From: "Jörn Engel" <joern@wohnheim.fh-wedel.de>
To: "Artem B. Bityuckiy" <dedekind@yandex.ru>
Cc: linux-mtd@lists.infradead.org
Subject: Re: JFFS3 superblock search
Date: Mon, 6 Jun 2005 16:00:10 +0200 [thread overview]
Message-ID: <20050606140010.GE31739@wohnheim.fh-wedel.de> (raw)
In-Reply-To: <42A45382.5080301@yandex.ru>
On Mon, 6 June 2005 17:45:38 +0400, Artem B. Bityuckiy wrote:
>
> providing the key is 16 bytes and the pointer is 8 bytes, the 4-level
> B-tree is enough for (4096/24)^4 = 170^4 ~1E8. If this isn't enough we
> may use more levels as well.
There are valid reasons to use 512 byte blocks instead. Most likely I
will do just that for logfs, just as a hint. Therefore, even with 8
byte keys, you'd be down to 32^4 or about a million. Prepare for more
levels.
Jörn
--
I don't understand it. Nobody does.
-- Richard P. Feynman
next prev parent reply other threads:[~2005-06-06 14:00 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-06 12:59 JFFS3 superblock search Artem B. Bityuckiy
2005-06-06 13:06 ` Artem B. Bityuckiy
2005-06-06 13:15 ` Jörn Engel
2005-06-06 13:45 ` Artem B. Bityuckiy
2005-06-06 14:00 ` Jörn Engel [this message]
2005-06-06 14:10 ` Artem B. Bityuckiy
2005-06-06 14:16 ` Jörn Engel
2005-06-06 14:22 ` Artem B. Bityuckiy
2005-06-06 14:39 ` Jörn Engel
2005-06-07 22:26 ` Jared Hulbert
2005-06-08 7:05 ` Artem B. Bityuckiy
2005-06-06 14:17 ` Artem B. Bityuckiy
2005-06-06 14:19 ` Jörn Engel
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