Date: Tue, 23 Jul 2013 20:49:46 -0700 From: aurfalien <aurfalien@gmail.com> To: Dan Nelson <dnelson@allantgroup.com> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: TRIM and changing mount options Message-ID: <437A347C-B4E8-4648-ABB4-F8378955F83F@gmail.com> In-Reply-To: <20130724025547.GC82464@dan.emsphone.com> References: <316706C7-F038-4110-BB36-8EDFF9DC6A6B@gmail.com> <20130724025547.GC82464@dan.emsphone.com>
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On Jul 23, 2013, at 7:55 PM, Dan Nelson wrote: > In the last episode (Jul 23), aurfalien said: >> I've some what blindly followed a how to on installing FreeBSD 9.1 on = a >> ZFS mirror. >>=20 >> My typing is horrid so I simply ssh'd to a live CD env and pasted = line by >> line as per the how to found here; >>=20 >> = http://wp.strahlert.net/wordpress/zfs-2/installing-freebsd-9-1-using-root-= on-zfs-and-gpt-disks/ >>=20 >> All is well, no issues with replacing disks, testing failures etc... >>=20 >> But seeing that my system drives are SSDs, I thought to perhaps add >> noatime, etc... to avoid slow downs common in excessive SSD usage. >>=20 >> However my fstab is only mounting swap partitions and I have no idea = how >> my file system is being mounted :) >>=20 >> Also, I would like to use tunefs in finding if I have TRIM enabled as = I >> did load it via boot.conf >>=20 >> I kinda feel like I'm willy nilly adding load lines w/o seeing if I >> actually have the TRIM patch installed :) >>=20 >> At any rate, could some one; >>=20 >> a) Explain how I am loading my file system as I'm used to fstab? >> b) How to run tunefs on my zroot >> c) How to determine if I actually have the needed TRIM support in my = kernel >=20 > ZFS automatically opens pools that were previously imported ( this = info is > stored in /boot/zfs/zpool.cache ), and automatically mounts any = filesystems > that have a mountpoint specified, so fstab isn't needed. >=20 > Tunefs is a UFS-only command, Read the man page after sending, sorry for this. I try not to post obvious stuff, meaning ones that you can 'man' :) > so it won't help you here. Most zfs > properties can be set on the fly with the "zfs" command. You can = disable > atime on your ZFS filesytem with "zfs set atime=3Doff zroot". All the > filesystems created in zpool will inherit the value. >=20 > I'm not sure if there's a way to query TRIM status on arbitrary geom > providers, but you can see whether zfs successfully sent any TRIM = requests > by watching the output of "sysctl kstat.zfs.misc.zio_trim". If > .zio_trim.success increments and .unsupported (or .failed) doesn't, = then you > know that it's working. Looks like I don't have it. I keep reading that I must download the patch and make it which is not = an issue. But I can't seem to find it. So I got this; http://blog.multiplay.co.uk/dropzone/freebsd/zfs-trim-patchset83.tbz But I keep reading that I need PJDs zfs patch set in addition. I've been reading this; = http://freebsd.1045724.n5.nabble.com/ZFS-TRIM-support-committed-to-HEAD-td= 5746045.html Do you know how I can pull the source for this? I've dl'd the 9.2 beta in hopes to check its src and see if its there. Looks like all I really need is the current rel. - aurf=
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