From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stan Hoeppner Subject: Re: Solving the raid write performance problems Date: Tue, 02 Apr 2013 11:10:41 -0500 Message-ID: <515B0301.7030002@hardwarefreak.com> References: <2420596.ZXG94NVieB@xrated> Reply-To: stan@hardwarefreak.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <2420596.ZXG94NVieB@xrated> Sender: linux-raid-owner@vger.kernel.org To: Hans-Peter Jansen Cc: Peter Landmann , linux-raid@vger.kernel.org List-Id: linux-raid.ids On 4/2/2013 8:29 AM, Hans-Peter Jansen wrote: > Next, check, if you can address Stan Hoeppner's remarks from that thread. > > Compare test runs with variation in # of cores and numa affinity, nothing > else. Be careful about the SSD state regarding wear leveling. Provide > performance comparison charts. NUMA affinity is only applicable for multi-socket systems, or single socket systems using a dual die MCM CPU, such as the AMD Magny Cours and Interlagos. Thus any work on NUMA optimization requires such a system, or possibly a simulator. -- Stan