From: kjansen387 <kjansen387@gmail.com>
To: linux-btrfs@vger.kernel.org
Subject: Re: btrfs raid1 balance slow
Date: Tue, 21 Jan 2020 10:51:48 +0100 [thread overview]
Message-ID: <176ec92f-56ba-4c8a-bcce-115c69fb7eeb@gmail.com> (raw)
In-Reply-To: <6bc329d9-6dc5-a4bc-e7c4-eccd377823eb@gmail.com>
Forgot to mention; I'm running kernel 5.4.10-200.fc31.x86_64 .
Op 20-Jan-20 om 23:08 schreef kjansen387:
> Hello,
>
> I had a btrfs raid1 with 2 4TB SATA 5400RPM disks . Regular disk I/O is
> about 2MB/sec per drive, ~40IOPS, mostly write. I had ~150GB free and
> added one 2 TB disk and started the balance:
>
> btrfs device add -f /dev/sdb /export
> btrfs filesystem balance /export
>
> It's now running for 24 hours, 70% remaining:
>
> # btrfs balance status -v /export
> Balance on '/export' is running
> 1057 out of about 3561 chunks balanced (1058 considered), 70% left
> Dumping filters: flags 0x7, state 0x1, force is off
> DATA (flags 0x0): balancing
> METADATA (flags 0x0): balancing
> SYSTEM (flags 0x0): balancing
>
> I have searched for similar cases, but, I do not have quotas enabled, I
> do not have compression enabled, and my CPU supports sse4_2 . CPU
> (i7-8700K) is doing fine, 80% idle (average over all threads).
>
> Is this normal ? I have to repeat this process 2 times (adding more 2TB
> disks), any way I can make it faster ?
>
> Thanks!
> Klaas
>
next prev parent reply other threads:[~2020-01-21 9:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-20 22:08 btrfs raid1 balance slow kjansen387
2020-01-20 22:13 ` Hugo Mills
2020-01-20 23:59 ` Qu Wenruo
2020-01-21 9:51 ` kjansen387 [this message]
2020-01-22 8:18 ` kjansen387
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