[SOLVED] What is the ZFS Defaultcompression when i say "on"?

[fireon]

Hello,

when you create an ZFS Filesystem you can enable compression. What compression level is used when i say "on"? Is that default lz4?

 

[killmasta93]

the rpool/swap uses zle but im going a limb and say the rpool uses lzjb but if you have another pool normally if you activate its best lz4 run this command to check

zfs get compression

 

[fireon]

I know this command. But it say's on default "on". I uses the lz4 compression on my pools, but i would like to know what "on" means.
ok, so what now, lzjb or zle?

 

[tom]

my pool (space) shows the following:

 zfs get compression space
NAME   PROPERTY     VALUE     SOURCE
space  compression  lz4       local

 

[fireon]

I think you understand me wrong. Here is on from ours:
This is an PVE Default:

rpool                 compression  on       local
rpool/ROOT            compression  on       inherited from rpool
rpool/ROOT/pve-1      compression  on       inherited from rpool
rpool/data            compression  on       inherited from rpool

Yes i can switch to lz4, i have done this on some othe pool on other machines. But i would like to know what compression is set at "on"?

Very Thanks

 

[mir]

Since fall 2015 the default compression algorithm in ZOL is LZ4 and since choosing compression=on means activate compression using default algorithm then your pools are using LZ4 -> http://open-zfs.org/wiki/Performance_tuning#Compression

 

[fireon]

Thanks for the link, that was what i'am searching for

 

[LnxBil]

Sorry @fireon, but I have to point out: RTFM :-D

The current default compression algorithm is either lzjb or, if the lz4_compress feature is enabled, lz4.​

So, just check yourself with

root@proxmox:/# zpool get feature@lz4_compress rpool
NAME   PROPERTY              VALUE                 SOURCE
rpool  feature@lz4_compress  active                local

And bingo! What @mir said :-D

 

[fireon]

Ah with "feature" nice thanks.