From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from p3plsmtpa06-07.prod.phx3.secureserver.net (p3plsmtpa06-07.prod.phx3.secureserver.net [173.201.192.108]) by sourceware.org (Postfix) with ESMTPS id A3D0E3858C20 for ; Mon, 31 Jan 2022 14:52:02 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org A3D0E3858C20 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=kosowsky.org Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=kosowsky.org Received: from consult.pretender ([146.115.145.129]) by :SMTPAUTH: with ESMTPSA id EY2Dn7sYLJmPnEY2Dnl6IT; Mon, 31 Jan 2022 07:52:01 -0700 X-CMAE-Analysis: v=2.4 cv=ToQjOBbh c=1 sm=1 tr=0 ts=61f7f791 a=BYuR5sdBHlGgEYWvfiqr5Q==:117 a=BYuR5sdBHlGgEYWvfiqr5Q==:17 a=kj9zAlcOel0A:10 a=DghFqjY3_ZEA:10 a=fwhLn9VpGaNkdDevqxAA:9 a=CjuIK1q_8ugA:10 X-SECURESERVER-ACCT: inbox@kosowsky.org Received: from consult.pretender (localhost [127.0.0.1]) by consult.pretender (Postfix) with ESMTP id 12330290D827 for ; Mon, 31 Jan 2022 09:52:01 -0500 (EST) Received: by consult.pretender (Postfix, from userid 495) id 0D95C290D826; Mon, 31 Jan 2022 09:52:01 -0500 (EST) X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Level: Received: from consult.pretender (localhost [127.0.0.1]) by consult.pretender (Postfix) with ESMTPSA id 64A8D290D822 for ; Mon, 31 Jan 2022 09:52:00 -0500 (EST) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <25079.63376.349893.86395@consult.pretender> Date: Mon, 31 Jan 2022 09:52:00 -0500 To: cygwin@cygwin.com Subject: Renaming (with 'mv') very large files is SLOW X-Mailer: VM 8.2.0b under 25.2.2 (x86_64-pc-linux-gnu) From: cygwin@kosowsky.org X-Virus-Scanned: ClamAV using ClamSMTP X-CMAE-Envelope: MS4xfGcHP39CTyuq3/LwW4HOl3PW/JQleTurcbOOgk5/AcQsYBpCTQ7/VXUkPOB5Lft0iq94Gb+lWa41JGah3XENXA2QSshDjRnDJFamFdG7N2HDwGH0ZzrL 0e0pr4UXpqIrTvTiV2MlaGyE0DrY+sX5BGbmksAplgd3FWNJ8qPpe/8a2YWBwtjOB+fp9b0zLjpRY+EL+Tg13mmbtNwD86AA9ts= X-BeenThere: cygwin@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 31 Jan 2022 14:52:04 -0000 I tried renaming some very large files (20-40 GB) using: mv without changing the directory of course. The process took about 10-20 minutes with Task Manager showing disk activity of 100+ MB/s. Is there something about such large 'renaming' that actually results in the file being really moved (aka copied) rather than just renamed?