All of lore.kernel.org
 help / color / mirror / Atom feed
From: pg@btrfs.list.sabi.co.UK (Peter Grandi)
To: Btrfs BTRFS <linux-btrfs@vger.kernel.org>
Subject: Re: Exactly what is wrong with RAID5/6
Date: Wed, 21 Jun 2017 08:31:47 +0100	[thread overview]
Message-ID: <22858.8419.929641.516486@tree.ty.sabi.co.uk> (raw)
In-Reply-To: <a88f7896-5693-ad90-383e-a24c61110e8a@rqc.ru>

> [ ... ] This will make some filesystems mostly RAID1, negating
> all space savings of RAID5, won't it? [ ... ]

RAID5/RAID6/... don't merely save space, more precisely they
trade lower resilience and a more anisotropic and smaller
performance envelope to gain lower redundancy (= save space).

  reply	other threads:[~2017-06-21  7:31 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-20 22:57 Exactly what is wrong with RAID5/6 waxhead
2017-06-20 23:25 ` Hugo Mills
2017-06-21  3:48   ` Chris Murphy
2017-06-21  6:51     ` Marat Khalili
2017-06-21  7:31       ` Peter Grandi [this message]
2017-06-21 17:13       ` Andrei Borzenkov
2017-06-21 18:43       ` Chris Murphy
2017-06-21  8:45 ` Qu Wenruo
2017-06-21 12:43   ` Christoph Anton Mitterer
2017-06-21 13:41     ` Austin S. Hemmelgarn
2017-06-21 17:20       ` Andrei Borzenkov
2017-06-21 17:30         ` Austin S. Hemmelgarn
2017-06-21 17:03   ` Goffredo Baroncelli
2017-06-22  2:05     ` Qu Wenruo
2017-06-21 18:24   ` Chris Murphy
2017-06-21 20:12     ` Goffredo Baroncelli
2017-06-21 23:19       ` Chris Murphy
2017-06-22  2:12     ` Qu Wenruo
2017-06-22  2:43       ` Chris Murphy
2017-06-22  3:55         ` Qu Wenruo
2017-06-22  5:15       ` Goffredo Baroncelli
2017-06-23 17:25 ` Michał Sokołowski
2017-06-23 18:45   ` Austin S. Hemmelgarn

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=22858.8419.929641.516486@tree.ty.sabi.co.uk \
    --to=pg@btrfs.list.sabi.co.uk \
    --cc=linux-btrfs@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.