From: Christoph Anton Mitterer <calestyo@scientia.net>
To: Roman Mamedov <rm@romanrm.net>, Adam Borowski <kilobyte@angband.pl>
Cc: "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: zerofree btrfs support?
Date: Sat, 10 Mar 2018 19:39:53 +0100 [thread overview]
Message-ID: <1520707193.24363.39.camel@scientia.net> (raw)
In-Reply-To: <20180310233127.0dfa7823@natsu>
On Sat, 2018-03-10 at 23:31 +0500, Roman Mamedov wrote:
> QCOW2 would add a second layer of COW
> on top of
> Btrfs, which sounds like a nightmare.
I've just seen there is even a nocow option "specifically" for btrfs...
it seems however that it doesn't disable the CoW of qcow, but rather
that of btrfs... (thus silently also the checksumming).
Does plain qcow2 really CoW on every write? I've always assumed it
would only CoW when one makes snapshots or so...
Cheers,
Chris.
next prev parent reply other threads:[~2018-03-10 18:39 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-10 2:55 zerofree btrfs support? Christoph Anton Mitterer
2018-03-10 8:16 ` Adam Borowski
2018-03-10 14:19 ` Christoph Anton Mitterer
2018-03-10 14:37 ` Roman Mamedov
2018-03-10 15:50 ` Adam Borowski
2018-03-10 16:58 ` Christoph Anton Mitterer
2018-03-10 18:31 ` Roman Mamedov
2018-03-10 18:39 ` Christoph Anton Mitterer [this message]
2018-03-10 16:55 ` Christoph Anton Mitterer
2018-03-14 19:38 ` David Sterba
2018-03-15 2:54 ` Christoph Anton Mitterer
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