Date: Thu, 6 Nov 2014 14:41:04 +0100 From: Borja Marcos <borjam@sarenet.es> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS bug: Creating ZIL ignores vfs.zfs.min_auto_ashift Message-ID: <8E3EE484-9735-4BBD-9FB9-D52CC62C761A@sarenet.es> In-Reply-To: <545B715A.5060804@multiplay.co.uk> References: <B731A922-3F83-4D8E-A4EA-22C5CA8A3850@sarenet.es> <545B715A.5060804@multiplay.co.uk>
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On Nov 6, 2014, at 2:02 PM, Steven Hartland wrote:
> Your zdb output looks strange you have two children[1] entries are you =
sure your pool is not corrupt?
As far as I know, it's working fine, no need to summon the guardian of =
the lost children ;)
The extra "children" is the log device. I have verified it in a =
completely virgin (pun intended) system and indeed the log device
appears as a new "children" branch.
Let's see. This is the output without log or anything. Just a mirror.
# zpool status
pool: rpool
state: ONLINE
scan: scrub repaired 0 in 5h55m with 0 errors on Wed Oct 29 23:26:03 =
2014
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
ada0p3 ONLINE 0 0 0
ada2p3 ONLINE 0 0 0
errors: No known data errors
#=20
# zdb|more
rpool:
version: 5000
name: 'rpool'
state: 0
txg: 11739617
pool_guid: 18110845055860026534
hostid: 316898903
hostname: 'splunk'
vdev_children: 1
vdev_tree:
type: 'root'
id: 0
guid: 18110845055860026534
children[0]:
type: 'mirror'
id: 0
guid: 10858793804082837265
metaslab_array: 30
metaslab_shift: 32
ashift: 12
asize: 482922987520
is_log: 0
create_txg: 4
children[0]:
type: 'disk'
id: 0
guid: 10490056043151312448
path: '/dev/ada0p3'
phys_path: '/dev/ada0p3'
whole_disk: 1
DTL: 331
create_txg: 4
children[1]:
type: 'disk'
id: 1
guid: 2441255496794840851
path: '/dev/ada2p3'
phys_path: '/dev/ada2p3'
whole_disk: 1
DTL: 252
create_txg: 4
features_for_read:
com.delphix:hole_birth
com.delphix:embedded_data
If I add a zil,
zdb|more
rpool:
version: 5000
name: 'rpool'
state: 0
txg: 11741324
pool_guid: 18110845055860026534
hostid: 316898903
hostname: 'splunk'
vdev_children: 2
vdev_tree:
type: 'root'
id: 0
guid: 18110845055860026534
children[0]:
type: 'mirror'
id: 0
guid: 10858793804082837265
metaslab_array: 30
metaslab_shift: 32
ashift: 12
asize: 482922987520
is_log: 0
create_txg: 4
children[0]:
type: 'disk'
id: 0
guid: 10490056043151312448
path: '/dev/ada0p3'
phys_path: '/dev/ada0p3'
whole_disk: 1
DTL: 331
create_txg: 4
children[1]:
type: 'disk'
id: 1
guid: 2441255496794840851
path: '/dev/ada2p3'
phys_path: '/dev/ada2p3'
whole_disk: 1
DTL: 252
create_txg: 4
children[1]:
type: 'disk'
id: 1
guid: 16071425471468142310
path: '/dev/ada1'
phys_path: '/dev/ada1'
whole_disk: 1
metaslab_array: 0
metaslab_shift: 0
ashift: 9
asize: 40015757312
is_log: 1
create_txg: 11741324
features_for_read:
com.delphix:hole_birth
com.delphix:embedded_data
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