From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754833AbYENWcu (ORCPT ); Wed, 14 May 2008 18:32:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755383AbYENWcZ (ORCPT ); Wed, 14 May 2008 18:32:25 -0400 Received: from relay.2ka.mipt.ru ([194.85.82.65]:49228 "EHLO 2ka.mipt.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754011AbYENWcX (ORCPT ); Wed, 14 May 2008 18:32:23 -0400 Date: Thu, 15 May 2008 02:32:03 +0400 From: Evgeniy Polyakov To: Jamie Lokier Cc: Jeff Garzik , Sage Weil , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: POHMELFS high performance network filesystem. Transactions, failover, performance. Message-ID: <20080514223155.GA19570@2ka.mipt.ru> References: <20080513174523.GA1677@2ka.mipt.ru> <4829E752.8030104@garzik.org> <20080513205114.GA16489@2ka.mipt.ru> <20080514135156.GA23131@2ka.mipt.ru> <482B378C.5070807@garzik.org> <20080514193843.GB10165@2ka.mipt.ru> <20080514215704.GE23758@shareable.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080514215704.GE23758@shareable.org> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 14, 2008 at 10:57:06PM +0100, Jamie Lokier (jamie@shareable.org) wrote: > > If desired, arrange it in a tree to reduce even the microseconds. > > Such network hardware is quite feasible, indeed quite easy with an > FPGA based NIC. > > Enjoy the speed :-) And if client-server link is fully saturated by messages we do not win :) We also lose if client-server is slower than server-server... I completely agree that there are cases where each approach is more beneficial, and likely client-to-many os better in terms of management and/or failover, but for speed there is always a different side of the coin. -- Evgeniy Polyakov