Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1na3yy-00038Z-QS for pgsql-admin@arkaria.postgresql.org; Thu, 31 Mar 2022 23:13:36 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1na3yx-0000Ep-FB for pgsql-admin@arkaria.postgresql.org; Thu, 31 Mar 2022 23:13:35 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1na3yx-0000Eg-4w for pgsql-admin@lists.postgresql.org; Thu, 31 Mar 2022 23:13:35 +0000 Received: from mailout.easymail.ca ([64.68.200.34]) by makus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1na3yu-0008OY-OM for pgsql-admin@lists.postgresql.org; Thu, 31 Mar 2022 23:13:34 +0000 Received: from localhost (localhost [127.0.0.1]) by mailout.easymail.ca (Postfix) with ESMTP id C487D8229F; Thu, 31 Mar 2022 23:13:30 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at emo02-pco.easydns.vpn Received: from mailout.easymail.ca ([127.0.0.1]) by localhost (emo02-pco.easydns.vpn [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7a3h-2S99DZl; Thu, 31 Mar 2022 23:13:30 +0000 (UTC) Received: from smtpclient.apple (unknown [4.28.96.150]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mailout.easymail.ca (Postfix) with ESMTPSA id 7739482281; Thu, 31 Mar 2022 23:13:30 +0000 (UTC) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 15.0 \(3693.60.0.1.1\)) Subject: Re: WAL & ZFS From: Scott Ribe In-Reply-To: <1dd2bcec-c145-b65b-21b8-0e391b05e8e4@gmail.com> Date: Thu, 31 Mar 2022 17:13:29 -0600 Cc: pgsql-admin@lists.postgresql.org Content-Transfer-Encoding: quoted-printable Message-Id: <26C01C4E-9D90-4E18-9976-6A1457428931@elevated-dev.com> References: <43EEBE2E-4C7F-4F35-99BF-4DA8B5D3828A@crazybean.net> <35c98a4b-f7a1-a896-4484-582bbaaffb5b@jakobs.com> <1dd2bcec-c145-b65b-21b8-0e391b05e8e4@gmail.com> To: Mladen Gogala X-Mailer: Apple Mail (2.3693.60.0.1.1) List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk > On Mar 31, 2022, at 5:09 PM, Mladen Gogala = wrote: >=20 > Journallng file systems journal file operations like open, close, = create, extend, rename or delete, not file block operations. File blocks = are not protected by file system journalling, just the inodes. The file = system journal prevents you from losing files in case of sudden machine = crash, like when the machine loses power. It has nothing to do with the = block change journaling, which is the role of WAL files.=20 LOL, I *knew* that about journaling file systems, thanks for reminding = me!=