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Date:      Thu, 30 Jul 2020 11:19:01 +0000
From:      bugzilla-noreply@freebsd.org
To:        doc@FreeBSD.org
Subject:   =?UTF-8?B?W0J1ZyAyNDgzNDJdINCd0LUg0YHRgtCw0LHQuNC70YzQvdCw0Y8g?= =?UTF-8?B?0YDQsNCx0L7RgtCwIENUTEQrWnZvbA==?=
Message-ID:  <bug-248342-9-tz7l21kLzm@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-248342-9@https.bugs.freebsd.org/bugzilla/>
References:  <bug-248342-9@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D248342

--- Comment #2 from =D0=95=D0=B2=D0=B3=D0=B5=D0=BD=D0=B8=D0=B9 <pacanrulit@=
gmail.com> ---
English version:
Good day. We have a problem with zvols. Zvol's clones giving through ctld (=
100
clients). There is freeze in Windows client on 5-10 seconds, respectively
clients NTFS Windows are under zfs zvols. Problem begining when we destroyd=
 old
clones and snapshots and maked new snapshots and clones.

uname -a
FreeBSD bsd 11.2-RELEASE FreeBSD 11.2-RELEASE #0 r335510: Fri Jun 22 04:32:=
14
UTC 2018     root@releng2.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd=
64

Configuration zpool:=20
atime=3Doff dedup=3Doff sync=3Ddisabled compression=3Dlz4
=D0=9A=D0=BE=D0=BD=D1=84=D0=B8=D0=B3=D1=83=D1=80=D0=B0=D1=86=D0=B8=D1=8F CT=
LD:
portal-group test {
 discovery-auth-group no-authentication
 listen 192.168.173.206:3260
}
target iqn.orig1 {
auth-group no-authentication
portal-group test
lun 0 {
path /dev/zvol/ssd/orig/original1
ctl-lun 194
}}
target iqn.orig2 {
auth-group no-authentication
portal-group test
lun 0 {
path /dev/zvol/ssd/orig/original2
ctl-lun 195
}}
target iqn.orig3 {
auth-group no-authentication
portal-group test
lun 0 {=20
path /dev/zvol/ssd/orig/original3
ctl-lun 196 }}
target iqn.orig4 {
auth-group no-authentication
portal-group test
lun 0 {=20
path /dev/zvol/ssd/orig/original4
ctl-lun 198 }}
target iqn.games {
auth-group no-authentication
portal-group test
lun 0 {=20
path /dev/zvol/hdd/orig/games
ctl-lun 197 }}


target iqn.pc1 {=20
auth-group no-authentication=20
portal-group test
lun 0 {=20
path /dev/zvol/ssd/snap/win1=20
ctl-lun 1}
lun 1 {=20
path /dev/zvol/hdd/snap/win1=20
ctl-lun 101}}
target iqn.pc2 {=20
auth-group no-authentication=20
portal-group test=20
lun 0 {=20
path /dev/zvol/ssd/snap/win2=20
ctl-lun 2}
lun 1 {=20
path /dev/zvol/hdd/snap/win2=20
ctl-lun 102}}

So until iqn.pc100.
We tried on the difference hardware and Windows clients, but problem didnt
solve. Windows clients always configured for performance.
Piece of script destroy/make snap and clones:

ctladm remove -b block -l $name=20
cat /dev/null > /var/log/xferlog
zfs destroy -R ssd/orig/original$c@win$name
zfs snap ssd/orig/original$c@win$name
zfs clone ssd/orig/original$c@win$name ssd/snap/win$name
ctladm create -b block -l $name -o file=3D/dev/zvol/ssd/snap/win$name=20

Hardware:
Intel Xeon E5-2620
128Gb DDR3 ECC REG
SSD NVMe Samsung EVO 970 512Gb
SSD Intel DC4502 3.84Tb
NIC Mellanox ConnectX-2 10G SFP+

We believe on your help, becouse any ideas doesn't work.

--=20
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