Return-Path: Delivered-To: apmail-db-derby-dev-archive@www.apache.org Received: (qmail 59877 invoked from network); 7 Jun 2005 08:33:07 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (209.237.227.199) by minotaur.apache.org with SMTP; 7 Jun 2005 08:33:07 -0000 Received: (qmail 98404 invoked by uid 500); 7 Jun 2005 08:33:06 -0000 Delivered-To: apmail-db-derby-dev-archive@db.apache.org Received: (qmail 98366 invoked by uid 500); 7 Jun 2005 08:33:05 -0000 Mailing-List: contact derby-dev-help@db.apache.org; run by ezmlm Precedence: bulk list-help: list-unsubscribe: List-Post: List-Id: Reply-To: "Derby Development" Delivered-To: mailing list derby-dev@db.apache.org Received: (qmail 98335 invoked by uid 99); 7 Jun 2005 08:33:05 -0000 X-ASF-Spam-Status: No, hits=0.0 required=10.0 tests= X-Spam-Check-By: apache.org Received-SPF: pass (hermes.apache.org: local policy) Received: from nwkea-mail-1.sun.com (HELO nwkea-mail-1.sun.com) (192.18.42.13) by apache.org (qpsmtpd/0.28) with ESMTP; Tue, 07 Jun 2005 01:33:04 -0700 Received: from phys-epost-2 ([129.159.136.15]) by nwkea-mail-1.sun.com (8.12.10/8.12.9) with ESMTP id j577BTKg007389 for ; Tue, 7 Jun 2005 00:11:30 -0700 (PDT) Received: from conversion-daemon.epost-mail1.sweden.sun.com by epost-mail1.sweden.sun.com (iPlanet Messaging Server 5.2 HotFix 1.24 (built Dec 19 2003)) id <0IHP00D01CQ86S@epost-mail1.sweden.sun.com> (original mail from Oystein.Grovlen@Sun.COM) for derby-dev@db.apache.org; Tue, 07 Jun 2005 09:11:29 +0200 (MEST) Received: from atum11.Norway.Sun.COM.sun.com (atum11.Norway.Sun.COM [129.159.112.211]) by epost-mail1.sweden.sun.com (iPlanet Messaging Server 5.2 HotFix 1.24 (built Dec 19 2003)) with ESMTP id <0IHP004RADB45Y@epost-mail1.sweden.sun.com> for derby-dev@db.apache.org; Tue, 07 Jun 2005 09:11:29 +0200 (MEST) Date: Tue, 07 Jun 2005 09:11:28 +0200 From: Oystein.Grovlen@sun.com (=?iso-8859-1?q?=D8ystein_Gr=F8vlen?=) Subject: Re: [jira] Commented: (DERBY-150) Disable logging In-reply-to: <42A45C4E.6000104@sun.com> To: Derby Development Message-id: MIME-version: 1.0 Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 8BIT User-Agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/21.2 Lines: 21 References: <1389432369.1118045080863.JavaMail.jira@ajax.apache.org> <42A45C4E.6000104@sun.com> X-Virus-Checked: Checked X-Spam-Rating: minotaur.apache.org 1.6.2 0/1000/N >>>>> "SK" == Shreyas Kaushik writes: SK> But turning off logging for recovery operations could hamper the SK> implementation of Derby's version of aries algo. Also, if the log is SK> not written to the disk and is maintianed elsewhere ( main memory ? ) SK> what do we do in case of hardware/CPU crash how does recovery happen ? SK> We'll have to have an architecture of failover, is that a good idea SK> for Derby ? It is a bit unclear from the report whether the submitter needsss to be able to recover from failures. If the application only uses the database for temporary data, it may be OK to start with a fresh database. The submitter says "he never use rollback" and think that he does not need logging. I am not sure he really means that it is OK for the database to become inconsistent should something unforeseen happen that make it impossible to commit a transaction (e.g., full disk). -- �ystein