[SOLVED] ZFS Compression, what is the best to use?

[fireon]

Hello,

this day have seen that compression is default on (rpool) lz4 by new installations. On my old installation (Upgrade machine from pve3 to pve4) there is the defaultcompression to "on". So what are the differences?

On my v-machines pool the compression was not activated. I set it this day to "on" and one VM to "lz4". So what is right?

zfs get compression
NAME                                           PROPERTY     VALUE     SOURCE
rpool                                          compression  on        local
rpool/ROOT                                     compression  on        inherited from rpool
rpool/ROOT/pve-1                               compression  on        inherited from rpool
rpool/ROOT/pve-1@12_2015                       compression  -         -
rpool/ROOT/pve-1/vm-108-disk-1                 compression  on        inherited from rpool
rpool/swap                                     compression  on        inherited from rpool
v-machines                                     compression  on        local
v-machines/home                                compression  on        inherited from v-machines
v-machines/home@12_2015                        compression  -         -
v-machines/vm-100-disk-2                       compression  lz4       local
v-machines/vm-100-disk-2@vor_vnsi_xvdr_update  compression  -         -
v-machines/vm-101-disk-1                       compression  on        local
v-machines/vm-102-disk-1                       compression  on        inherited from v-machines
v-machines/vm-102-disk-1@vor_kernel4           compression  -         -
v-machines/vm-102-state-vor_kernel4            compression  on        inherited from v-machines
v-machines/vm-103-disk-2                       compression  on        inherited from v-machines
v-machines/vm-104-disk-1                       compression  on        inherited from v-machines
v-machines/vm-105-disk-1                       compression  on        inherited from v-machines
v-machines/vm-106-disk-1                       compression  on        inherited from v-machines
v-machines/vm-107-disk-1                       compression  on        inherited from v-machines

Thanks and best Regards
fireon

 

[Nemesiz]

You have a lot of questions http://open-zfs.org/wiki/Performance_tuning#Compression

http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide ( don`t know why it doesn't open to me )

 

[fireon]

You have a lot of questions

Yes, Knowledge is power

Thanks for you answer. So on=LZ4

Best Regards

 

[RobFantini]

zfs set compression=lz4 rpool

 

[RobFantini]

also oracle deleted or moved the guide awhile ago.

try to download from http://wiki.illumos.org/download/attachments/1146951/zfs_last.pdf

I put that to wiki..

 

[Nemesiz]

also oracle deleted or moved the guide awhile ago.

try to download from http://wiki.illumos.org/download/attachments/1146951/zfs_last.pdf

I put that to wiki..

Page 13 is very interesting

 

[fireon]

Huch... nice PDF.

 

[RobFantini]

Page 13 is very interesting

That is incredible . and imagine having 3000 rack servers to test with.

I wonder how much zfs on linux is used at Cern and Lawrence Livermore National Laboratory .