I completely agree, the whole wiki status is simply *FRUSTRATING*.
Niccolò Belli
On mercoledì 30 novembre 2016 14:12:36 CET, Wilson Meier wrote:
Am 30/11/16 um 11:41 schrieb Duncan:
Wilson Meier posted on Wed, 30 Nov 2016 09:35:36 +0100 as excerpted:
...
Hi Duncan,
i understand your arguments but cannot fully agree.
First of all, i'm not sticking with old stale versions of whatever as i
try to keep my system up2date.
My kernel is 4.8.4 (Gentoo) and btrfs-progs is 4.8.4.
That being said, i'm quite aware of the heavy development status of
btrfs but pointing the finger on the users saying that they don't fully
understand the status of btrfs without giving the information on the
wiki is in my opinion not the right way. Heavy development doesn't mean
that features marked as ok are "not" or "mostly" ok in the context of
overall btrfs stability.
There is no indication on the wiki that raid1 or every other raid
(except for raid5/6) suffers from the problems stated in this thread.
If there are know problems then the stability matrix should point them
out or link to a corresponding wiki entry otherwise one has to assume
that the features marked as "ok" are in fact "ok".
And yes, the overall btrfs stability should be put on the wiki.
Just to give you a quick overview of my history with btrfs.
I migrated away from MD Raid and ext4 to btrfs raid6 because of its CoW
and checksum features at a time as raid6 was not considered fully stable
but also not as badly broken.
After a few months i had a disk failure and the raid could not recover.
I looked at the wiki an the mailing list and noticed that raid6 has been
marked as badly broken :(
I was quite happy to have a backup. So i asked on the btrfs IRC channel
(the wiki had no relevant information) if raid10 is usable or suffers
from the same problems. The summary was "Yes it is usable and has no
known problems". So i migrated to raid10. Now i know that raid10 (marked
as ok) has also problems with 2 disk failures in different stripes and
can in fact lead to data loss.
I thought, hmm ok, i'll split my data and use raid1 (marked as ok). And
again the mailing list states that raid1 has also problems in case of
recovery.
It is really disappointing to not have this information in the wiki
itself. This would have saved me, and i'm quite sure others too, a lot
of time.
Sorry for being a bit frustrated.
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