From: Oleg Drokin <green@namesys.com>
To: Yura Umanets <umanets@priocom.com>
Cc: Ivan Ivanov <ivandi@vamo.orbitel.bg>, reiserfs-list@namesys.com
Subject: Re: Simple preformance test
Date: Thu, 11 Apr 2002 18:27:35 +0400 [thread overview]
Message-ID: <20020411182735.A2081@namesys.com> (raw)
In-Reply-To: <3CB59D53.2060503@priocom.com>
Hello!
On Thu, Apr 11, 2002 at 05:27:31PM +0300, Yura Umanets wrote:
> Besides, I think you didn't use "smart" block alocation technics in your
> tests and the all ppl know, that performance degradates because of
> bitmap when used space grows up.
> Oleg, is this correct?
No, For this kind of test this is not true in fact.
What is done is we continuosly allocate blocks until we can
Then we free blocks.
There is no situation where we free some blocks, then allocate again and so on.
So no fragmentation, free space is not fragmented either.
So no slowdown on nearly full disk.
But there is no speedups either. Adn what we see in published numers is simply
script/benchmark error that should be ignored at least.
Bye,
Oleg
next prev parent reply other threads:[~2002-04-11 14:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-11 12:14 Simple preformance test Ivan Ivanov
2002-04-11 12:56 ` Oleg Drokin
2002-04-11 14:07 ` Ivan Ivanov
2002-04-11 14:12 ` Oleg Drokin
2002-04-11 14:28 ` Hans Reiser
2002-04-11 17:18 ` Ivan Ivanov
2002-04-11 18:26 ` Oleg Drokin
2002-04-11 17:22 ` Ivan Ivanov
2002-04-11 18:26 ` Oleg Drokin
2002-04-11 14:27 ` Yura Umanets
2002-04-11 14:27 ` Oleg Drokin [this message]
2002-04-11 17:11 ` Ivan Ivanov
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