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From: Bernhard Schmidt <berni@birkenwald.de>
To: Chris Mason <chris.mason@oracle.com>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: abysmal performance
Date: Tue, 03 May 2011 15:03:19 +0200	[thread overview]
Message-ID: <4DBFFD17.8080702@birkenwald.de> (raw)
In-Reply-To: <1304427015-sup-4772@think>

Hi,

> Ok, looks like we could be doing a little better job when compression is
> on to build out a bigger extent.  This shouldn't be causing trouble on
> an ssd at all but on your rotating disk it'll be slightly slower.
> 
> Still most of these extents are somewhat close together, this is roughly
> what mount -o ssd (which is enabled automatically when we detect a
> non-rotating drive) would try for.
> 
> The problematic files are going to have thousands of extents, this file
> should be fine.

Thanks, I'll check on my system with rotating disks at home when I get back.

Bernhard

  reply	other threads:[~2011-05-03 13:03 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-04-29 14:46 abysmal performance John Wyzer
2011-04-29 15:01 ` Chris Mason
2011-04-30 17:33   ` Mitch Harder
2011-04-30 20:40     ` John Wyzer
2011-04-30 22:16       ` Mitch Harder
2011-04-30 22:33         ` John Wyzer
2011-05-03 11:05           ` Chris Mason
2011-05-03 11:06           ` Chris Mason
2011-04-30 23:55     ` Peter Stuge
2011-05-03 10:33       ` Bernhard Schmidt
2011-05-03 11:00         ` cwillu
2011-05-03 11:26           ` Bernhard Schmidt
2011-05-03 11:08         ` Chris Mason
2011-05-03 11:30           ` Bernhard Schmidt
2011-05-03 11:36             ` Chris Mason
2011-05-03 11:43               ` Bernhard Schmidt
2011-05-03 12:52                 ` Chris Mason
2011-05-03 13:03                   ` Bernhard Schmidt [this message]
2011-05-03 13:41                     ` Mitch Harder
2011-05-03 14:41                   ` Daniel J Blueman
2011-05-03 15:42                     ` Mitch Harder
2011-05-03 16:51                       ` Chris Mason
2011-05-03 14:54             ` Daniel J Blueman
2011-05-03 15:10               ` Bernhard Schmidt
     [not found]   ` <1304100271-sup-4177@localhost>
     [not found]     ` <1304100862-sup-1493@think>
     [not found]       ` <1304107977-sup-3815@localhost>
     [not found]         ` <1304110058-sup-7292@think>
     [not found]           ` <1304146193-sup-2200@localhost>
2011-04-30 20:51             ` John Wyzer
  -- strict thread matches above, loose matches on Subject: below --
2011-06-20 21:51 Abysmal Performance Henning Rohlfs
2011-06-21  0:12 ` Josef Bacik
2011-06-21  7:10   ` Henning Rohlfs
2011-06-21  8:00 ` Sander
2011-06-21  9:26   ` Henning Rohlfs
2011-06-21 15:18     ` Josef Bacik
2011-06-21 16:55       ` Henning Rohlfs
2011-06-21 15:24 ` Calvin Walton
2011-06-22 14:15   ` Henning Rohlfs
2011-06-22 15:39     ` Josef Bacik
2011-06-22 15:57       ` Calvin Walton
2011-06-22 15:58         ` Josef Bacik

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