From: Joe Thornber <thornber@redhat.com>
To: "Amir G." <amir73il@users.sourceforge.net>
Cc: sandeen@redhat.com, tytso@mit.edu, snitzer@redhat.com,
Yongqiang Yang <xiaoqiangnk@gmail.com>,
lvm-devel@redhat.com, Lukas Czerner <lczerner@redhat.com>,
linux-ext4@vger.kernel.org
Subject: Re: [PATCH v1 00/30] Ext4 snapshots
Date: Mon, 13 Jun 2011 14:50:07 +0100 [thread overview]
Message-ID: <20110613135007.GC3049@ubuntu> (raw)
In-Reply-To: <BANLkTin0Wg9LMjRtHQhyu8rBwU7dQLNW-w@mail.gmail.com>
On Mon, Jun 13, 2011 at 04:26:16PM +0300, Amir G. wrote:
> with ext4, snapshots reads may cause extra seeks, but main fs will
> stay optimized for reads.
> with thinp and multisnap, there is no optimization for read from one
> specific target, but I admit that can change in the future when auto defrag
> heuristics are applies to multisnap.
I'm going to keep things symmetrical. A lot of use cases involve
pointing at an arbitrary snapshot and saying "that's now my master".
This is connected to why I support arbitrary depth of recursive
snapshots too.
- Joe
--
lvm-devel mailing list
lvm-devel@redhat.com
https://www.redhat.com/mailman/listinfo/lvm-devel
WARNING: multiple messages have this Message-ID (diff)
From: Joe Thornber <thornber@redhat.com>
To: lvm-devel@redhat.com
Subject: [PATCH v1 00/30] Ext4 snapshots
Date: Mon, 13 Jun 2011 14:50:07 +0100 [thread overview]
Message-ID: <20110613135007.GC3049@ubuntu> (raw)
In-Reply-To: <BANLkTin0Wg9LMjRtHQhyu8rBwU7dQLNW-w@mail.gmail.com>
On Mon, Jun 13, 2011 at 04:26:16PM +0300, Amir G. wrote:
> with ext4, snapshots reads may cause extra seeks, but main fs will
> stay optimized for reads.
> with thinp and multisnap, there is no optimization for read from one
> specific target, but I admit that can change in the future when auto defrag
> heuristics are applies to multisnap.
I'm going to keep things symmetrical. A lot of use cases involve
pointing at an arbitrary snapshot and saying "that's now my master".
This is connected to why I support arbitrary depth of recursive
snapshots too.
- Joe
next prev parent reply other threads:[~2011-06-13 13:50 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-07 15:07 [PATCH v1 00/30] Ext4 snapshots amir73il
2011-06-07 15:07 ` [PATCH v1 01/36] ext4: EXT4 snapshots (Experimental) amir73il
2011-06-07 15:07 ` [PATCH v1 02/36] ext4: snapshot debugging support amir73il
2011-06-07 15:07 ` [PATCH v1 03/36] ext4: snapshot hooks - inside JBD hooks amir73il
2011-06-07 15:07 ` [PATCH v1 04/36] ext4: snapshot hooks - block bitmap access amir73il
2011-06-07 15:07 ` [PATCH v1 05/36] ext4: snapshot hooks - delete blocks amir73il
2011-06-07 15:07 ` [PATCH v1 06/36] ext4: snapshot hooks - move data blocks amir73il
2011-06-07 15:07 ` [PATCH v1 07/36] ext4: snapshot hooks - direct I/O amir73il
2011-06-07 15:07 ` [PATCH v1 08/36] ext4: snapshot hooks - move extent file data blocks amir73il
2011-06-07 15:07 ` [PATCH v1 09/36] ext4: snapshot file amir73il
2011-06-07 15:07 ` [PATCH v1 10/36] ext4: snapshot file - read through to block device amir73il
2011-06-07 15:07 ` [PATCH v1 11/36] ext4: snapshot file - permissions amir73il
2011-06-07 15:07 ` [PATCH v1 12/36] ext4: snapshot file - store on disk amir73il
2011-06-07 15:07 ` [PATCH v1 13/36] ext4: snapshot file - increase maximum file size limit to 16TB amir73il
2011-06-07 15:07 ` [PATCH v1 14/36] ext4: snapshot block operations amir73il
2011-06-07 15:07 ` [PATCH v1 15/36] ext4: snapshot block operation - copy blocks to snapshot amir73il
2011-06-07 15:07 ` [PATCH v1 16/36] ext4: snapshot block operation - move " amir73il
2011-06-07 15:07 ` [PATCH v1 17/36] ext4: snapshot block operation - copy block bitmap " amir73il
2011-06-07 15:07 ` [PATCH v1 18/36] ext4: snapshot control amir73il
2011-06-07 15:07 ` [PATCH v1 19/36] ext4: snapshot control - init new snapshot amir73il
2011-06-07 15:07 ` [PATCH v1 20/36] ext4: snapshot control - fix " amir73il
2011-06-07 15:07 ` [PATCH v1 21/36] ext4: snapshot control - reserve disk space for snapshot amir73il
2011-06-07 15:07 ` [PATCH v1 22/36] ext4: snapshot journaled - increase transaction credits amir73il
2011-06-07 15:07 ` [PATCH v1 23/36] ext4: snapshot journaled - implement journal_release_buffer() amir73il
2011-06-07 15:07 ` [PATCH v1 24/36] ext4: snapshot journaled - bypass to save credits amir73il
2011-06-07 15:07 ` [PATCH v1 25/36] ext4: snapshot journaled - cache last COW tid in journal_head amir73il
2011-06-07 15:07 ` [PATCH v1 26/36] ext4: snapshot journaled - trace COW/buffer credits amir73il
2011-06-07 15:07 ` [PATCH v1 27/36] ext4: snapshot list support amir73il
2011-06-07 15:07 ` [PATCH v1 28/36] ext4: snapshot list - read through to previous snapshot amir73il
2011-06-07 15:07 ` [PATCH v1 29/36] ext4: snapshot race conditions - concurrent COW bitmap operations amir73il
2011-06-07 15:07 ` [PATCH v1 30/36] ext4: snapshot race conditions - concurrent COW operations amir73il
2011-06-07 15:07 ` [PATCH v1 31/36] ext4: snapshot race conditions - tracked reads amir73il
2011-06-07 15:07 ` [PATCH v1 32/36] ext4: snapshot exclude - the exclude bitmap amir73il
2011-06-07 15:08 ` [PATCH v1 33/36] ext4: snapshot cleanup amir73il
2011-06-07 15:08 ` [PATCH v1 34/36] ext4: snapshot cleanup - shrink deleted snapshots amir73il
2011-06-07 15:08 ` [PATCH v1 35/36] ext4: snapshot cleanup - merge shrunk snapshots amir73il
2011-06-07 15:08 ` [PATCH v1 36/36] ext4: snapshot rocompat - enable rw mount amir73il
2011-06-07 15:56 ` [PATCH v1 00/30] Ext4 snapshots Lukas Czerner
2011-06-07 16:31 ` Amir G.
2011-06-07 16:31 ` Amir G.
2011-06-08 10:09 ` Lukas Czerner
2011-06-08 14:04 ` Amir G.
2011-06-08 14:41 ` Eric Sandeen
2011-06-08 15:01 ` Amir G.
2011-06-08 15:22 ` Eric Sandeen
2011-06-08 15:33 ` Amir G.
2011-06-08 15:33 ` Amir G.
2011-06-08 15:38 ` Lukas Czerner
2011-06-08 15:59 ` Amir G.
2011-06-08 16:19 ` Mike Snitzer
2011-06-09 1:59 ` Yongqiang Yang
2011-06-09 3:18 ` Amir G.
2011-06-09 3:18 ` Amir G.
2011-06-09 3:51 ` Yongqiang Yang
2011-06-09 3:51 ` Yongqiang Yang
2011-06-09 6:50 ` Lukas Czerner
2011-06-09 7:57 ` Amir G.
2011-06-09 7:57 ` Amir G.
2011-06-09 8:13 ` david
2011-06-09 10:06 ` Amir G.
2011-06-09 10:06 ` Amir G.
2011-06-09 10:17 ` Lukas Czerner
2011-06-09 8:46 ` Lukas Czerner
2011-06-09 10:54 ` Amir G.
2011-06-09 10:54 ` Amir G.
2011-06-09 12:59 ` Lukas Czerner
2011-06-10 7:06 ` Amir G.
2011-06-10 7:06 ` Amir G.
2011-06-10 9:00 ` Lukas Czerner
2011-06-10 12:02 ` Amir G.
2011-06-13 9:56 ` Amir G.
2011-06-13 10:54 ` Lukas Czerner
2011-06-13 10:54 ` Lukas Czerner
2011-06-13 12:56 ` Amir G.
2011-06-13 12:56 ` Amir G.
2011-06-13 13:11 ` Lukas Czerner
2011-06-13 13:11 ` Lukas Czerner
2011-06-13 13:26 ` Amir G.
2011-06-13 13:26 ` Amir G.
2011-06-13 13:50 ` Joe Thornber [this message]
2011-06-13 13:50 ` Joe Thornber
2011-06-10 22:51 ` Valdis.Kletnieks
2011-06-11 1:09 ` Amir G.
2011-06-11 1:09 ` Amir G.
2011-06-21 11:06 ` Amir G.
2011-06-21 15:45 ` Andreas Dilger
2011-06-22 6:38 ` Amir G.
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=20110613135007.GC3049@ubuntu \
--to=thornber@redhat.com \
--cc=amir73il@users.sourceforge.net \
--cc=lczerner@redhat.com \
--cc=linux-ext4@vger.kernel.org \
--cc=lvm-devel@redhat.com \
--cc=sandeen@redhat.com \
--cc=snitzer@redhat.com \
--cc=tytso@mit.edu \
--cc=xiaoqiangnk@gmail.com \
/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.