Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1XCKJm-0001mZ-GA for pgsql-performance@arkaria.postgresql.org; Wed, 30 Jul 2014 03:12:42 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1XCKJl-0000s1-OI for pgsql-performance@arkaria.postgresql.org; Wed, 30 Jul 2014 03:12:41 +0000 Received: from makus.postgresql.org ([2001:4800:1501:1::229]) by malur.postgresql.org with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1XCKJj-0000rN-Q2 for pgsql-performance@postgresql.org; Wed, 30 Jul 2014 03:12:39 +0000 Received: from mx-out.zmailcloud.com ([192.198.85.98] helo=mx-out-1.zmailcloud.com) by makus.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1XCKJg-0001oa-5s for pgsql-performance@postgresql.org; Wed, 30 Jul 2014 03:12:37 +0000 Received: from smtp.01.com (smtp.01.com [10.10.0.43]) by mx-out-1.zmailcloud.com (Postfix) with ESMTP id 1E5CB566C44 for ; Tue, 29 Jul 2014 22:12:35 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by smtp-out-1.01.com (Postfix) with ESMTP id 1698AA0318 for ; Tue, 29 Jul 2014 22:12:35 -0500 (CDT) X-Virus-Scanned: amavisd-new at smtp-out-1.01.com Received: from smtp.01.com ([127.0.0.1]) by localhost (smtp-out-1.01.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FFQZUbIUF2vu for ; Tue, 29 Jul 2014 22:12:35 -0500 (CDT) Received: from smtp.01.com (localhost [127.0.0.1]) by smtp-out-1.01.com (Postfix) with ESMTP id DB547A0552 for ; Tue, 29 Jul 2014 22:12:34 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by smtp-out-1.01.com (Postfix) with ESMTP id B2A11A0550 for ; Tue, 29 Jul 2014 22:12:34 -0500 (CDT) X-Virus-Scanned: amavisd-new at smtp-out-1.01.com Received: from smtp.01.com ([127.0.0.1]) by localhost (smtp-out-1.01.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id Pjh102WT2OOk for ; Tue, 29 Jul 2014 22:12:34 -0500 (CDT) Received: from [192.168.47.104] (50-1-62-215.dsl.dynamic.sonic.net [50.1.62.215]) by smtp-out-1.01.com (Postfix) with ESMTPSA id 583A4A0318 for ; Tue, 29 Jul 2014 22:12:34 -0500 (CDT) Message-ID: <53D862A0.80807@agliodbs.com> Date: Tue, 29 Jul 2014 20:12:32 -0700 From: Josh Berkus Organization: PostgreSQL Experts Inc. User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Why you should turn on Checksums with SSDs X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Pg-Spam-Score: -1.9 (-) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-performance Precedence: bulk Sender: pgsql-performance-owner@postgresql.org Explained here: https://www.usenix.org/system/files/conference/fast13/fast13-final80.pdf 13 out of 15 tested SSD's had various kinds of corruption on a power-out. (thanks, Neil!) -- Josh Berkus PostgreSQL Experts Inc. http://pgexperts.com -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance