From: Martin Steigerwald <martin@lichtvoll.de>
To: linux-btrfs@vger.kernel.org
Subject: Re: Small fs
Date: Sun, 11 Sep 2016 21:13:28 +0200 [thread overview]
Message-ID: <14309857.N6fGUh6qoJ@merkaba> (raw)
In-Reply-To: <pan$238e8$d4dacca2$71255eb4$9f2e5ec1@cox.net>
Am Sonntag, 11. September 2016, 16:44:23 CEST schrieb Duncan:
> * Metadata, and thus mixed-bg, defaults to DUP mode on a single-device
> filesystem (except on ssd where I actually still use it myself, and
> recommend it except for ssds that do firmware dedupe). In mixed-mode
> this means two copies of data as well, which halves the usable space.
>
> IOW, when using mixed-mode, which is recommended under a gig, and dup
> replication which is then the single-device default, effective usable
> space is **HALVED**, so 256 MiB btrfs size becomes 128 MiB usable. (!!)
I don´t get this part. That is just *metadata* being duplicated, not the
actual *data* inside the files. Or am I missing something here?
--
Martin
next prev parent reply other threads:[~2016-09-11 19:13 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-11 15:27 Small fs Imran Geriskovan
2016-09-11 15:32 ` Martin Steigerwald
2016-09-11 16:44 ` Duncan
2016-09-11 18:56 ` Imran Geriskovan
2016-09-11 19:21 ` Martin Steigerwald
2016-09-12 12:41 ` Austin S. Hemmelgarn
2016-09-12 14:09 ` Henk Slager
2016-09-12 14:12 ` Austin S. Hemmelgarn
2016-09-12 14:51 ` Chris Murphy
2016-09-12 14:56 ` Austin S. Hemmelgarn
2016-09-12 3:33 ` Duncan
2016-09-12 14:11 ` Imran Geriskovan
2016-09-12 17:43 ` Imran Geriskovan
2016-09-12 18:46 ` Imran Geriskovan
2016-09-12 18:55 ` Austin S. Hemmelgarn
2016-09-12 21:32 ` Mike Fleetwood
2016-09-11 19:13 ` Martin Steigerwald [this message]
2016-09-11 19:46 ` Hugo Mills
2016-09-11 19:51 ` Martin Steigerwald
2016-09-12 12:45 ` Austin S. Hemmelgarn
2016-09-11 20:33 ` Chris Murphy
2016-09-12 2:00 ` Duncan
2016-09-12 3:03 ` Chris Murphy
2016-09-12 4:54 ` Duncan
2016-09-12 14:48 ` Chris Murphy
2016-09-13 4:25 ` Duncan
2016-09-12 12:54 ` Imran Geriskovan
2016-09-12 13:01 ` Austin S. Hemmelgarn
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