From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp0 ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms0.migadu.com with LMTPS id sJDSGfXNwGG4xgAAgWs5BA (envelope-from ) for ; Mon, 20 Dec 2021 19:39:49 +0100 Received: from aspmx1.migadu.com ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp0 with LMTPS id QBl9FfXNwGEXUAAA1q6Kng (envelope-from ) for ; Mon, 20 Dec 2021 18:39:49 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id 1201913F72 for ; Mon, 20 Dec 2021 19:39:47 +0100 (CET) Received: from localhost ([::1]:57492 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mzNZa-00054N-9w for larch@yhetil.org; Mon, 20 Dec 2021 13:39:46 -0500 Received: from eggs.gnu.org ([209.51.188.92]:41494) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mzNXu-00052i-I7 for bug-guix@gnu.org; Mon, 20 Dec 2021 13:38:02 -0500 Received: from debbugs.gnu.org ([209.51.188.43]:39891) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mzNXu-0001r4-37 for bug-guix@gnu.org; Mon, 20 Dec 2021 13:38:02 -0500 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1mzNXt-0000Py-Pz for bug-guix@gnu.org; Mon, 20 Dec 2021 13:38:01 -0500 X-Loop: help-debbugs@gnu.org Subject: bug#51787: Disk performance on ci.guix.gnu.org Resent-From: Bengt Richter Original-Sender: "Debbugs-submit" Resent-CC: bug-guix@gnu.org Resent-Date: Mon, 20 Dec 2021 18:38:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 51787 X-GNU-PR-Package: guix X-GNU-PR-Keywords: To: Mathieu Othacehe Received: via spool by 51787-submit@debbugs.gnu.org id=B51787.16400254271534 (code B ref 51787); Mon, 20 Dec 2021 18:38:01 +0000 Received: (at 51787) by debbugs.gnu.org; 20 Dec 2021 18:37:07 +0000 Received: from localhost ([127.0.0.1]:51437 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mzNX0-0000Og-Pp for submit@debbugs.gnu.org; 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aspmx1.migadu.com; dkim=none; dmarc=none; spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -2.02 Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=none; spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: 1201913F72 X-Spam-Score: -2.02 X-Migadu-Scanner: scn0.migadu.com X-TUID: zchDgM4nEfLT On +2021-12-20 17:59:33 +0100, Mathieu Othacehe wrote: > > Hey, > > > This is still pretty bad, but better than the <1M performance suggested > > by previous runs. > > Mmh interesting, I also have a x10 speed up on sdb by increasing the > block size from 4k to 512k. I'm not sure what conclusion should we draw > from this observation. > > In particular for our most urging matter, /gnu/store/trash > removal. Moving to a faster hard drive would definitely help here, but I > still don't understand if that disk performance regression comes from > Linux, the file-system fragmentation, or the disk itself. > > > READ: bw=1547MiB/s (1622MB/s), 1547MiB/s-1547MiB/s (1622MB/s-1622MB/s), io=3055MiB (3203MB), run=1975-1975msec > > WRITE: bw=527MiB/s (553MB/s), 527MiB/s-527MiB/s (553MB/s-553MB/s), io=1042MiB (1092MB), run=1975-1975msec > > Wooh that's fast! On test could be to copy the /gnu/store/trash content > to the SAN an observe how long that it takes for this operating to > complete. also might be interesting to copy to /dev/null to see read rate alone on /gnu/store? > > Thanks for your support on that complex topic :) > > Mathieu > > > -- Regards, Bengt Richter