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From: "Trenton D. Adams" <trenton.d.adams@gmail.com>
To: Christian Kujau <lists@nerdbynature.de>
Cc: Theodore Tso <tytso@mit.edu>,
	Artem Bityutskiy <Artem.Bityutskiy@nokia.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: EXT4-ish "fixes" in UBIFS
Date: Thu, 2 Apr 2009 20:49:55 -0600	[thread overview]
Message-ID: <9b1675090904021949g301b1bbaxd1810ce82185e002@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.01.0904021938560.6162@bogon.housecafe.de>

On Thu, Apr 2, 2009 at 8:45 PM, Christian Kujau <lists@nerdbynature.de> wrote:
> On Thu, 2 Apr 2009, Theodore Tso wrote:
>> It will, but you might not like the performance....  the reason why
>> it's there is that some users might want the particular tradeoff, but
>> it probably wouldn't make a good default.
>
> Thanks for confirming this. Yes, I know about the performance impact, but
> perhaps it's feasible for some setups.
>
> Christian.
>
> PS: I was curious *how* bad the impact was and so I tried generating a
>    477 MB tarball, first on an async, then on an sync mounted partition:
>
>   /dev/md0 /mnt/md0 ext4 rw,noatime,barrier=1,data=ordered
>   $ time tar -cf /mnt/md0/test.tar /usr
>   real 1m36.615s
>
>   /dev/md0 /mnt/md0 ext4 rw,sync,noatime,barrier=1,data=ordered
>   $ time tar -cf /mnt/md0/test.tar /usr
>   real 5m23.793s

lol, yep sounds about right.  Probably much worse on my machine, given
the disk speed is around 20-23M/sec.

  reply	other threads:[~2009-04-03  2:50 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-27 12:48 EXT4-ish "fixes" in UBIFS Artem Bityutskiy
2009-03-28  1:22 ` Kyungmin Park
2009-03-29 12:31   ` Artem Bityutskiy
2009-03-29 12:54     ` Artem Bityutskiy
2009-03-29 12:26 ` replace() system call needed (was Re: EXT4-ish "fixes" in UBIFS) Pavel Machek
2009-03-29 12:42   ` Artem Bityutskiy
2009-03-29 12:50     ` Pavel Machek
2009-03-29 13:00       ` Artem Bityutskiy
2009-03-29 13:02         ` Pavel Machek
2009-03-29 13:07           ` Artem Bityutskiy
2009-03-29 13:22             ` Andreas T.Auer
2009-03-29 13:55               ` Artem Bityutskiy
2009-03-29 13:40             ` Pavel Machek
2009-03-29 13:57               ` Artem Bityutskiy
2009-03-29 14:00                 ` Pavel Machek
2009-03-30 17:19       ` Ric Wheeler
2009-03-30 22:11         ` Pavel Machek
2009-03-29 13:01     ` Andreas T.Auer
2009-03-29 13:06       ` Artem Bityutskiy
2009-03-30 15:58   ` Diego Calleja
2009-04-03  0:09 ` EXT4-ish "fixes" in UBIFS Christian Kujau
2009-04-03  0:24   ` Trenton D. Adams
2009-04-03  0:28     ` Trenton D. Adams
2009-04-03  0:38       ` Christian Kujau
2009-04-03  0:54         ` Trenton D. Adams
2009-04-03  0:54         ` Trenton D. Adams
2009-04-03  0:59           ` Trenton D. Adams
2009-04-03  1:55       ` David Rees
2009-04-03  2:05         ` Trenton D. Adams
2009-04-03  2:19           ` David Rees
2009-04-03  2:28             ` Trenton D. Adams
2009-04-03  2:58               ` David Rees
2009-04-03  3:13                 ` Trenton D. Adams
2009-04-03  3:14                   ` Trenton D. Adams
2009-04-03  5:02                 ` Theodore Tso
2009-04-03  5:15                   ` Trenton D. Adams
2009-04-03  6:30                     ` Theodore Tso
2009-04-03 18:53                       ` Chris Adams
2009-04-03 18:05                   ` David Rees
2009-04-09 20:17                   ` Pavel Machek
2009-04-03  2:26         ` Trenton D. Adams
2009-04-03  2:05   ` Theodore Tso
2009-04-03  2:45     ` Christian Kujau
2009-04-03  2:49       ` Trenton D. Adams [this message]
2009-04-03  6:53   ` Artem Bityutskiy
     [not found] <cmFiD-8uc-9@gated-at.bofh.it>
     [not found] ` <cmFss-ft-15@gated-at.bofh.it>
     [not found]   ` <cmFsu-ft-23@gated-at.bofh.it>
     [not found]     ` <cmGRt-2hq-7@gated-at.bofh.it>
     [not found]       ` <cmH1b-2K0-11@gated-at.bofh.it>
     [not found]         ` <cmHkz-3d3-5@gated-at.bofh.it>
     [not found]           ` <cmHkA-3d3-7@gated-at.bofh.it>
     [not found]             ` <cmHND-3Oz-5@gated-at.bofh.it>
     [not found]               ` <cmJPm-7hd-5@gated-at.bofh.it>

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