From: "Grzegorz Jaśkiewicz" <gryzman@gmail.com>
To: Faraz S <farazs@calsoftinc.com>
Cc: ReiserFS List <reiserfs-list@namesys.com>
Subject: Re: Comments about indexing and query solving in user land
Date: Mon, 6 Sep 2004 14:51:59 +0200 [thread overview]
Message-ID: <2f4958ff040906055172c36214@mail.gmail.com> (raw)
In-Reply-To: <-3757055227027460326@unknownmsgid>
On Mon, 06 Sep 2004 14:32:34 +0530, Faraz S <farazs@calsoftinc.com> wrote:
> In our project http://sourceforge.net/projects/linuxsfs-tm/ we did the
> attribute indexing and query parsing in the user-space and we had hooks
> in the VFS which communicated with the user-space deamons. As far as
> directory listing is concerned we had a in kernel-recordset cache
> (hashed on the query). The listing were pretty efficient.
>
> But the real problem occured when a large number of files were copied
> in the onto our file system. All the files now need to be indexed in the
> user space , leading to mode switch. That was pathetically slooow. The
> entire 2.4 sources were copied in 5-6 hours. I think this problem could
> be solved by batching requests the user space deamon. Then u have all
> the problems on missing out on indexing on a large set of files.
I think that should give you pretty much explanation why whole VFS
layer and filesystems are in kernel not in user space. That's where
such sort of thing belongs to. I have no doubts.
--
GJ
next parent reply other threads:[~2004-09-06 12:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <-3757055227027460326@unknownmsgid>
2004-09-06 12:51 ` Grzegorz Jaśkiewicz [this message]
2004-09-07 20:09 ` Comments about indexing and query solving in user land daniel.poelzleithner
2004-09-06 9:02 Faraz S
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