Storage question
William A. Mahaffey III
wam at hiwaay.net
Thu Sep 10 12:28:22 UTC 2015
On 09/09/15 19:58, Paul Kraus wrote:
> On Sep 9, 2015, at 16:38, William A. Mahaffey III <wam at hiwaay.net> wrote:
>
>> Actually, I do have 1 more question. Partway down in the setup, stuff is echoed to /tmp/bsdinstall_etc/fstab to setup swap, but nothing about the other parts of the FS (ZFS stuff) .... Is that AOK ? TIA & have a good one.
> ZFS handles mounts itself. One of the properties of a mountable dataset is “mountpoint”. take a look at the ‘zfs mount -a’ command and picture it being run at boot time.
>
> Under 9.x you used to have to still put the / filesystem in /etc/fstab (and set the mountpoint to “legacy” in zfs. Under 10.x the zfs boot loader knows how to find and mount the / filesystem, so you do not need an /etc/fstab at all (except for swap as pervious discussed).
Hmmmm .... no mention of explicitly mounting root in fstab in the stuff
I copied, that must have been 9.x-earlier-than-9.3R ....
>
> The zfs configuration on my home server is:
>
> [ppk at FreeBSD2 ~]$ zpool status
> pool: KrausHaus
> state: ONLINE
> scan: scrub repaired 0 in 2h30m with 0 errors on Thu Jul 16 00:28:32 2015
> config:
>
> NAME STATE READ WRITE CKSUM
> KrausHaus ONLINE 0 0 0
> mirror-0 ONLINE 0 0 0
> diskid/DISK-Z1W1ZKD6 ONLINE 0 0 0
> diskid/DISK-Z1N3V3J9 ONLINE 0 0 0
> diskid/DISK-WD-WMC5K0159058 ONLINE 0 0 0
> mirror-1 ONLINE 0 0 0
> diskid/DISK-Z1N08WTM ONLINE 0 0 0
> diskid/DISK-JPW9K0N018164L ONLINE 0 0 0
> diskid/DISK-Z1N3WQ8V ONLINE 0 0 0
> mirror-2 ONLINE 0 0 0
> diskid/DISK-WD-WMC5K0157777 ONLINE 0 0 0
> diskid/DISK-9QJ5252G ONLINE 0 0 0
> diskid/DISK-Z1W20AP6 ONLINE 0 0 0
>
> errors: No known data errors
>
> pool: freebsd2
> state: ONLINE
> scan: scrub repaired 0 in 0h0m with 0 errors on Fri Jun 19 22:28:40 2015
> config:
>
> NAME STATE READ WRITE CKSUM
> freebsd2 ONLINE 0 0 0
> mirror-0 ONLINE 0 0 0
> diskid/DISK-50026B72350338B2p3 ONLINE 0 0 0
> diskid/DISK-50026B7235033306p3 ONLINE 0 0 0
>
> errors: No known data errors
> [ppk at FreeBSD2 ~]$ zfs list
> NAME USED AVAIL REFER MOUNTPOINT
> KrausHaus 1.81T 892G 144K none
> KrausHaus/dnr 144K 1024M 144K none
> KrausHaus/export 1.80T 892G 1.80T /export
> KrausHaus/freebsd1 5.75G 892G 5.75G /freebsd1
> KrausHaus/freebsd2 144K 892G 144K /freebsd2
> KrausHaus/usr-ports 2.42G 892G 2.42G /usr/ports
> KrausHaus/usr-src 997M 892G 997M /usr/src
> freebsd2 6.02G 9.61G 36K none
> freebsd2/ROOT 679M 9.61G 32K none
> freebsd2/ROOT/10-Release 1K 9.61G 495M /
> freebsd2/ROOT/20140912 1K 9.61G 478M /
> freebsd2/ROOT/default 679M 9.61G 486M /
> freebsd2/dnr 31K 1024M 31K none
> freebsd2/tmp 63.5K 9.61G 63.5K /tmp
> freebsd2/usr 3.92G 9.61G 353M /usr
> freebsd2/usr/local 3.57G 9.61G 3.57G /usr/local
> freebsd2/var 445M 9.61G 423M /var
> freebsd2/var/log 22.1M 9.61G 22.1M /var/log
> [ppk at FreeBSD2 ~]$
>
> And the boot drives are partitioned as follows;
>
> [ppk at FreeBSD2 ~]$ gpart show /dev/diskid/DISK-50026B72350338B2
> => 34 234441581 diskid/DISK-50026B72350338B2 GPT (112G)
> 34 1024 1 freebsd-boot (512K)
> 1058 8388608 2 freebsd-swap (4.0G)
> 8389666 33554432 3 freebsd-zfs (16G)
> 41944098 50331648 4 freebsd-zfs (24G)
> 92275746 50331648 5 freebsd-zfs (24G)
> 142607394 91834221 - free - (44G)
>
> [ppk at FreeBSD2 ~]$
>
> They are small (120 GB ) SSDs and my plan was to use part ions 4 and 5 as mirrored SLOG and individual L2ARC devices, but I never got them setup.
>
> This is 10.0 (I need to upgrade to at least 10.1) but I had a very similar configuration for my previous 9.x server.
>
> Note that my entire OS except for /usr/src and /usr/ports lives in 16 GB. I put /usr/src and /usr/ports in the zpool with the data as they receive the vast majority of writes and I wanted to save my SSD write capacity for the SLOG and L2ARC.
>
> Note also the “dnr” datasets :-)
>
> --
> Paul Kraus
> paul at kraus-haus.org
Yeah, you mentioned the dnr earlier, I will put that in. Thanks.
--
William A. Mahaffey III
----------------------------------------------------------------------
"The M1 Garand is without doubt the finest implement of war
ever devised by man."
-- Gen. George S. Patton Jr.
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