From owner-freebsd-fs@FreeBSD.ORG Wed Apr 10 13:23:54 2013 Return-Path: Delivered-To: freebsd-fs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 068EB44C for ; Wed, 10 Apr 2013 13:23:54 +0000 (UTC) (envelope-from marck@rinet.ru) Received: from woozle.rinet.ru (woozle.rinet.ru [195.54.192.68]) by mx1.freebsd.org (Postfix) with ESMTP id 877A0ED7 for ; Wed, 10 Apr 2013 13:23:53 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by woozle.rinet.ru (8.14.5/8.14.5) with ESMTP id r3ADNp9n041411 for ; Wed, 10 Apr 2013 17:23:51 +0400 (MSK) (envelope-from marck@rinet.ru) Date: Wed, 10 Apr 2013 17:23:51 +0400 (MSK) From: Dmitry Morozovsky To: freebsd-fs@FreeBSD.org Subject: ZFS-inly server and dedicated ZIL Message-ID: User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) X-NCC-RegID: ru.rinet X-OpenPGP-Key-ID: 6B691B03 MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Apr 2013 13:23:54 -0000 Dear colleagues, I'm planning to make new PostgreSQL server using zaid10-like ZFS with two SSDs splitted into mirrored ZIL and striped arc2. However, it seems current ZFS implementation does not support this: ./lib/libzfs/common/libzfs_pool.c- case EDOM: ./lib/libzfs/common/libzfs_pool.c- zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, ./lib/libzfs/common/libzfs_pool.c: "root pool can not have multiple vdevs" ./lib/libzfs/common/libzfs_pool.c- " or separate logs")); ./lib/libzfs/common/libzfs_pool.c- (void) zfs_error(hdl, EZFS_POOL_NOTSUP, msg); Am I right, or did I missed something obvious? Ok, if so: In this situation, I see two possibilities: - make system boot from internal USB stick (only /bootdisk with /boot and /rescue) with the rest of ZFS-on-root - use dedicated pair of disks for ZFS pool without ZIL for system. what would you recommend? Thanks! -- Sincerely, D.Marck [DM5020, MCK-RIPE, DM3-RIPN] [ FreeBSD committer: marck@FreeBSD.org ] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** ------------------------------------------------------------------------