linux-ext4 - Re: Atomic non-durable file write API

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Message-ID: <4D18E94C.3080908@ontolinux.com>
Date:	Mon, 27 Dec 2010 20:30:20 +0100
From:	Christian Stroetmann <stroetmann@...olinux.com>
To:	Olaf van der Spek <olafvdspek@...il.com>
CC:	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-ext4@...r.kernel.org, Ted Ts'o <tytso@....edu>,
	Nick Piggin <npiggin@...il.com>
Subject: Re: Atomic non-durable file write API

On the 27.12.2010 20:07, Olaf van der Spek wrote:
> On Mon, Dec 27, 2010 at 4:30 PM, Christian Stroetmann
> <stroetmann@...olinux.com>  wrote:
>>> Like I've said dozens of times, this is not about full DB functionality.
>>> Why do you keep making false analogies?
>> The analogy is not so wrong. The concepts atomicity and abort/rollback your
>> are talking about are also concepts of the field of database management
>> systems (DBMSs). And once you have established the Atomicity, which is the A
>> of the principle ACID of DBMSs, you have the basis for establishing the
>> rest, the CID.
>>
>> And you even went further into this DBMS direction by letting down the
>> requirement of non-durability.
> Of course the concepts are the same. That doesn't mean the analogy is valid.

Btw.: There is even no analogy: "The concepts are the same".

>>> Still waiting on any hint for why that performance loss would happen.
>> > From my point of view, the loss of performance depends on what is
>> benchmarked in which way.
> Maybe, but still no indication of why.

If you have a solution, then you really should show other persons the 
working source code.
For me speaking: I like such technologies and I'm also interested in 
your attempts.

> Olaf

Christian Stroetmann
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