Hi all,
A few days ago I was at a customer to configure some optimization settings on their FAS2020 running ONTAP 7.3.4 . The NetApp was configured without thin provisioning and deduplication.
After configuring some of the volumes with deduplication I noticed that two of the SAN volumes used for VMware where suddenly full for 100% after turning on dedup. I then tried to resize the volume with a few more GB but the space was swallowed immediately to 100%. Then I turned off dedup and resized the volume again with a few GB. And it still uses the allocated space immediately!
Here's some info about the configuration:
VOLUME options:
VMWAREOS01
nosnap=on, nosnapdir=on, minra=off, no_atime_update=off, nvfail=off,
ignore_inconsistent=off, snapmirrored=off, create_ucode=off,
convert_ucode=off, maxdirsize=9175, schedsnapname=ordinal,
fs_size_fixed=off, compression=off, guarantee=volume, svo_enable=off,
svo_checksum=off, svo_allow_rman=off, svo_reject_errors=off,
no_i2p=off, fractional_reserve=100, extent=off, try_first=volume_grow,
read_realloc=off, snapshot_clone_dependency=off
LUN settings:
/vol/vmwareos01/vmwareos01/vmwareos01.lun 500.1g (536952700928) (r/w, online, mapped)
Comment: "VMWare"
Serial#: P3S6GoXjA-gI
Share: none
Space Reservation: enabled
Multiprotocol Type: vmware
Maps: VMWareESX=0
Reservation:
df -r -h vmwareos01
Filesystem total used avail reserved Mounted on
/vol/vmwareos01/ 600GB 600GB 0GB 392GB /vol/vmwareos01/
snap reserve 0GB 0GB 0GB 0GB /vol/vmwareos01/..
I then created a test volume with EXACT the same settings. This volume can be resized with no problems:
Options:
voltest
nosnap=on, nosnapdir=off, minra=off, no_atime_update=off, nvfail=off,
ignore_inconsistent=off, snapmirrored=off, create_ucode=on,
convert_ucode=on, maxdirsize=9175, schedsnapname=ordinal,
fs_size_fixed=off, compression=off, guarantee=volume, svo_enable=off,
svo_checksum=off, svo_allow_rman=off, svo_reject_errors=off, no_i2p=on,
fractional_reserve=100, extent=off, try_first=volume_grow,
read_realloc=off, snapshot_clone_dependency=off
luntest
| /vol/TEST/TEST | 500m (524288000) | (r/w, online) |
| Comment: "test" |
| Serial#: P3S6GorDQrOx |
| Share: none |
| Space Reservation: enabled |
| Multiprotocol Type: vmware |
reservations:
AST01> df -r -h TEST
Filesystem total used avail reserved Mounted on
/vol/TEST/ 2048MB 1002MB 1045MB 4KB /vol/TEST/
snap reserve 0GB 0GB 0GB 0GB /vol/TEST/
I browsed through NetApp online bugs, couldn't find any bugs that comes close to my situation.
Any help would be great!
Thanks in advance
-Rick
