Re: Implementing SQL on files
From: Anuradha Ratnaweera (anuradha_at_linux.lk)
Date: 02/16/04
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To: Hans Reiser <reiser@namesys.com> Date: Mon, 16 Feb 2004 10:27:09 +0600
On Sun, 2004-02-15 at 11:39, Hans Reiser wrote:
>
> I hate SQL but I will cooperate with persons seeking to use our storage
> layer to support it.
Thanks Hans. I am not an SQL fan either. But more than SQL this
is about database like storage simantics in the filesystem. I had
this idea in my mind for some time, but the real motivation came
after seeing the Reiserfs 4 page, notably this section:
http://www.namesys.com/v4/v4.html#design_flaws_details
and hopefully the plugin design will make life much easier.
By looking at the feedback I got off the list, I think there is a
couple of points I need to clarify.
o The plan is _not_ to implement a fully flegded database inside
the kernel. Only the storage (well, "only" may not be the most
appropriate word here, because this involves a _lot_ of work)
and the relation operation primitives - or database operation
primitives to be more general - are implemented in the kernel
space.
o Userspace tools are necessary to parse a query, optimize if
necessary, and pass the result (which is a tree) to the kernel.
And the nodes of the parsed tree will map to the primitives
implemented in the kernel.
And most likely, I would be using an exiting database to do the
heavy userspace work (suggested by Peter Zaitsev of MySQL).
Thanks for all the suggessions and comments (mostly offline).
Anuradha
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- Previous message: Benjamin Herrenschmidt: "[PATCH] radeonfb: limit ioremap size & debug output"
- In reply to: Hans Reiser: "Re: Implementing SQL on files"
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