From: Stephane Chazelas <stephane_chazelas@yahoo.fr>
To: helmut@hullen.de
Cc: linux-btrfs@vger.kernel.org
Subject: Re: btrfs balancing start - and stop?
Date: Wed, 6 Apr 2011 12:43:50 +0100 [thread overview]
Message-ID: <chaz20110406114350.GA20568@seebyte.com> (raw)
In-Reply-To: <20110404190753.GC9371@yahoo.fr>
2011-04-04 20:07:54 +0100, Stephane Chazelas:
[...]
> > > 4.7 more days to go. And I reckon it will have written about 9
> > > TB to disk by that time (which is the total size of the volume,
> > > though only 3.8TB are occupied).
> >
> > Yes - that's the pessimistic estimation. As Hugo has explained it can
> > finish faster - just look to the data tomorrow again.
> [...]
>
> That may be an optimistic estimation actually, as there hasn't
> been much progress in the last 34 hours:
[...]
The rate is going down. It's now down to about 14kB/s
[658654.295752] btrfs: relocating block group 3919858106368 flags 20
[671932.913235] btrfs: relocating block group 3919589670912 flags 20
[686189.296126] btrfs: relocating block group 3919321235456 flags 20
[701511.523990] btrfs: relocating block group 3919052800000 flags 20
[718591.316339] btrfs: relocating block group 3918784364544 flags 20
[725567.081031] btrfs: relocating block group 3918515929088 flags 20
[744415.011581] btrfs: relocating block group 3918247493632 flags 20
[762365.021458] btrfs: relocating block group 3917979058176 flags 20
[780504.726067] btrfs: relocating block group 3917710622720 flags 20
Even though it is reading and writing to disk at a much higher
rate. Here stats every second:
--dsk/sda-----dsk/sdb-----dsk/sdc--
read writ: read writ: read writ
0 0 : 540k 0 : 12k 0
0 0 : 704k 0 : 20k 0
0 0 :1068k 0 : 24k 0
0 0 : 968k 0 : 0 0
0 0 : 932k 0 :4096B 0
0 0 : 832k 880k: 152k 1320k
60k 4096B: 880k 140k: 0 28M
68k 0 : 308k 0 :4096B 9240k
0 48k: 0 0 : 0 7852k
0 0 : 576k 6192k:4096B 26M
0 0 : 100k 18M: 0 0
0 0 : 28k 10M: 0 0
0 0 : 0 7020k: 0 0
0 0 : 52k 13M: 0 0
0 12k: 528k 17M: 0 12k
0 0 : 884k 0 :8192B 0
0 0 :1068k 0 : 20k 0
0 0 : 660k 0 : 0 0
0 40k: 776k 0 :4096B 0
0 0 : 576k 0 : 0 0
0 0 : 596k 0 :8192B 0
1096k 28k: 664k 0 :4096B 0
0 0 : 660k 0 : 0 0
0 0 : 592k 0 :8192B 0
At this rate, the balancing would be over in about 8 years.
Since the start of the balance:
Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn
sda 10.04 1.56 1.57 1228286 1237359
sdc 396.24 1.77 3.95 1397015 3115057
sdb 421.17 1.87 3.95 1473759 3115093
I think that's the end of my attempt to transfer that FS to
another machine (see other thread). I'll have to ditch that copy
and try again from scratch with another approach.
Before I do that, is there anything I can do to help investigate
the problem?
regards,
Stephane
next prev parent reply other threads:[~2011-04-06 11:43 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-01 11:14 btrfs balancing start - and stop? Struan Bartlett
2011-04-01 11:59 ` Hugo Mills
2011-04-05 16:06 ` Struan Bartlett
2011-04-01 12:12 ` Helmut Hullen
2011-04-01 13:22 ` Konstantinos Skarlatos
2011-04-01 13:36 ` Helmut Hullen
2011-04-01 13:52 ` Hugo Mills
[not found] ` <20110401133736.GB2984@carfax.org.uk>
2011-04-01 14:24 ` Konstantinos Skarlatos
2011-04-01 18:33 ` Stephane Chazelas
2011-04-01 19:26 ` Helmut Hullen
2011-04-03 18:53 ` Stephane Chazelas
2011-04-03 19:35 ` Helmut Hullen
2011-04-04 19:07 ` Stephane Chazelas
2011-04-06 11:43 ` Stephane Chazelas [this message]
2011-04-11 8:42 ` Stephane Chazelas
2011-04-11 9:14 ` Helmut Hullen
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