From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [IPv6:2a01:7e0:0:424::9]) by lore.proxmox.com (Postfix) with ESMTPS id 663D51FF164 for ; Wed, 25 Sep 2024 10:40:15 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id D8D611C2D2; Wed, 25 Sep 2024 10:40:27 +0200 (CEST) Date: Wed, 25 Sep 2024 10:39:54 +0200 (CEST) From: Dietmar Maurer To: Proxmox VE development discussion , Filip Schauer Message-ID: <623295300.4070.1727253594226@webmail.proxmox.com> In-Reply-To: <20240924143321.93696-1-f.schauer@proxmox.com> References: <20240924143321.93696-1-f.schauer@proxmox.com> MIME-Version: 1.0 X-Priority: 3 Importance: Normal X-Mailer: Open-Xchange Mailer v7.10.6-Rev68 X-Originating-Client: open-xchange-appsuite X-SPAM-LEVEL: Spam detection results: 0 AWL 0.345 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment RCVD_IN_VALIDITY_CERTIFIED_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. RCVD_IN_VALIDITY_RPBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. RCVD_IN_VALIDITY_SAFE_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: Re: [pve-devel] [PATCH common] tools: file_set_contents: use syswrite instead of print X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Proxmox VE development discussion Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: pve-devel-bounces@lists.proxmox.com Sender: "pve-devel" Please can you add the column showing write amplification using dd instead of file_set_contents, so that we can also see the minimal write amplf. from sqlite. > The table below illustrates the drastic reduction in write > amplification when writing files of different sizes to `/etc/pve/` using > `file_set_contents`: > > print big_writes+print big_writes+syswrite > data size written amplif. written amplif. written amplif. > 1 KiB 48 KiB 48.0 45 KiB 45.0 41 KiB 41.0 > 2 KiB 48 KiB 24.0 45 KiB 22.5 62 KiB 31.0 > 4 KiB 82 KiB 20.5 80 KiB 20.0 73 KiB 18.3 > 8 KiB 121 KiB 15.1 90 KiB 11.3 89 KiB 11.1 > 16 KiB 217 KiB 13.6 146 KiB 9.1 113 KiB 7.1 > 32 KiB 506 KiB 15.8 314 KiB 9.8 158 KiB 4.9 > 64 KiB 1472 KiB 23.0 826 KiB 12.9 259 KiB 4.0 > 128 KiB 5585 KiB 43.6 3765 KiB 29.4 452 KiB 3.5 > 256 KiB 20424 KiB 79.8 10743 KiB 42.0 2351 KiB 9.2 > 512 KiB 86715 KiB 169.4 43650 KiB 85.3 3204 KiB 6.3 > 1024 KiB 369568 KiB 360.9 187496 KiB 183.1 15845 KiB 15.5 > _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel