From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx1.redhat.com ([209.132.183.28]) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UxGaX-0008Nz-OF for kexec@lists.infradead.org; Thu, 11 Jul 2013 13:07:14 +0000 Date: Thu, 11 Jul 2013 09:06:47 -0400 From: Vivek Goyal Subject: Re: makedumpfile 1.5.4, 734G kdump tests Message-ID: <20130711130647.GA20962@redhat.com> References: <20130709162403.GA25441@sgi.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20130709162403.GA25441@sgi.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org To: Cliff Wickman Cc: kumagai-atsushi@mxc.nes.nec.co.jp, d.hatayama@jp.fujitsu.com, kexec@lists.infradead.org On Tue, Jul 09, 2013 at 11:24:03AM -0500, Cliff Wickman wrote: [..] > UV2000 memory: 734G > makedumpfile: makedumpfile-1.5.4 > kexec: git://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git > booted with crashkernel=1G,high crashkernel=192M,low > non-cyclic mode > > write to option init&scan sec. copy sec. dump size > ------------- ----------------- ---- --------- --------- > megaraid disk no compression 19 91 11.7G > megaraid disk zlib compression 20 209 1.4G > megaraid disk snappy compression 20 46 2.4G > megaraid disk snappy compression no mmap 30 72 2.4G > /dev/null no compression 19 28 - > /dev/null zlib compression 19 206 - > /dev/null snappy compression 19 41 - > > Notes and observations > - Snappy compression is a big win over zlib compression; over 4 times faster > with a cost of relatively little disk space. Thanks for the results Cliff. If it is not too much of trouble, can you please also test with lzo compression on same configuration. I am curious to know how much better snappy performs as compared to lzo. Thanks Vivek _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec