Hello. I've had success with getting shadowcopy listings to show on my
Windows clients that access a samba share running on my Fedora 33 server
which has a ZFS volume as a share. I have nested ZFS datasets with the
highest level dataset acting as the root of my share. Any directories that
are stored on the highest level dataset(/storage/Share) including the
dataset itself shows a shadowcopy listing exactly as I desire it every time
consistently. Unfortunately some of the directories under the nested
datasets (such as /storage/Share/Backup) including the nested datasets
themselves only show the shadowcopy entries intermittently. I'm not quite
sure why as when I check the zfs snapshot listings every dataset both those
working and not working show the same pattern of snapshot naming scheme,
etc.
# zfs list
NAME USED AVAIL REFER MOUNTPOINT
storage 31.7T 29.7T 279K /storage
storage/Share 31.7T 29.7T 6.78T /storage/Share
storage/Share/Backup 11.3T 29.7T 9.24T /storage/Share/Backup
storage/Share/Archive 3.73T 29.7T 3.73T /storage/Share/Archive
storage/Share/Documents 847M 29.7T 838M
/storage/Share/Documents
storage/Share/Software 30.1G 29.7T 30.0G
/storage/Share/Software
[Share]
comment = Share
path = /storage/Share
veto files = /storage/Share/lost+found
writable = yes
browseable = yes
guest ok = yes
oplocks = False
level2 oplocks = False
vfs objects = shadow_copy2
shadow: snapdir = .zfs/snapshot
shadow: sort = desc
shadow: format = -%Y-%m-%d-%H%M
shadow: snapprefix = ^zfs-auto-snap_.*
shadow: delimiter = -20
shadow: snapdirseverywhere = yes
shadow: crossmountpoints = yes
# smbd --version
Version 4.13.4
[root at media ~]# zfs list -t snapshot storage/Share
NAME USED AVAIL
REFER MOUNTPOINT
storage/Share at zfs-auto-snap_monthly-2020-08-19-0927 250M -
6.20T -
storage/Share at zfs-auto-snap_monthly-2020-09-01-0500 252M -
6.24T -
storage/Share at zfs-auto-snap_monthly-2020-09-18-0814 259M -
6.26T -
storage/Share at zfs-auto-snap_monthly-2020-10-01-0500 260M -
6.34T -
storage/Share at zfs-auto-snap_monthly-2020-10-18-0813 266M -
6.38T -
storage/Share at zfs-auto-snap_monthly-2020-11-01-0500 274M -
6.41T -
storage/Share at zfs-auto-snap_monthly-2020-11-17-1004 275M -
6.41T -
storage/Share at zfs-auto-snap_monthly-2020-12-01-0600 304M -
6.44T -
.....
storage/Share at zfs-auto-snap_hourly-2021-02-05-0001 0B
- 6.78T -
storage/Share at zfs-auto-snap_frequent-2021-02-05-0045 0B
- 6.78T -
storage/Share at zfs-auto-snap_hourly-2021-02-05-0100 0B
- 6.78T -
storage/Share at zfs-auto-snap_frequent-2021-02-05-0100 0B
- 6.78T -
storage/Share at zfs-auto-snap_hourly-2021-02-05-0101 0B
- 6.78T -
storage/Share at zfs-auto-snap_frequent-2021-02-05-0115 2.16M
- 6.78T -
storage/Share at zfs-auto-snap_frequent-2021-02-05-0130 2.34M
- 6.78T -
.....
storage/Share/Software at zfs-auto-snap_hourly-2021-02-04-2101 0B
- 30.0G -
storage/Share/Software at zfs-auto-snap_hourly-2021-02-04-2200 0B
- 30.0G -
storage/Share/Software at zfs-auto-snap_hourly-2021-02-04-2201 0B
- 30.0G -
storage/Share/Software at zfs-auto-snap_hourly-2021-02-04-2300 0B
- 30.0G -
storage/Share/Software at zfs-auto-snap_hourly-2021-02-04-2301 0B
- 30.0G -
storage/Share/Software at zfs-auto-snap_hourly-2021-02-05-0000 0B
- 30.0G -
storage/Share/Software at zfs-auto-snap_hourly-2021-02-05-0001 0B
- 30.0G -
storage/Share/Software at zfs-auto-snap_frequent-2021-02-05-0045 0B
- 30.0G -
storage/Share/Software at zfs-auto-snap_hourly-2021-02-05-0100 0B
- 30.0G -
storage/Share/Software at zfs-auto-snap_frequent-2021-02-05-0100 0B
- 30.0G -
storage/Share/Software at zfs-auto-snap_hourly-2021-02-05-0101 0B
- 30.0G -
storage/Share/Software at zfs-auto-snap_frequent-2021-02-05-0115 0B
- 30.0G -
storage/Share/Software at zfs-auto-snap_frequent-2021-02-05-0130 0B
- 30.0G -
.....
It seems pretty consistent that when I first check the shadowcopy entries
for one of the nested dataset directories nothing will be listed, but if I
check immediately afterwards the entries are listed. Not sure if I have a
setting wrong or if this might be a bug(if so with Windows or samba??)?
Any assistance would be appreciated.