From: Phillip Susi <psusi@ubuntu.com>
To: Josef Bacik <jbacik@fb.com>, Daniele Testa <daniele.testa@gmail.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: btrfs is using 25% more disk than it should
Date: Fri, 19 Dec 2014 16:53:36 -0500 [thread overview]
Message-ID: <54949E60.7010201@ubuntu.com> (raw)
In-Reply-To: <5494955C.3020603@fb.com>
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On 12/19/2014 4:15 PM, Josef Bacik wrote:
> Please God don't turn off of checksums. Checksums are tracked in
> metadata anyway, they won't show up in the data accounting. Our
> csums are 8 bytes per block, so basic math says you are going to
> max out at 604 megabytes for that big of a file.
Yes, and it is exactly that metadata space he is complaining about.
So if you don't want to use up all of that space ( and have no use for
the checksums ), then you turn them off.
> Please people try to only take advice from people who know what
> they are talking about. So unless it's from somebody who has
> commits in btrfs/btrfs-progs take their feedback with a grain of
> salt. Thanks,
Well that is rather arrogant and rude. For that matter, I *do* have
commits in btrfs-progs.
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next prev parent reply other threads:[~2014-12-19 21:53 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-18 14:59 btrfs is using 25% more disk than it should Daniele Testa
2014-12-19 18:53 ` Phillip Susi
2014-12-19 19:59 ` Daniele Testa
2014-12-19 20:35 ` Phillip Susi
2014-12-19 21:15 ` Josef Bacik
2014-12-19 21:53 ` Phillip Susi [this message]
2014-12-19 22:06 ` Josef Bacik
2014-12-20 1:33 ` Duncan
2014-12-19 21:10 ` Josef Bacik
2014-12-19 21:17 ` Josef Bacik
2014-12-20 1:38 ` Duncan
2014-12-20 5:52 ` Zygo Blaxell
2014-12-20 6:18 ` Daniele Testa
2014-12-20 6:59 ` Duncan
2014-12-20 11:02 ` Josef Bacik
2014-12-20 11:28 ` Josef Bacik
2014-12-23 21:51 ` Zygo Blaxell
2014-12-20 9:15 ` Daniele Testa
2014-12-20 11:23 ` Robert White
2014-12-20 11:39 ` Josef Bacik
2014-12-21 1:40 ` Robert White
2014-12-21 3:04 ` Robert White
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