Originally posted by kebabbert
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Testing Out The Btrfs Mount Options On Linux 3.2
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Originally posted by stan View PostOK, so let's talk reliability. As it stands, BTRFS is much more prone to corruption and gradual degradation of speed and even available free spance than EXT4. Just look at all the reports of people saying BTRFS becomes unusable after a a few days of running. The fact is that for the vast majority of desktop users, BTRFS still has no advantage over EXT4.
Heck, I can make an unsafe fast solution that no one can trust. The difficulty is making it stable and safe - and yes, that will become a bit slower but some might consider that worth the price. If what Stan says is true, then everybody should prefer EXT4 over BTRFS?
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... However
(@kebabbert)
... Because btrfs is far too immature to actually live up to the its potential reliability benefits.
Sure, I'd love to have ZFS-like-features on Linux, but for now, ext4 is more reliable than btrfs.oVirt-HV1: Intel S2600C0, 2xE5-2658V2, 128GB, 8x2TB, 4x480GB SSD, GTX1080 (to-VM), Dell U3219Q, U2415, U2412M.
oVirt-HV2: Intel S2400GP2, 2xE5-2448L, 120GB, 8x2TB, 4x480GB SSD, GTX730 (to-VM).
oVirt-HV3: Gigabyte B85M-HD3, E3-1245V3, 32GB, 4x1TB, 2x480GB SSD, GTX980 (to-VM).
Devel-2: Asus H110M-K, i5-6500, 16GB, 3x1TB + 128GB-SSD, F33.
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not sure
I'm not sure the 'inode_cache' option has been tested the right way, and the article doesn't describe in detail how this was done.
This option does some FS modifications on first boot, so in order to test, it is probably best to boot once with this option in effect, do some work, reboot, and only then run the tests.
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Originally posted by DanL View PostReliability should be a given for a filesystem.
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Well, I saw the results and I've a weird question to ask about them: Why using compression gives so much better performance than not using compression at all? Shouldn't it be the opposite? It seems something very wrong is on the results that use BTRFS compression, btw...
Also, these results only confirm why at the moment ext4 is the defacto file system for Linux consumer users. But I hope BTRFS will get better over time...
Cheers
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Originally posted by rrohbeckI've been using Btrfs heavily since October, with a 4x 3TB RAID 10. Frequent creation/snapshotting/deletion of subvolumes for sandboxes that often go up to 140GB and a bunch of VMs (you want chattr -c and -C for VMs, otherwise they're slow.) I also had a few crashes and power failures. Oh and the whole thing runs on top of Flashcache.
Zero problems.
I've also been using btrfs roughly since October for my main /home/ partition on my (frequently used) laptop. Never had a problem with the FS, and I've managed to run the laptop out of battery a couple of times, although I'm not using any of it's features yet.
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@Kamikaze and rrohbeck:
I'm not trying to mock your personal experience, far from it.
But please keep in mind that when it comes to file system corruption, "WORKS-FOR-ME" reports carry *far* less weight than corruption reports - even if only 1/1000 suffers from a catastrophic report. (And by looking at the Fedora bugzilla, btrfs has yet to reach 1/1000 level)
- GilboaoVirt-HV1: Intel S2600C0, 2xE5-2658V2, 128GB, 8x2TB, 4x480GB SSD, GTX1080 (to-VM), Dell U3219Q, U2415, U2412M.
oVirt-HV2: Intel S2400GP2, 2xE5-2448L, 120GB, 8x2TB, 4x480GB SSD, GTX730 (to-VM).
oVirt-HV3: Gigabyte B85M-HD3, E3-1245V3, 32GB, 4x1TB, 2x480GB SSD, GTX980 (to-VM).
Devel-2: Asus H110M-K, i5-6500, 16GB, 3x1TB + 128GB-SSD, F33.
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Originally posted by gilboa View Post@Kamikaze and rrohbeck:
I'm not trying to mock your personal experience, far from it.
But please keep in mind that when it comes to file system corruption, "WORKS-FOR-ME" reports carry *far* less weight than corruption reports - even if only 1/1000 suffers from a catastrophic report. (And by looking at the Fedora bugzilla, btrfs has yet to reach 1/1000 level)
- Gilboa
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Originally posted by gilboa View Post@Kamikaze and rrohbeck:
I'm not trying to mock your personal experience, far from it.
But please keep in mind that when it comes to file system corruption, "WORKS-FOR-ME" reports carry *far* less weight than corruption reports - even if only 1/1000 suffers from a catastrophic report. (And by looking at the Fedora bugzilla, btrfs has yet to reach 1/1000 level)
- Gilboa
I'm hoping this will change in a year or two though; once the btrfs fsck tools are released and stable, and a major distro is comfortable enabling the FS by default (and the bug reports have been addressed).
BTW - regarding the oracle front, anyone know if they are still considering allowing btrfs to be set as the root partition on their next release considering the btrfs tools still aren't out of their experimental "do not use" state?
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