Date: Wed, 1 Aug 2012 07:23:45 +0200 From: =?iso-8859-1?Q?Karli_Sj=F6berg?= <Karli.Sjoberg@slu.se> To: Bob Friesenhahn <bfriesen@simple.dallas.tx.us> Cc: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: Re: Hang when importing pool Message-ID: <17F43D74-958A-4AA7-9157-922397D80FC8@slu.se> In-Reply-To: <alpine.GSO.2.01.1207310831570.27589@freddy.simplesystems.org> References: <D13A3EA7-B229-4B78-915E-A3CC3162DB8A@slu.se> <alpine.GSO.2.01.1207310831570.27589@freddy.simplesystems.org>
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31 jul 2012 kl. 15.33 skrev Bob Friesenhahn: On Tue, 31 Jul 2012, Karli Sj=F6berg wrote: Hi, I=B4m really struggling with this. I have had a pool with imported filesystems from a Solaris system that had dedup activated. Then, when the time came to erase them, it just stalled. When rebooting, it stalled again at mounting filesystems, and since then, I=B4ve installed two USB drives to act as root pool with FreeBSD-9.0-RELEASE so that I could import the original pool in recovery, but it always stalls after a couple of hours. Looking at top, I could see that the 16GB RAM was maxed out, so I have heavily tuned down kmem, arc, etc: I think that you will need to find some way to temporarily add a dedicated L2ARC device (preferably an SSD or maybe iSCSI to a LUN on a machine with huge memory) or to find a machine with a lot more RAM. I already had a cache device added to the pool I wanted to import, but now = I understand it needed to be on the pool that was doing the actual importin= g, so I delete the one, big partition and split it into three. So the pool = I want to have imported has a 32G partition, which it has added as L2ARC. T= he pool that=B4s doing the importing has a 32G part added as swap, and the = remaining 160G added as L2ARC. From a Vertex 3 240G MLC I know performance = of the SSD isn=B4t an issue. Bob -- Bob Friesenhahn bfriesen@simple.dallas.tx.us<mailto:bfriesen@simple.dallas.tx.us>, http://w= ww.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ Med V=E4nliga H=E4lsningar ---------------------------------------------------------------------------= ---- Karli Sj=F6berg Swedish University of Agricultural Sciences Box 7079 (Visiting Address Kron=E5sv=E4gen 8) S-750 07 Uppsala, Sweden Phone: +46-(0)18-67 15 66 karli.sjoberg@slu.se<mailto:karli.sjoberg@adm.slu.se>
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