From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcel Lauhoff Subject: Re: Article about the OSD Journal Date: Thu, 26 Mar 2015 10:53:44 +0100 Message-ID: <87k2y484pj.fsf@irq0.org> References: <87mw3283ri.fsf@irq0.org> <659248388.5725609.1427268133773.JavaMail.zimbra@oxygem.tv> <88565551.5725616.1427268146452.JavaMail.zimbra@oxygem.tv> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from cpu0.net ([37.187.2.217]:43947 "EHLO cpu0.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752435AbbCZJxI (ORCPT ); Thu, 26 Mar 2015 05:53:08 -0400 Received: from janelane.irq0.org (x5d8266b1.dyn.telefonica.de [93.130.102.177]) by ks3366964.kimsufi.com (Postfix) with ESMTPSA id A6DDB8031A for ; Thu, 26 Mar 2015 09:53:06 +0000 (UTC) In-reply-to: <88565551.5725616.1427268146452.JavaMail.zimbra@oxygem.tv> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Alexandre DERUMIER Cc: ceph-devel Hi, Alexandre DERUMIER writes: > Hi, > > I didn't known about "nojournal" feature. > Does it make sense for full ssd setup ? or is it only a test/debug option ? To the best of my knowledge, no, "nojournal" isn't an alternative. In nojournal mode transaction commit acknowledgements are fired after a sync of the data disk. Meaning every 0.01 - 5 seconds in bulk. ~marcedl -- Marcel Lauhoff Mail/XMPP: ml@irq0.org http://irq0.org