From owner-freebsd-fs@FreeBSD.ORG Tue Jul 8 20:54:54 2008 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B6E751065671; Tue, 8 Jul 2008 20:54:54 +0000 (UTC) (envelope-from phoemix@harmless.hu) Received: from marvin.harmless.hu (marvin.harmless.hu [195.56.55.204]) by mx1.freebsd.org (Postfix) with ESMTP id 6F8EA8FC19; Tue, 8 Jul 2008 20:54:54 +0000 (UTC) (envelope-from phoemix@harmless.hu) Received: from pool-0123.adsl.interware.hu ([213.178.100.123] helo=mort.in.publishing.hu) by marvin.harmless.hu with esmtpa (Exim 4.69 (FreeBSD)) (envelope-from ) id 1KGKD7-000J8L-6j; Tue, 08 Jul 2008 22:54:53 +0200 Date: Tue, 8 Jul 2008 22:54:49 +0200 From: CZUCZY Gergely To: Kris Kennaway Message-ID: <20080708225449.1070252d@mort.in.publishing.hu> In-Reply-To: <4873CF6C.7000205@FreeBSD.org> References: <20080708100701.57031cda@twoflower.in.publishing.hu> <4873C4FA.2020004@FreeBSD.org> <20080708221327.5c1d0e92@mort.in.publishing.hu> <4873CF6C.7000205@FreeBSD.org> Organization: Harmless Digital Bt X-Mailer: Claws Mail 3.3.1 (GTK+ 2.12.1; i386-portbld-freebsd6.3) Mime-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/abNulJsU+urI/gQ7PKIQqRh"; protocol="application/pgp-signature"; micalg=PGP-SHA1 Cc: freebsd-fs@freebsd.org Subject: Re: Thinking of using ZFS/FBSD for a backup system X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Jul 2008 20:54:54 -0000 --Sig_/abNulJsU+urI/gQ7PKIQqRh Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Tue, 08 Jul 2008 22:34:52 +0200 Kris Kennaway wrote: > > I've finetuned ZFS as much as I could, I've read every little tiny > > bit of hint/information/whatever that was available and I couldn't > > get rid of those kmem_size panics in -RELEASE and -STABLE. >=20 > Well, it's still almost certainly because you aren't setting > kmem_size high enough. As you saw, that is the only thing I tuned > (disabling prefetch is just for performance in my environment). >=20 > If you can't set it high enough because you don't have enough RAM, > that means your system does't have enough RAM to run ZFS, not that > ZFS is unstable. I've had a box with 2GB of memory for it, and around 5-6 filesystems. I've set kmem_size as large as it was allowed, not a bit smaller. Where's the guide showing how much memory should I have for a setup? How can "enough memory" be determined for a setup, without having panics? >=20 > Kris >=20 --=20 Sincerely, Gergely CZUCZY, Harmless Digital mailto: gergely.czuczy@harmless.hu Legacy software is software that works. --Sig_/abNulJsU+urI/gQ7PKIQqRh Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFIc9QbzrC0WyuMkpsRAjp9AJwOJy2wFJQBNmIbZ+Tz0Wrl/UhjDgCgidoR AsR0Sct76jVPpbgsAoyjiaM= =3uD9 -----END PGP SIGNATURE----- --Sig_/abNulJsU+urI/gQ7PKIQqRh--