linux-kernel - Re: POHMELFS high performance network filesystem. Transactions, failover, performance.

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Message-ID: <482B3899.9070008@garzik.org>
Date:	Wed, 14 May 2008 15:08:09 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Evgeniy Polyakov <johnpol@....mipt.ru>
CC:	Jamie Lokier <jamie@...reable.org>, Sage Weil <sage@...dream.net>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: POHMELFS high performance network filesystem. Transactions, failover,
 performance.

Evgeniy Polyakov wrote:
> That can be the case if client connects to some gate server, which in
> turn broadcasts data further, that is how I plan to implement things at
> first.

That means you are less optimal than the direct-to-storage-server path 
in NFSv4.1, then........

<waves red flag in front of the bull>

If access controls permit, the ideal would be for the client to avoid an 
intermediary when storing data.  The client only _needs_ a consensus 
reply that their transaction was committed.  They don't necessarily need 
an intermediary to do the boring data transfer work.

	Jeff



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