAID10: total=156.00GiB, used=124.35GiB System, RAID10: total=128.00MiB, used=48.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID10: total=112.00GiB, used=1.38GiB What's the problem here? You no longer have any RAID1 chunks, so it's not showing them. Rather tha a 4-line output, I would have expected this 6-line output that I would also get when mkfs'ing a new fresh btrfs volume with raid10 from the start: Data, RAID10: total=156.00GiB, used=124.35GiB Data: total=foo, used=bar System, RAID10: total=128.00MiB, used=48.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID10: total=112.00GiB, used=1.38GiB Metadata: total=foo, used=bar The lines without the RAID marker are there as a result of the way that mkfs works -- it creates stub chunks which are never used, and then upgrades to the required RAID level immediately afterwards. The balance (any balance, not just a conversion) processes these chunks as well as all the other chunks in the FS, and rewrites all of the data in them (all 0 bytes of it) somewhere else, removing the originals. Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- Well, you don't get to be a kernel hacker simply by looking --- good in Speedos. -- Rusty Russell signature.asc Description: Digital signature
Re: btrfs fi df won't show total=
On Mon, Jul 09, 2012 at 10:06:24PM +0200, Jan Engelhardt wrote: On Monday 2012-07-09 21:25, Hugo Mills wrote: On Mon, Jul 09, 2012 at 09:14:03PM +0200, Jan Engelhardt wrote: On openSUSE_12.1 with Btrfs v0.19+20120406, the following can be observed: after a change of the profiles, total=,used= is no longer shown: 20:49 mmsrv1:~ # btrfs fi df /top.srv/ Data, RAID10: total=152.00GiB, used=121.07GiB System, RAID1: total=40.00MiB, used=44.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID1: total=112.00GiB, used=1.30GiB Metadata: total=8.00MiB, used=0.00 [...] 21:10 mmsrv1:~ # btrfs fi df /top.srv/ Data, RAID10: total=156.00GiB, used=124.35GiB System, RAID10: total=128.00MiB, used=48.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID10: total=112.00GiB, used=1.38GiB What's the problem here? You no longer have any RAID1 chunks, so it's not showing them. Rather tha a 4-line output, I would have expected this 6-line output that I would also get when mkfs'ing a new fresh btrfs volume with raid10 from the start: Data, RAID10: total=156.00GiB, used=124.35GiB Data: total=foo, used=bar System, RAID10: total=128.00MiB, used=48.00KiB System: total=4.00MiB, used=0.00 Metadata, RAID10: total=112.00GiB, used=1.38GiB Metadata: total=foo, used=bar mkfs creates those non-raid chunks for a pretty stupid reason, they really shouldn't be there if you create a raid10 fs. Balance does the right thing and removes them. Fixing this along with another mkfs annoyance related to this one is on my TODO list. Thanks, Ilya -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
