From mboxrd@z Thu Jan 1 00:00:00 1970 From: Smart Weblications GmbH - Florian Wiessner Subject: Re: No lock on RBD allow several mount on different servers... Date: Sun, 12 Aug 2012 11:37:29 +0200 Message-ID: <50277959.1080603@smart-weblications.de> References: <06A44B2B-FA7F-418C-B9D2-D0602F4EB95B@gmail.com> Reply-To: f.wiessner@smart-weblications.de Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mx03.smart-weblications.de ([188.65.144.38]:53661 "EHLO mx03.smart-weblications.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751048Ab2HLJiE (ORCPT ); Sun, 12 Aug 2012 05:38:04 -0400 In-Reply-To: <06A44B2B-FA7F-418C-B9D2-D0602F4EB95B@gmail.com> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Sebastien HAN Cc: Marcus Sorensen , ceph-devel Am 12.08.2012 10:40, schrieb Sebastien HAN: >>>>>>> >>>>>>> With RBD images, the theory makes possible to mount them multip= le >>>>>>> times on different servers, of course **no one** wants that. If= you >>>>>>> care about the consistency of your data :D >>>>>>> I was wondering if ceph has any lock ability on the RBD device = like >>>>>>> DRBD does with secondary resource. Apparently not, I was able t= o mount >>>>>>> an image on multiple server and wrote data on both. >>>>>>> >>>>>>> Is this an incoming feature? >>>>>>> >>>>>>> I don't really know the difficulty level that this kind of feat= ure >>>>>>> implies, but it would be nice to have it. >>>>>>> I use ocfs2 ontop of mapped rbd images - works great. --=20 Mit freundlichen Gr=C3=BC=C3=9Fen, =46lorian Wiessner Smart Weblications GmbH Martinsberger Str. 1 D-95119 Naila fon.: +49 9282 9638 200 fax.: +49 9282 9638 205 24/7: +49 900 144 000 00 - 0,99 EUR/Min* http://www.smart-weblications.de -- Sitz der Gesellschaft: Naila Gesch=C3=A4ftsf=C3=BChrer: Florian Wiessner HRB-Nr.: HRB 3840 Amtsgericht Hof *aus dem dt. Festnetz, ggf. abweichende Preise aus dem Mobilfunknetz -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html