Date: Sun, 20 Dec 2009 10:43:13 -0500 From: Hussain Ali <hali@datapipe.com> To: Thomas Burgess <wonslung@gmail.com>, Attila Nagy <bra@fsn.hu> Cc: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: RE: Plans for Logged/Journaled UFS Message-ID: <ABEED08E7552914DA1CF612FD778A73E4C820D74C8@EXMBSMQ01.datapipe-corp.net> In-Reply-To: <deb820500912200417s6796ff9w3d87957cdd8b8156@mail.gmail.com> References: <20091030223225.GI5120@datapipe.com> <4AEB6D79.5070703@feral.com> <4B2E0FA9.1050003@fsn.hu> <deb820500912200354q56bb4662u781cac8a7811d5f0@mail.gmail.com> <4B2E13E9.9000108@fsn.hu>, <deb820500912200417s6796ff9w3d87957cdd8b8156@mail.gmail.com>
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_______________________________________ From: owner-freebsd-fs@freebsd.org [owner-freebsd-fs@freebsd.org] On Behalf Of Thomas Burgess [wonslung@gmail.com] Sent: Sunday, December 20, 2009 7:17 AM To: Attila Nagy Cc: freebsd-fs@freebsd.org Subject: Re: Plans for Logged/Journaled UFS i remember reading that NFS needs tuning with ZFS even on solaris so you might want to look into that....i'm not an expert though. I CAN say this though. I have a machine with 12 drives and 8gb ram that i use for samba. FreeBSD 8.0 ZFS v13 It has only 10 or so clients but it has no problem maxing out 2 gigabit lines and it never freezes. It took some tuning for samba but it works great. On Sun, Dec 20, 2009 at 7:09 AM, Attila Nagy <bra@fsn.hu> wrote: > For that problem, it can be true, the machine in speak has only 1 GB RAM > (i386), although 8 disks. > The freeze is a different beast, I've got it on 32-64 GB RAM machines (with > NFS), and on 8 GB machines serving stuff with ftp/http/rsync/etc (no NFS). > I'm not sure that the NFS and the non-NFS case is the same though. > > Thomas Burgess wrote: > >> >> I think it depends on hardware and setup. I've noticed the "zfs problem" >> with SOME machines when it comes to rtorrent (the rtorrent process will be >> stuck "waiting for disk" but on other machines it's fine. >> The machines i've had the most problem with are single drive less than 2 >> gb ram. >> >> I've got rtorrent and zfs working fine on plenty of machines with 2-3 hard >> drives and 4-8 gb ram. >> >> On Sun, Dec 20, 2009 at 6:51 AM, Attila Nagy <bra@fsn.hu <mailto: >> bra@fsn.hu>> wrote: >> >> Matthew Jacob wrote: >> >> Hussain Ali wrote: >> >> >> ZFS doesnt suffice for may use cases - so just wondering >> if this is in >> the works. >> >> >> Which use cases can you name? >> >> Reliable data storage. :( >> >> Sadly, ZFS in FreeBSD is still very far from being stable. For >> example I have NFS servers running on ZFS, and they freeze about >> every week. It seems it's related to NFS. >> I can't even get to the debugger. After sending an NMI, the kernel >> writes "NMI ... going to debugger" eight times (those machines >> have 8 CPU cores) and nothing happens, I can only reset. >> >> Another machine just looses ZFS access (all processes stuck in IO) >> on i386 if I run rtorrent with unlimited bandwidth with some >> torrents, or some disk intensive spam filtering. Access to UFS >> filesystems are still OK. >> >> Also, running UFS and ZFS seems to have problems in 8-STABLE with >> UFS eating out memory from ZFS. >> _______________________________________________ >> freebsd-fs@freebsd.org <mailto:freebsd-fs@freebsd.org> mailing list >> >> http://lists.freebsd.org/mailman/listinfo/freebsd-fs >> To unsubscribe, send any mail to >> "freebsd-fs-unsubscribe@freebsd.org >> <mailto:freebsd-fs-unsubscribe@freebsd.org>" >> >> >> > ZFS is great for data warehousing and non high performance/high concurrent operations (Seen this on Solaris and FreeBSD). I have about 350TB in FreeBSD's ZFS and its been running very stable but this is a data warehouse and I am not running off the shelf components either (HP DL 385's, Nexsan Satabeasts). Ever use ZFS as a target for a replication for large and active MySQL DB, you would notice days worth of lag within a week (on same gear as the primay!). My cases maybe on the non typical average FreeBSD user usage, but for any large hosting environment I would assume its similar. Anyway seems like we may see a journaled UFS in FreeBSD sometime soon. I hope the changes are minimal so its MFC'ed back into [78]-Stable. http://jeffr-tech.livejournal.com/22716.html This message may contain confidential or privileged information. If you are not the intended recipient, please advise us immediately and delete this message. See http://www.datapipe.com/emaildisclaimer.aspx for further information on confidentiality and the risks of non-secure electronic communication. If you cannot access these links, please notify us by reply message and we will send the contents to you.help
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