Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1r66U4-00HBqY-BA for pgsql-admin@arkaria.postgresql.org; Thu, 23 Nov 2023 09:58:56 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.94.2) (envelope-from ) id 1r66U2-00H6q4-Iv for pgsql-admin@arkaria.postgresql.org; Thu, 23 Nov 2023 09:58:54 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1r66U1-00H6pn-Lf for pgsql-admin@lists.postgresql.org; Thu, 23 Nov 2023 09:58:54 +0000 Received: from admin.sibptus.ru ([2001:19f0:5001:21dc::10]) by magus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1r66Ty-0080Mb-7c for pgsql-admin@lists.postgresql.org; Thu, 23 Nov 2023 09:58:53 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sibptus.ru; s=20181118; h=Message-ID:Subject:To:From:Date:In-Reply-To; bh=Lt3Jkh330B7lDV3/K/o3Z3irufe698RpfhagZTWZSfs=; b=bKN74dbre2GYCvpnnEDseovjhV +ZuCJhnCgvZj/38pZO3je4QA7oQZqRmF6uE0RwtnAt4AP+XkNMbOuE6+09heNa9Gbkmq2Jqy2tuYC hDBFQh+zjRn4I7RpkwgT1KqRaVZKJCn8nC+OnQF2kKdremJBky8y+BCfnUWz1WmMV+cU=; Received: from vas by admin.sibptus.ru with local (Exim 4.96.1 (FreeBSD)) (envelope-from ) id 1r66Tw-000Nam-1g for pgsql-admin@lists.postgresql.org; Thu, 23 Nov 2023 09:58:48 +0000 Date: Thu, 23 Nov 2023 09:58:48 +0000 From: Victor Sudakov To: pgsql-admin@lists.postgresql.org Subject: Enable data checksums in a multi-node cluster without downtime Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-PGP-Key: http://admin.sibptus.ru/~vas/ X-PGP-Fingerprint: 10E3 1171 1273 E007 C2E9 3532 0DA4 F259 9B5E C634 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk Colleagues, Has anyone tried the final recommendation "How to enable data checksums in a multi-node cluster without downtime" in https://twitter.com/samokhvalov/status/1719969573318082822 ? Is it really safe to have checksums enabled on a replica (even for a while) while the primary is still running with checksums disabled? -- Victor Sudakov VAS4-RIPE http://vas.tomsk.ru/ 2:5005/49@fidonet