linux-kernel - Re: [sqlite] light weight write barriers

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Message-ID: <20121025140325.49cd7c79@pyramind.ukuu.org.uk>
Date:	Thu, 25 Oct 2012 14:03:25 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"Theodore Ts'o" <tytso@....edu>
Cc:	Vladislav Bolkhovitin <vvvvvst@...il.com>,
	杨苏立 Yang Su Li <suli@...wisc.edu>,
	General Discussion of SQLite Database 
	<sqlite-users@...ite.org>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, drh@...ci.com
Subject: Re: [sqlite] light weight write barriers

> > Hopefully, eventually the storage developers will realize the value
> > behind ordered commands and learn corresponding SCSI facilities to
> > deal with them.
> 
> Eventually, drive manufacturers will realize that trying to price
> guage people who want advanced features such as TCQ, DIF/DIX, is the
> best way to gaurantee that most people won't bother to purchase them,
> and hence the features will remain largely unused....

I doubt they care. The profit on high end features from the people who
really need them I would bet far exceeds any other benefit of giving it to
others. Welcome to capitalism 8)

Plus - spinning rust for those end users is on the way out, SATA to flash
is a bit of hack and people are already putting a lot of focus onto
things like NVM Express.

Alan
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