16.0E ExpandSize? -- New Server
Larry Rosenman
ler at FreeBSD.org
Tue Jan 31 21:00:36 UTC 2017
borg-new /home/ler $ sudo ./vdev-stats.d
Password:
vdev_path: n/a, vdev_max_asize: 0, vdev_asize: 0, vdev_min_asize: 0
vdev_path: n/a, vdev_max_asize: 11947471798272, vdev_asize:
11947478089728, vdev_min_asize: 11888469475328
vdev_path: /dev/mfid4p4, vdev_max_asize: 1991245299712, vdev_asize:
1991245299712, vdev_min_asize: 1981411579221
vdev_path: /dev/mfid0p4, vdev_max_asize: 1991246348288, vdev_asize:
1991246348288, vdev_min_asize: 1981411579221
vdev_path: /dev/mfid1p4, vdev_max_asize: 1991246348288, vdev_asize:
1991246348288, vdev_min_asize: 1981411579221
vdev_path: /dev/mfid3p4, vdev_max_asize: 1991247921152, vdev_asize:
1991247921152, vdev_min_asize: 1981411579221
vdev_path: /dev/mfid2p4, vdev_max_asize: 1991246348288, vdev_asize:
1991246348288, vdev_min_asize: 1981411579221
vdev_path: /dev/mfid5p4, vdev_max_asize: 1991246348288, vdev_asize:
1991246348288, vdev_min_asize: 1981411579221
^C
borg-new /home/ler $
borg-new /home/ler $ sudo zpool list -v
Password:
NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
zroot 10.8T 94.3G 10.7T 16.0E 0% 0% 1.00x ONLINE -
raidz1 10.8T 94.3G 10.7T 16.0E 0% 0%
mfid4p4 - - - - - -
mfid0p4 - - - - - -
mfid1p4 - - - - - -
mfid3p4 - - - - - -
mfid2p4 - - - - - -
mfid5p4 - - - - - -
borg-new /home/ler $
On 01/31/2017 2:37 pm, Steven Hartland wrote:
> In that case based on your zpool history I suspect that the original mfid4p4 was the same size as mfid0p4 (1991246348288) but its been replaced with a drive which is (1991245299712), slightly smaller.
>
> This smaller size results in a max_asize of 1991245299712 * 6 instead of original 1991246348288* 6.
>
> Now given the way min_asize (the value used to check if the device size is acceptable) is rounded to the the nearest metaslab I believe that replace would be allowed.
> https://github.com/freebsd/freebsd/blob/master/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c#L4947
>
> Now the problem is that on open the calculated asize is only updated if its expanding:
> https://github.com/freebsd/freebsd/blob/master/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c#L1424
>
> The updated dtrace file outputs vdev_min_asize which should confirm my suspicion about why the replace was allowed.
>
> On 31/01/2017 19:05, Larry Rosenman wrote:
>
> I've replaced some disks due to failure, and some of the pariition sizes are different.
>
> autoexpand is off:
>
> borg-new /home/ler $ zpool get all zroot
> NAME PROPERTY VALUE SOURCE
> zroot size 10.8T -
> zroot capacity 0% -
> zroot altroot - default
> zroot health ONLINE -
> zroot guid 11945658884309024932 default
> zroot version - default
> zroot bootfs zroot/ROOT/default local
> zroot delegation on default
> zroot autoreplace off default
> zroot cachefile - default
> zroot failmode wait default
> zroot listsnapshots off default
> zroot autoexpand off default
> zroot dedupditto 0 default
> zroot dedupratio 1.00x -
> zroot free 10.7T -
> zroot allocated 94.3G -
> zroot readonly off -
> zroot comment - default
> zroot expandsize 16.0E -
> zroot freeing 0 default
> zroot fragmentation 0% -
> zroot leaked 0 default
> zroot feature at async_destroy enabled local
> zroot feature at empty_bpobj active local
> zroot feature at lz4_compress active local
> zroot feature at multi_vdev_crash_dump enabled local
> zroot feature at spacemap_histogram active local
> zroot feature at enabled_txg active local
> zroot feature at hole_birth active local
> zroot feature at extensible_dataset enabled local
> zroot feature at embedded_data active local
> zroot feature at bookmarks enabled local
> zroot feature at filesystem_limits enabled local
> zroot feature at large_blocks enabled local
> zroot feature at sha512 enabled local
> zroot feature at skein enabled local
> borg-new /home/ler $
>
> borg-new /home/ler $ gpart show
> => 40 3905945520 mfid0 GPT (1.8T)
> 40 1600 1 efi (800K)
> 1640 1024 2 freebsd-boot (512K)
> 2664 1432 - free - (716K)
> 4096 16777216 3 freebsd-swap (8.0G)
> 16781312 3889162240 4 freebsd-zfs (1.8T)
> 3905943552 2008 - free - (1.0M)
>
> => 40 3905945520 mfid1 GPT (1.8T)
> 40 1600 1 efi (800K)
> 1640 1024 2 freebsd-boot (512K)
> 2664 1432 - free - (716K)
> 4096 16777216 3 freebsd-swap (8.0G)
> 16781312 3889162240 4 freebsd-zfs (1.8T)
> 3905943552 2008 - free - (1.0M)
>
> => 40 3905945520 mfid2 GPT (1.8T)
> 40 1600 1 efi (800K)
> 1640 1024 2 freebsd-boot (512K)
> 2664 1432 - free - (716K)
> 4096 16777216 3 freebsd-swap (8.0G)
> 16781312 3889162240 4 freebsd-zfs (1.8T)
> 3905943552 2008 - free - (1.0M)
>
> => 40 3905945520 mfid3 GPT (1.8T)
> 40 1600 1 efi (800K)
> 1640 1024 2 freebsd-boot (512K)
> 2664 16777216 3 freebsd-swap (8.0G)
> 16779880 3889165680 4 freebsd-zfs (1.8T)
>
> => 40 3905945520 mfid5 GPT (1.8T)
> 40 1600 1 efi (800K)
> 1640 1024 2 freebsd-boot (512K)
> 2664 1432 - free - (716K)
> 4096 16777216 3 freebsd-swap (8.0G)
> 16781312 3889162240 4 freebsd-zfs (1.8T)
> 3905943552 2008 - free - (1.0M)
>
> => 40 3905945520 mfid4 GPT (1.8T)
> 40 1600 1 efi (800K)
> 1640 1024 2 freebsd-boot (512K)
> 2664 1432 - free - (716K)
> 4096 16777216 3 freebsd-swap (8.0G)
> 16781312 3889160192 4 freebsd-zfs (1.8T)
> 3905941504 4056 - free - (2.0M)
>
> borg-new /home/ler $
>
> this system was built last week, and I **CAN** rebuild it if necessary, but I didn't do anything strange (so I thought :) )
>
> On 01/31/2017 12:30 pm, Steven Hartland wrote: Your issue is the reported vdev_max_asize > vdev_asize:
> vdev_max_asize: 11947471798272
> vdev_asize: 11947478089728
>
> max asize is smaller than asize by 6291456
>
> For raidz1 Xsize should be the smallest disk Xsize * disks so:
> 1991245299712 * 6 = 11947471798272
>
> So your max asize looks right but asize looks too big
>
> Expand Size is calculated by:
> if (vd->vdev_aux == NULL && tvd != NULL && vd->vdev_max_asize != 0) {
> vs->vs_esize = P2ALIGN(vd->vdev_max_asize - vd->vdev_asize,
> 1ULL << tvd->vdev_ms_shift);
> }
>
> So the question is why is asize too big?
>
> Given you seem to have some random disk sizes do you have auto expand turned on?
>
> On 31/01/2017 17:39, Larry Rosenman wrote: vdev_path: n/a, vdev_max_asize: 11947471798272, vdev_asize: 11947478089728
--
Larry Rosenman http://people.freebsd.org/~ler [1]
Phone: +1 214-642-9640 E-Mail: ler at FreeBSD.org
US Mail: 17716 Limpia Crk, Round Rock, TX 78664-7281
--
Larry Rosenman http://people.freebsd.org/~ler
Phone: +1 214-642-9640 E-Mail: ler at FreeBSD.org
US Mail: 17716 Limpia Crk, Round Rock, TX 78664-7281
Links:
------
[1] http://people.freebsd.org/%7Eler
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