Date: Wed, 8 Jun 2005 20:52:39 +0800 From: Xin LI <delphij@frontfree.net> To: Pierre DAVID <Pierre.David@crc.u-strasbg.fr> Cc: freebsd-stable@freebsd.org Subject: Re: Show stopper for large disks with 5.4-RELEASE Message-ID: <20050608125239.GA45279@frontfree.net> In-Reply-To: <20050608123137.GA6872@vagabond.ma.maison> References: <20050608123137.GA6872@vagabond.ma.maison>
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--WIyZ46R2i8wDzkSu Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi, Pierre, On Wed, Jun 08, 2005 at 02:31:37PM +0200, Pierre DAVID wrote: > Hi, >=20 > we are setting up a mail server for ~50 000 users, with around 1.8TB > on a DAS storage (HP MSA 500). >=20 > We were planning to use FreeBSD (5.4-RELEASE), as with all other > servers in our machine room. >=20 > However, we are encountering a show stopper: after an unclean > shutdown, the snapshot that fsck creates is taking too much time > (more than 20 minutes). During the most part of this time, all I/O > are frozen on this large disk, so the server cannot serve our > clients. Our SLA constraints do not allow us to have these recovery > times. Would you please provide a bit more of information so we can investigate what was happening, like: - first few lines dumpfs(8) output from your storage filesystem - df -i on your storag filesystem - dmesg.boot from your /var/run I think the delay is too long. Taking a snapshot on a large volume is slow, but should not be that slow :-) We run similiar mail server at company, but with ~10x of users and 2x storage (divided into two RAID groups). Hope I would be able to provide some help. Cheers, --=20 Xin LI <delphij frontfree net> http://www.delphij.net/ See complete headers for GPG key and other information. --WIyZ46R2i8wDzkSu Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCpuoX/cVsHxFZiIoRAmMMAKCB1QOwzZe+vfZrfiWFBPoZMZZFmACgiCAb azo2W+iKrbXUqNuuBVUkgrM= =MB6P -----END PGP SIGNATURE----- --WIyZ46R2i8wDzkSu--
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